TippingPoint Zero Day Initiative

Adobe Reader u3d Parent Node Count Remote Code Execution Vulnerability

ZDI-11-074: February 8th, 2011


CVSS Score

Affected Vendors

Affected Products

Vulnerability Details

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

The flaw exists within the U3D component distributed with the Reader. The application uses the Parent Node count to calculate the size of an allocation. This value is not properly validated and the result of this size calculation can be wrapped to an unexpectedly small and insufficient value. Writes to this newly allocated buffer can be outside the bounds of its allocation. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the application.

Vendor Response

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

Disclosure Timeline

    2010-11-15 - Vulnerability reported to vendor
    2011-02-08 - Coordinated public release of advisory


This vulnerability was discovered by: