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Secunia Advisory SA36426

Feed Sidebar Firefox Extension Code Execution Vulnerability
Secunia Advisory SA36426
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Release Date 2009-08-24
   
Popularity 1,281 view
Comments 0 comments

Criticality level Moderately criticalModerately critical
Impact System access
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Workaround
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Software:
Feed Sidebar 3.x (extension for Firefox)
Secunia CVSS Score Available in Customer Area
CVE Reference(s) No CVE references.
  

Description

A vulnerability has been discovered in the Feed Sidebar extension for Firefox, which can be exploited by malicious people to compromise a user's system.

Input passed via RSS feeds is not properly sanitised before being used. This can be exploited to e.g. execute arbitrary script code within the "chrome:" context and execute arbitrary commands on a user's system.

Successful exploitation requires that a user subscribes to a specially crafted RSS feed.

The vulnerability is confirmed in version 3.1.6. Other versions may also be affected.


Solution
Fixed in version 3.2pre2 and later.

Provided and/or discovered by
Nick Freeman, Security-Assessment.com

Original Advisory
Feed Sidebar:
http://www.chrisfinke.com/2009/03/14/feed-sidebar-32-beta-update/

Security-Assessment.com:
http://security-assessment.com/files/advisories/Feed_Sidebar_Firefox_Extension_Privileged_Code_Injection.pdf

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Feed Sidebar Firefox Extension Code Execution Vulnerability
 
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