{"id":166,"date":"2023-03-05T20:05:52","date_gmt":"2023-03-05T12:05:52","guid":{"rendered":"https:\/\/blog.byzhb.top\/?p=166"},"modified":"2023-03-05T20:15:04","modified_gmt":"2023-03-05T12:15:04","slug":"ysl","status":"publish","type":"post","link":"https:\/\/blog.byzhb.top\/index.php\/2023\/03\/05\/ysl\/","title":{"rendered":"PHP\u539f\u751f\u7c7b\u53ca\u5176\u5229\u7528"},"content":{"rendered":"<h1>\u524d\u8a00\uff1a<\/h1>\n<p>\u524d\u51e0\u5929\u6253CTF\uff0c\u9047\u89c1\u4e86\u4e00\u9053\u8fd9\u6837\u7684\u9898<\/p>\n<pre class=\"code\"><span class=\"token delimiter important\">&lt;?php<\/span> \r\n<span class=\"token variable\">$a<\/span> <span class=\"token operator\">=<\/span> <span class=\"token variable\">$_GET<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string single-quoted-string\">'a'<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> \r\n<span class=\"token variable\">$b<\/span> <span class=\"token operator\">=<\/span> <span class=\"token variable\">$_GET<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string single-quoted-string\">'b'<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> \r\n<span class=\"token keyword\">echo<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token variable\">$a<\/span><span class=\"token punctuation\">(<\/span><span class=\"token variable\">$b<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> \r\n<span class=\"token operator\">?<\/span><span class=\"token operator\">&gt;<\/span><\/pre>\n<p>\u663e\u7136\uff0c\u9898\u4e2d\u6ca1\u6709\u7ed9\u51fa\u4efb\u4f55\u53ef\u5229\u7528\u7684class\uff0c\u5728\u4e00\u9635\u82e6\u601d\u51a5\u60f3\u4e0b\u627e\u5230\u4e86\u4e00\u4e9bPHP\u7684\u539f\u751f\u7684\u7c7b\uff0c\u6210\u529f\u89e3\u51b3\u4e86\u6b64\u9898<\/p>\n<h1>\u67e5\u627e\u6587\u4ef6\u7684\u539f\u751f\u7c7b\uff1a<\/h1>\n<h2>DirectoryIterator\uff1a<\/h2>\n<p>\u8be5\u7c7b\u53ef\u914d\u5408glob\u4f2a\u534f\u8bae\u67e5\u627e\u6587\u4ef6\uff0c\u5b83\u4f1a\u521b\u5efa\u4e00\u4e2a\u6307\u5b9a\u76ee\u5f55\u7684\u8fed\u4ee3\u5668\uff0c\u5f53\u9047\u5230<span style=\"color: #ff0000;\"><strong>echo<\/strong><\/span>\u8f93\u51fa\u65f6\u4f1a\u89e6\u53d1<span style=\"color: #ff00ff;\">Directorylterator<\/span>\u4e2d\u7684<span style=\"color: #ff9900;\">__toString<\/span>()\u65b9\u6cd5\uff0c<strong>\u8f93\u51fa\u6307\u5b9a\u76ee\u5f55\u91cc\u9762\u7ecf\u8fc7\u6392\u5e8f\u4e4b\u540e\u7684\u7b2c\u4e00\u4e2a\u6587\u4ef6\u540d<\/strong>\u3002<\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre class=\"code\">Directorylterator(glob:\/\/*flag*)<\/pre>\n<h2>FilesystemIterator:<\/h2>\n<p>\u8fd9\u4e2a\u7ee7\u627f\u4e86DirectoryIterator\u7c7b\uff0c\u5229\u7528\u65b9\u6cd5\u540c\u4e0a<\/p>\n<h2>GlobIterator\uff1a<\/h2>\n<p>\u901a\u8fc7\u540d\u5b57\u53ef\u4ee5\u770b\u51fa\u6765\uff0c\u8fd9\u4e2a\u5177\u6709global\u6027\u8d28\uff0c\u53ef\u4ee5\u641c\u7d22\u5168\u5c40\u7684\u6587\u4ef6\uff0c\u56e0\u6b64\u65e0\u9700\u501f\u52a9glob:\/\/\u4f2a\u534f\u8bae<\/p>\n<p><strong>\u53ef\u76f4\u63a5\u4f7f\u7528:<\/strong><\/p>\n<pre class=\"code\"> GlobIterator(*flag*)<\/pre>\n<h1>\u8bfb\u53d6\u6587\u4ef6\u7684\u539f\u751f\u7c7b\uff1a<\/h1>\n<h3>SplFileObject\uff1a<\/h3>\n<p>\u5f53\u6211\u4eec\u901a\u8fc7\u53ef\u67e5\u627e\u6587\u4ef6\u7684\u539f\u751f\u7c7b\u67e5\u627e\u5230\u654f\u611f\u6587\u4ef6\u65f6\u53ef\u7528\u6b64\u7c7b\uff0c\u6765\u8bfb\u53d6\u654f\u611f\u6587\u4ef6\u5185\u7684\u5185\u5bb9<\/p>\n<p>\u8be5\u7c7b\u540c\u6837\u901a\u8fc7<span style=\"color: #ff0000;\">echo<\/span>\u89e6\u53d1SplFileObject\u4e2d\u7684<span style=\"color: #ff0000;\"><strong>__toString()<\/strong><\/span>\u65b9\u6cd5\u3002<em>(\u8be5\u7c7b\u4e0d\u652f\u6301\u901a\u914d\u7b26\uff0c\u6240\u4ee5\u5fc5\u987b\u5148\u83b7\u53d6\u5230\u5b8c\u6574\u6587\u4ef6\u540d\u79f0\u624d\u884c)<\/em><\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre class=\"code\">SplFileObject(flag.php)<\/pre>\n<p>\u4f46\u662f\u76f4\u63a5\u52a0\u5165\u6587\u4ef6\u7684\u7684\u8bdd\uff0c\u5b83\u53ea\u4f1a\u8fd4\u56de\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u5b57\u7b26\uff0c\u5982\u679c\u60f3\u8981\u8fd4\u56de\u6587\u4ef6\u5168\u90e8\u5185\u5bb9\u7684\u8bdd\u987b\u501f\u52a9<span style=\"color: #ff0000;\"><strong>php:\/\/filter<\/strong><\/span><strong>\u4f2a\u534f\u8bae<\/strong><\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre class=\"code\">SplFileObject(php:\/\/filter\/read=convert.base64-encode\/resource=flag.php)<\/pre>\n<h1>\u603b\u7ed3\uff1a<\/h1>\n<p>\u6253CTF\u8fd8\u662f\u8981\u591a\u5b66\u591a\u7ec3\uff0c\u5728\u9898\u76ee\u4e2d\u6240\u78b0\u5230\u7684\u77e5\u8bc6\u70b9\u5343\u5947\u767e\u602a\uff0c\u8fd8\u662f\u5f97\u591a\u79ef\u7d2f\uff0c\u575a\u6301\u4e00\u5929\u4e00\u9053CTF\u9898<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u5355\u6613\u61c2\u7684PHP\u539f\u751f\u7c7b\u53ca\u5176\u5229\u7528\u8bb2\u89e3<\/p>\n","protected":false},"author":1,"featured_media":169,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,1],"tags":[15,7],"class_list":["post-166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ctf","category-uncategorized","tag-ctf","tag-php"],"_links":{"self":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/166","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=166"}],"version-history":[{"count":4,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/166\/revisions"}],"predecessor-version":[{"id":172,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/posts\/166\/revisions\/172"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media\/169"}],"wp:attachment":[{"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/media?parent=166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/categories?post=166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.byzhb.top\/index.php\/wp-json\/wp\/v2\/tags?post=166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}