S9Y Serendipity HTML Injection and Cross-Site Scripting Vulnerabilities

Bugtraq ID:	28885
Class:	Input Validation Error
CVE:	CVE-2008-1385 CVE-2008-1386
Remote:	Yes
Local:	No
Published:	Apr 22 2008 12:00AM
Updated:	Apr 22 2008 09:17PM
Credit:	Hanno Boeck
Vulnerable:	S9Y Serendipity 1.3
Not Vulnerable:	S9Y Serendipity 1.3.1

S9Y Serendipity HTML Injection and Cross-Site Scripting Vulnerabilities

S9Y Serendipity is prone to an HTML-injection vulnerability and multiple cross-site scripting vulnerabilities because it fails to properly sanitize user-supplied input.

An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials, control how the site is rendered to the user, or launch other attacks.

S9Y Serendipity 1.3 is vulnerable; other versions may also be affected.

S9Y Serendipity HTML Injection and Cross-Site Scripting Vulnerabilities

Attackers can exploit these issues through a browser. To exploit the cross-site scripting issue, attackers must entice an unsuspecting user to follow a malicious URI.

The following proof of concept is available for the referrer issue:

wget --referer='http://<hr onMouseOver="alert(7)">' http://someblog.com/

S9Y Serendipity HTML Injection and Cross-Site Scripting Vulnerabilities

Solution:
The vendor released updates to address these issues. Please see the references for more information.

S9Y Serendipity HTML Injection and Cross-Site Scripting Vulnerabilities

References:

• Serendipity 1.3.1 released (S9Y)
  
• Serendipity Homepage (S9Y)
  
• Correcting CVEs (was Re: [Full-disclosure] Cross site scripting issues in s9y (C (Hanno Böck )
  
• ross site scripting issues in s9y (CVE-2008-1386, CVE-2008-1387) ()
  
• Cross Site Scripting (XSS) in serendipity 1.3 installer, CVE-2008-1386 (Hanno Boeck)
  
• Cross Site Scripting (XSS) in serendipity 1.3 referrer plugin, CVE-2008-1385 (Hanno Boeck)