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Mozilla QueryInterface memory corruption vulnerability

Vulnerability Note VU#759273

Original Release Date: 2006-02-07 | Last Revised: 2006-02-09


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


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.


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


This issue is fixed in Firefox 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.

Vendor Information


Mozilla, Inc. Affected

Updated:  February 07, 2006



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Please see

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Red Hat, Inc. Not Affected

Updated:  February 09, 2006


Not Affected

Vendor Statement

Vendor statement, Red Hat Inc: Not vulnerable. No Red Hat products contain Firefox 1.5.

Vendor statement, Fedora Project: Not vulnerable. No Fedora products contain Firefox 1.5.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

CVSS Metrics

Group Score Vector



These vulnerabilities were reported by Georgi Guninski.

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2006-0295
Severity Metric: 15.46
Date Public: 2006-02-02
Date First Published: 2006-02-07
Date Last Updated: 2006-02-09 19:10 UTC
Document Revision: 38

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