Vulnerability Note VU#911004
Mozilla Firefox fails to properly handle the "XPCNativeWrapper(window).Function(...)"
OverviewCertain Mozilla products contain a cross-site scripting vulnerability because of a vulnerability in the XPCNativeWrapper function.
I. DescriptionXPCNativeWrapper
Per Mozilla, XPCNativeWrapper is a way to wrap up an object so that it is safe to access from privileged code. It is used to allow chrome code to access DOM objects.
The Problem
An attacker can use the XPCNativeWrapper function to inject script into a browser window that may be in a different domain. This violates the Netscape same-origin policy.
II. ImpactBy convincing a victim to view an HTML document (web page), an attacker could evaluate script in a different security domain than the one containing the attacker's document. The attacker could read or modify data in other web sites (read cookies/content, modify/create content, etc.). If the script is evaluated with chrome privileges, an attacker could execute arbitrary commands on the user's system.
III. SolutionUpgrade
This issue is addressed in the 1.5.0.5 updates to Mozilla Firefox and Thunderbird, and the 1.0.3 version of Seamonkey. Refer to Mozilla Foundation Security Advisory 2006-54 for more details.
Disable JavaScript
For instructions on how to disable JavaScript in Firefox, please refer to the Firefox section of the Securing Your Web Browser document. JavaScript is not enabled by default in Mozilla Thunderbird.
Systems Affected
| Vendor | Status | Date Notified | Date Updated |
|---|
| Mozilla, Inc. | Vulnerable | 1-Aug-2006 |
References
http://www.mozilla.org/security/announce/2006/mfsa2006-54.html
https://bugzilla.mozilla.org/show_bug.cgi?id=338523
http://secunia.com/advisories/19873/
http://secunia.com/advisories/21216/
http://www.securityfocus.com/bid/19181
Credit
Thanks to Mozilla for reporting this vulnerability. Mozilla in turn thanks shutdown.
This document was written by Ryan Giobbi.
Other Information
| Date Public: | 2006-07-25 |
| Date First Published: | 2006-08-01 |
| Date Last Updated: | 2007-02-09 |
| CERT Advisory: | |
| CVE-ID(s): | CVE-2006-3810 |
| NVD-ID(s): | CVE-2006-3810 |
| US-CERT Technical Alerts: | |
| Metric: | 2.74 |
| Document Revision: | 14 |
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