{"id":624,"date":"2020-11-25T07:24:43","date_gmt":"2020-11-24T23:24:43","guid":{"rendered":"https:\/\/byy3.com\/?p=624"},"modified":"2021-01-09T10:13:59","modified_gmt":"2021-01-09T02:13:59","slug":"linux%e6%8f%90%e6%9d%83root%e5%b0%8f%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"https:\/\/byy3.com\/?p=624","title":{"rendered":"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3"},"content":{"rendered":"<h1>Linux\u63d0\u6743\u5c0f\u603b\u7ed3<\/h1>\n<h2>0x01 \u5229\u7528\u5185\u6838\u6808\u6ea2\u51fa<\/h2>\n<p>\u5229\u7528\u5df2\u77e5\u7684\u6f0f\u6d1e\uff0c\u5982\u810f\u725b\u7b49\u3002<\/p>\n<h2>0x02 \u5bc6\u7801\u63d0\u6743<\/h2>\n<p>\u9996\u5148\u9700\u8981\u4ecb\u7ecd\u4e24\u4e2a\u6587\u4ef6\u00a0<strong>\/etc\/passwd<\/strong>\u00a0\u548c\u00a0<strong>\/etc\/shadow<\/strong><br \/>\n<strong>1. \/etc\/passwd<\/strong><br \/>\npasswd \u6587\u4ef6\u50a8\u5b58\u4e86\u7528\u6237\u7684\u5177\u4f53\u4fe1\u606f\uff0c\u5168\u7528\u6237\u53ef\u8bfb\uff0croot\u53ef\u5199<\/p>\n<blockquote><p>daemon:x:1:1:daemon:\/usr\/sbin:\/bin\/sh<\/p><\/blockquote>\n<p>\u7531\u5192\u53f7\u5206\u5272\uff0c\u7b2c\u4e00\u5217\u662f\u7528\u6237\u540d\uff08daemon\uff09\uff1b<br \/>\n\u7b2c\u4e8c\u5217\u662f\u5bc6\u7801\uff0cx\u8868\u793a\u5bc6\u7801\u7684hash\u503c\u4fdd\u5b58\u5728shadow\u6587\u4ef6\u4e2d<br \/>\n\u7b2c\u4e09\u5217\u662fUID<br \/>\n\u7b2c\u56db\u5217\u662fGID<br \/>\n\u7b2c\u4e94\u5217\u662f\u7528\u6237\u5168\u540d\u6216\u672c\u5730\u8d26\u53f7<br \/>\n\u7b2c\u516d\u5217\u662fhome\u76ee\u5f55<br \/>\n\u7b2c\u4e03\u5217\u662f\u767b\u5f55\u4e4b\u540e\u4f7f\u7528\u7684\u7ec8\u7aef\u547d\u4ee4<\/p>\n<p>passwd\u6587\u4ef6\u662f\u53ef\u5199\u7684\uff0c\u5982\u679c\u5c06\u5bc6\u7801X\u66ff\u6362\u6210\u6211\u4eec\u81ea\u5df1\u7684hash\uff0c\u5c31\u53ef\u4ee5\u6539\u53d8\u76ee\u6807\u7684root\u5bc6\u7801<\/p>\n<p><strong>2. \/etc\/shadow<\/strong><br \/>\nshadow\u6587\u4ef6\u53ea\u6709root\u53ef\u8bfb\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u6587\u4ef6\u7684\u503c\u53d6\u51fa\u6765\u540e\u7528\u00a0<strong>hashcat\u3001john<\/strong>\u7206\u7834<\/p>\n<blockquote><p>root:$6$JNHsN5GY.jc9CiTg$MjYL9NyNc4GcYS2zNO6PzQNHY2BE\/YODBUuqsrpIlpS9LK3xQ6coZs6lonzURBJUDjCRegMHSF5JwCMG1az8k.:18134:0:99999:7:::<\/p><\/blockquote>\n<p>\u540c\u6837\u4ee5\u5206\u53f7\u5206\u5272\uff0c\u7b2c\u4e00\u5217\u662f\u7528\u6237\u540d\u79f0(root)<br \/>\n\u7b2c\u4e8c\u5217\u662f\u52a0\u5bc6\u540e\u7684\u5bc6\u7801\uff08$6$JNHsN5GY.jc9CiTg$MjYL9NyNc4GcYS2zNO6PzQNHY2BE\/YODBUuqsrpIlpS9LK3xQ6coZs6lonzURBJUDjCRegMHSF5JwCMG1az8k.\uff09<br \/>\n\u7b2c\u4e09\u5217\u662f\u6700\u8fd1\u6539\u52a8\u5bc6\u7801\u7684\u65e5\u671f\uff0818134\uff09<br \/>\n\u7b2c\u56db\u5217\u662f\u5bc6\u7801\u4e0d\u53ef\u88ab\u53d8\u66f4\u7684\u5929\u6570\uff1a\u8bbe\u7f6e\u4e86\u8fd9\u4e2a\u503c\uff0c\u5219\u8868\u793a\u4ece\u53d8\u66f4\u5bc6\u7801\u7684\u65e5\u671f\u7b97\u8d77\uff0c\u591a\u5c11\u5929\u5185\u65e0\u6cd5\u518d\u6b21\u4fee\u6539\u5bc6\u7801\uff0c\u5982\u679c\u662f0\u7684\u8bdd\uff0c\u5219\u8868\u793a\u6ca1\u6709\u9650\u5236<br \/>\n\u7b2c\u4e94\u5217\u662f\u5bc6\u7801\u9700\u8981\u91cd\u65b0\u53d8\u66f4\u7684\u5929\u6570\uff1a\u5982\u679c\u662f99999\uff0c\u5219\u8868\u793a\u6ca1\u6709\u9650\u5236<br \/>\n\u7b2c\u516d\u5217\u662f\u5bc6\u7801\u8fc7\u671f\u9884\u8b66\u5929\u6570\uff087\uff09<br \/>\n\u7b2c\u4e03\u5217\u662f\u5bc6\u7801\u8fc7\u671f\u7684\u5bbd\u6055\u65f6\u95f4<br \/>\n\u7b2c\u516b\u5217\u662f\u8d26\u53f7\u5931\u6548\u65f6\u95f4<br \/>\n\u7b2c\u4e5d\u5217\u662f\u4fdd\u7559\u7684<\/p>\n<h2>0x03 \u5bc6\u7801\u590d\u7528<\/h2>\n<p>\u5982\u6570\u636e\u5e93\u3001\u540e\u53f0web\u5bc6\u7801\uff0c\u53ef\u80fd\u5c31\u662froot\u5bc6\u7801<\/p>\n<h2>0x04 sudo\u6ee5\u7528<\/h2>\n<p>sudo\u662f\u5e73\u5e38\u7528\u6765\u63d0\u6743\u7684\u547d\u4ee4\uff0c\u5f53\u6267\u884c\u6743\u9650\u4e0d\u591f\u65f6\uff0c\u53ef\u4ee5\u7528\u8fd9\u4e2a\u547d\u4ee4\u6765\u63d0\u5347\u6743\u9650\u3002\u5176\u914d\u7f6e\u6587\u4ef6\u662f\u00a0<strong>\/etc\/sudoers<\/strong>\uff0c\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u8bb0\u5f55\u4e86\u53ef\u4ee5\u6267\u884csudo\u7684\u7528\u6237\u3001\u5b9a\u4e49\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u53ef\u4ee5root\u8bbf\u95ee\u3001\u662f\u5426\u9700\u8981\u5bc6\u7801\u9a8c\u8bc1\u3002<\/p>\n<p><code>sudo -l<\/code>\u8fd9\u4e2a\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u6709\u54ea\u4e9b\u547d\u4ee4\u53ef\u4ee5\u6267\u884c\uff0c\u5373\u4e0d\u9700\u8981\u77e5\u9053\u7528\u6237\u5bc6\u7801\uff0c\u53ea\u9700\u9a8c\u8bc1\u81ea\u8eab\u6743\u9650\u7684\u5bc6\u7801\u5373\u53ef<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-677\" data-original=\"https:\/\/byy3.com\/wp-content\/uploads\/2020\/11\/2020112700372937.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"637\" height=\"72\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe\" \/><\/p>\n<p>\u5982\u4e0a\u56fe\u6240\u793a\uff0c\u53ef\u4ee5\u7528cat\u547d\u4ee4\u63d0\u5347\u4e3aroot\u6743\u9650<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708172835-65854ffc-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe1\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe1\" \/><\/p>\n<h2>0x05 \u5b9a\u65f6\u4efb\u52a1<\/h2>\n<p>\u53ef\u4ee5\u4f7f\u7528<a href=\"https:\/\/byy3.com\/go\/?url=https:\/\/github.com\/DominicBreuker\/pspy\/releases\" target=\"_blank\" rel=\"noopener noreferrer\" rel=\"nofollow\" >pspy64<\/a>\u67e5\u770b\u7cfb\u7edf\u540e\u53f0\u4efb\u52a1\u6267\u884c\u72b6\u51b5<br \/>\n\u6bd4\u5982\u627e\u5230\u4e0b\u56fe\u8fd9\u4e2a\u5b9a\u65f6\u4efb\u52a1<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708172907-791cf290-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe2\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe2\" \/><\/p>\n<p>\u6839\u636e\u8fd9\u4e2aUID1183\uff0c\u7ed3\u5408<code>\/etc\/passwd<\/code>\u00a0\u53ef\u4ee5\u627e\u5230\u6267\u884c\u8fd9\u4e2a\u811a\u672c\u7684\u7528\u6237\uff08vanshal\uff09<br \/>\n\u63a5\u4e0b\u6765\u53ef\u4ee5\u5728\u8fd9\u4e2a\u811a\u672c\u4e2d\u5199\u5165\u53cd\u5f39shell<\/p>\n<p>\u5728backup.sh\u4e2d\u5199\u5165\u53cd\u5f39shell<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708172930-8660dffc-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe3\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe3\" \/><\/p>\n<p>\u5728kali\u76d1\u542c<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708172945-8fbf0fb0-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe4\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe4\" \/><\/p>\n<p>\u6210\u529f\u63d0\u6743\u4e3avanshal<\/p>\n<h2>0x06 SUID<\/h2>\n<p>\u53c2\u8003\u94fe\u63a5\uff1a<a href=\"https:\/\/byy3.com\/go\/?url=https:\/\/www.anquanke.com\/post\/id\/86979\" target=\"_blank\" rel=\"noopener noreferrer\" rel=\"nofollow\" >\u3010\u5b89\u5168\u79d1\u666e\u3011Linux\u63d0\u6743\u2014\u2014\u5229\u7528\u53ef\u6267\u884c\u6587\u4ef6SUID<\/a><br \/>\nSUID \u662f\u4e00\u79cd\u7279\u6b8a\u7684\u6587\u4ef6\u5c5e\u6027\uff0c\u5141\u8bb8\u7528\u6237\u4ee5\u8be5\u6587\u4ef6\u7684\u62e5\u6709\u8005\u7684\u8eab\u4efd\u8fd0\u884c<br \/>\n\u67e5\u627eSUID\u6587\u4ef6<\/p>\n<blockquote><p>find \/ -user root -perm -4000 -print 2&gt;\/dev\/null<br \/>\nfind \/ -perm -u=s -type f 2&gt;\/dev\/null<br \/>\nfind \/ -user root -perm -4000 -exec ls -ldb {} ;<\/p><\/blockquote>\n<p>\u4f8b\u5982\uff0c\u4e0b\u56fe\u627e\u5230\u4e86\u4e00\u4e2a\u00a0<strong>\/scripts\/find<\/strong>\u00a0\u6587\u4ef6\u5177\u6709s\u5c5e\u6027<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708173005-9bad7d66-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe5\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe5\" \/><\/p>\n<p>\u7528<code>ls -l \/scripts\/find<\/code>\u00a0\u67e5\u770bfind<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708173019-a3f41372-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe6\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe6\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u8fd9\u662f\u5c5e\u4e8enightfall\u7684<br \/>\n<img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708173037-ae6a0866-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe7\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe7\" \/><\/p>\n<p>\u5229\u7528suid\u6267\u884c\u65f6\u53ef\u4ee5\u83b7\u53d6\u6587\u4ef6\u6240\u6709\u8005\u6743\u9650\u7684\u7279\u6027\uff0c\u83b7\u5f97nightfall<br \/>\n<code>\/scripts\/find . -exec \"\/bin\/sh\" -p \\;<\/code><\/p>\n<blockquote><p>-exec\uff1a\u5c06find\u5185\u5bb9\u653e\u5230\u540e\u9762\u7684\u6307\u4ee4\u6267\u884c<br \/>\n\/bin\/sh\uff1a\u6267\u884csh<br \/>\n-p\uff1a\u7528\u6587\u4ef6\u7684\u6240\u6709\u8005\u6743\u9650\u6267\u884csh<br \/>\n\\; \uff1a\u7528\u5206\u53f7\u8f6c\u4e49<\/p><\/blockquote>\n<p><img decoding=\"async\" data-original=\"https:\/\/f5.pm\/img.php?ref=http%3A%2F%2Fxz.aliyun.com%2Ft%2F7998&amp;f=https:\/\/xzfile.aliyuncs.com\/media\/upload\/picture\/20200708173051-b6a8f942-c0fd-1.png\" src=\"https:\/\/byy3.com\/wp-content\/themes\/MNews%20V2.4\/images\/post-loading.gif\" width=\"100%\" title=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe8\" alt=\"Linux\u63d0\u6743root\u5c0f\u603b\u7ed3\u63d2\u56fe8\" \/><br \/>\n\u5f97\u5230\u4e86nightfall\u6743\u9650<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Linux\u63d0\u6743\u5c0f\u603b\u7ed3 0x01 \u5229\u7528\u5185\u6838\u6808\u6ea2\u51fa \u5229\u7528\u5df2\u77e5\u7684\u6f0f\u6d1e\uff0c\u5982\u810f\u725b\u7b49\u3002 0x02 \u5bc6\u7801\u63d0\u6743 \u9996\u5148\u9700\u8981\u4ecb\u7ecd\u4e24 [&hellip;]<\/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":[147,353,146,148],"class_list":["post-624","post","type-post","status-publish","format-standard","hentry","category-linux","category-net-security","tag-linux-root","tag-linux","tag-root"],"_links":{"self":[{"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/624","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=624"}],"version-history":[{"count":0,"href":"https:\/\/byy3.com\/index.php?rest_route=\/wp\/v2\/posts\/624\/revisions"}],"wp:attachment":[{"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/byy3.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}