TippingPoint Zero Day Initiative

(0day) Microsoft Office Drawing Object Remote Code Execution Vulnerability

ZDI-11-043: February 7th, 2011


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10818. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Excel 2007. 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 application's support for the office drawing file format. When parsing shape data within a particular container, the application will add a reference to an object to a linked list. If an error occurs during parsing, the application will free each element yet fail to remove the reference. Afterward, the application will use this reference. This can lead to code execution under the context of the application.

Vendor Response

Microsoft states:

Patched April 12, 2011

Disclosure Timeline

    2010-06-30 - Vulnerability reported to vendor
    2011-02-07 - Coordinated public release of advisory


This vulnerability was discovered by:
    Aniway (Aniway.Anyway AT gmail DOT com)