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Mozilla XML.prototype.hasOwnProperty() method memory corruption vulnerability

Vulnerability Note VU#815432

Original Release Date: 2006-11-08 | Last Revised: 2006-12-21


Mozilla products fail to properly handle the XML.prototype.hasOwnProperty() method. This vulnerability may allow a remote attacker execute arbitrary code.


The ECMAScript for XML (E4X) Specification defines the XML.prototype.hasOwnProperty() as a JavaScript method used to determine if an object contains a specific property. Mozilla products fail to properly handle the XML.prototype.hasOwnProperty() method, which can lead to memory corruption.

For more information refer to Mozilla Foundation Security Advisory 2006-65.


A remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. The attacker could also cause the vulnerable application to crash.


Apply an update

According to the Mozilla Foundation Security Update 2006-65, this vulnerability is addressed in Firefox, Thunderbird, and SeaMonkey 1.0.6.

Note that according to Mozilla:

Firefox 1.5.0.x will be maintained with security and stability updates until April 24, 2007. All users are strongly encouraged to upgrade to Firefox 2.

Disable JavaScript

This vulnerability can be mitigated by disabling JavaScript.

Vendor Information


Mozilla Affected

Updated:  November 08, 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.


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This vulnerability was reported in Mozilla Foundation Security Advisory 2006-65. Mozilla credits shutdown for providing information concerning this issue.

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2006-5747
Severity Metric: 14.45
Date Public: 2006-11-08
Date First Published: 2006-11-08
Date Last Updated: 2006-12-21 18:52 UTC
Document Revision: 37

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