Advisory Details

February 7th, 2011

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

ZDI-11-043
ZDI-CAN-798

CVE ID CVE-2011-0977
CVSS SCORE 10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office PowerPoint
Office Excel
Office Word
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: http://www.tippingpoint.com
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
http://www.microsoft.com/technet/security/Bulletin/MS11-023.mspx


DISCLOSURE TIMELINE
  • 2010-06-30 - Vulnerability reported to vendor
  • 2011-02-07 - Coordinated public release of advisory
CREDIT Anonymous
Aniway (Aniway.Anyway AT gmail DOT com)
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