TippingPoint Zero Day Initiative

Mozilla Firefox XSLT Sort Remote Code Execution Vulnerability

ZDI-10-113: June 23rd, 2010


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9910. For further product information on the TippingPoint IPS:

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 otherwise render a malicious file.

The specific flaw exists within a particular XSLT transformation when applied to an XML document. If a large number of elements have this transformation applied to them, the application will misallocate a buffer. Upon usage of this buffer the application will copy more data than allocated thus causing an overflow. This can lead to code execution under the context of the application.

Vendor Response

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

Disclosure Timeline

    2010-03-22 - Vulnerability reported to vendor
    2010-06-23 - Coordinated public release of advisory


This vulnerability was discovered by:
    Martin Barbella