TippingPoint Zero Day Initiative

Mozilla Firefox Cross Document DOM Node Moving Remote Code Execution Vulnerability

ZDI-10-063: April 5th, 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 9666. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to bypass specific script execution enforcements on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists when moving DOM nodes in between documents with a specific timing while triggering garbage collection. If timed correctly Firefox will incorrectly reference a previously freed object which can be leveraged by an attacker to execute arbitrary code under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2010-03-26 - Vulnerability reported to vendor
    2010-04-05 - Coordinated public release of advisory


This vulnerability was discovered by:
    Nils of MWR InfoSecurity (http://twitter.com/MWRlabs)