TippingPoint Zero Day Initiative

Mozilla Firefox XMLSerializer Use-After-Free Remote Code Execution Vulnerability

ZDI-13-006: February 1st, 2013


CVSS Score

Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the XML serialization of the DOM. A certain method used during serialization is provided by the user and can be made to create a dangling pointer. By abusing this behavior an attacker can ensure this memory is under control and leverage the situation to achieve remote code execution under the context of the user running the browser.

Vendor Response

Mozilla has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2012-11-21 - Vulnerability reported to vendor
    2013-02-01 - Coordinated public release of advisory


This vulnerability was discovered by: