Vulnerability Note VU#243153

Mozilla may associate persisted XUL attributes with an incorrect URL

Overview

Mozilla can allow persisted XUL attributes to associate with the wrong URL. This may allow a remote attacker to execute arbitrary code.

I. Description

XUL

XUL is an XML-based user interface language, which is used by Mozilla.

Persisted XUL

XUL elements with the persist attribute maintain their values after the window is closed. These values are stored in the localstore.rdf file.

The problem

Some persisted XUL attributes can be associated with the wrong URL. Mozilla Firefox and Thunderbird are reported to be vulnerable.

II. Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page, an HTML email message, or an HTML email attachment), an attacker may be able to execute arbitrary code with the privileges of the user.

III. Solution

Apply an update

Refer to Mozilla Foundation Security Advisory 2006-35 for fixed versions of Mozilla products.

Disable JavaScript

This vulnerability can be mitigated by disabling JavaScript.

Systems Affected

Vendor	Status	Date Updated
Mozilla, Inc.	Vulnerable	2-Jun-2006

References

http://www.mozilla.org/security/announce/2006/mfsa2006-35.html
https://bugzilla.mozilla.org/show_bug.cgi?id=329677
http://www.mozilla.org/projects/xul/
http://www.mozilla.org/xpfe/xulref/common.html#persist
http://www.securityfocus.com/bid/18228

Credit

Thanks to Mozilla Foundation Security Advisory for reporting this vulnerability, who in turn credit Jonas Sicking.

This document was written by Will Dormann.

Other Information

Date Public	06/01/2006
Date First Published	06/02/2006 11:34:22 AM
Date Last Updated	02/09/2007
CERT Advisory
CVE Name	CVE-2006-2775
US-CERT Technical Alerts
Metric	11.48
Document Revision	14

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Produced 2006 by US-CERT, a government organization
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