Vulnerability Note VU#866300

Overview

Mozilla Firefox contains a deleted object reference vulnerability. This may allow a remote attacker to execute arbitrary code.

Description

Mozilla Firefox contains a vulnerability that causes a deleted object to be referenced when designMode is set to "on." When Firefox attempts to use this deleted object, the browser can crash. It may be possible to execute arbitrary code by using references to deleted objects.

Impact

A remote, unauthenticated attacker may be able to execute arbitrary code with the privileges of the user running Firefox.

Solution

Apply an update Update to Firefox 1.5.0.3, as specified in Mozilla Foundation Security Advisory 2006-30.

Disable scripting This vulnerability can be mitigated by disabling JavaScript.

Systems Affected (Learn More)

Vendor	Status	Date Notified	Date Updated
Mozilla, Inc.	Affected	-	02 May 2006
Red Hat, Inc.	Not Affected	-	18 May 2006

If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group	Score	Vector
Base	N/A	N/A
Temporal	N/A	N/A
Environmental	N/A	N/A

References

• http://www.mozilla.org/security/announce/2006/mfsa2006-30.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=334515
• http://www.securident.com/vuln/ff.txt
• http://secunia.com/advisories/19802/
• http://www.securityfocus.com/bid/17671
• http://securitytracker.com/id?1015981

Credit

This vulnerability was publicly disclosed by splices. Mozilla also credits Martijn Wargers and Nick Mott.

This document was written by Will Dormann.

Other Information

• CVE IDs: CVE-2006-1993
• Date Public: 24 Apr 2006
• Date First Published: 02 May 2006
• Date Last Updated: 18 May 2006
• Severity Metric: 7.87
• Document Revision: 16