TippingPoint Zero Day Initiative

Microsoft DirectShow Quicktime Atom Parsing Memory Corruption Vulnerability

ZDI-09-045: July 14th, 2009


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8307. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. User interaction is required in that a target must visit a malicious page or open a malicious video file.

The specific flaw exists within the parsing of the length records of certain QuickTime atoms. The application implicitly trusts the length during a transformation which will lead to memory corruption and can be leveraged to execute arbitrary code under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2008-09-23 - Vulnerability reported to vendor
    2009-07-14 - Coordinated public release of advisory


This vulnerability was discovered by: