Vulnerability Note VU#759273

Mozilla QueryInterface memory corruption vulnerability

Overview

Mozilla Firefox web browser and Thunderbird mail client contain a memory corruption vulnerability that may allow a remote attacker to execute arbitrary code.

I. Description

The Mozilla Firefox QueryInterface method contains a memory corruption vulnerability. According to Mozilla:

Calling the QueryInterface method of the built-in Location and Navigator objects causes memory corruption that might be exploitable to run arbitrary code.

Note that JavaScript must be enabled in order for this vulnerability to exist. JavaScript is enabled by default in the Firefox and Mozilla web browsers, but not in the Mozilla's mail client or Thunderbird. Exploitation can occur by accessing a specially crafted web page with Firefox. If JavaScript is enabled within Mozilla's mail client or Thunderbird, then this issue may be exploitable by opening a specially crafted email.

We are aware of working exploit code for this vulnerability.

II. Impact

A remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system.

III. Solution

Upgrade

This issue is fixed in Firefox 1.5.0.1 and SeaMonkey 1.0.

Disable JavaScript in Firefox

Users who are unable to upgrade to a fixed version of the software are encouraged to disable JavaScript in the Firefox web browser and Thunderbird.

Systems Affected

Vendor	Status	Date Updated
Mozilla, Inc.	Vulnerable	7-Feb-2006
Red Hat, Inc.	Not Vulnerable	9-Feb-2006

References

http://www.mozilla.org/security/announce/mfsa2006-04.html
http://www.mozilla.com/firefox/releases/1.5.0.1.html
http://www.mozilla.org/projects/security/known-vulnerabilities.html#firefox1.5.0.1
https://bugzilla.mozilla.org/show_bug.cgi?id=319296
http://www.securityfocus.com/bid/16476
http://www.frsirt.com/english/advisories/2006/0413
http://secunia.com/advisories/18700
http://secunia.com/advisories/18704

Credit

These vulnerabilities were reported by Georgi Guninski.

This document was written by Jeff Gennari.

Other Information

Date Public	02/02/2006
Date First Published	02/07/2006 11:20:26 AM
Date Last Updated	02/09/2006
CERT Advisory
CVE Name	CVE-2006-0295
US-CERT Technical Alerts
Metric	15.46
Document Revision	36

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Produced 2006 by US-CERT, a government organization
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