Vulnerability Note VU#575969

Overview

Mozilla allows content-defined setters on object prototypes to execute with elevated privileges. This may allow a remote attacker to execute arbitrary code.

Description

Setters A setter is a method in JavaScript that sets the value of a property. The problem The setters in Mozilla are called by privileged user interface (UI) code. This elevated privilege can be passed on to the content-provided JavaScript code. Mozilla Firefox and Thunderbird are reported to be vulnerable.

Impact

The complete impact of this vulnerability is not yet known.

Solution

Apply an update Refer to Mozilla Foundation Security Advisory 2006-37 for fixed versions of Mozilla products.

Disable JavaScript This vulnerability can be mitigated by disabling JavaScript.

Systems Affected (Learn More)

Vendor	Status	Date Notified	Date Updated
Mozilla, Inc.	Affected	-	02 Jun 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/mfsa2006-37.html
• https://bugzilla.mozilla.org/show_bug.cgi?id=330773
• http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Guide:Creating_New_Objects:Defining_Getters_and_Setters
• http://www.securityfocus.com/bid/18228

Credit

Thanks to the Mozilla Foundation Security Advisory for reporting this vulnerability, who in turn credit Paul Nickerson and moz_bug_r_a4.

This document was written by Will Dormann.

Other Information

• CVE IDs: CVE-2006-2776
• Date Public: 01 Jun 2006
• Date First Published: 02 Jun 2006
• Date Last Updated: 09 Feb 2007
• Severity Metric: 11.48
• Document Revision: 13