TippingPoint Zero Day Initiative

Microsoft Cinepak Codec CVDecompress Remote Code Execution Vulnerability

ZDI-10-148: August 10th, 2010


CVSS Score

Affected Vendors

Affected Products

    File Format Vulnerability

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10135. 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 to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the iccvid.dll module responsible for compression and decompression of VIDC (Cinepak) streams. The code within CVDecompress allocates a static amount of space for storing an RGB palette. By modifying a VIDC compressed stream within an AVI file, an attacker can force code within iccvid to loop excessively, each time incrementing the pointer for the palette storage. By abusing this behavior an attacker can execute arbitrary code under the context of the user invoking the application that uses this codec.

Vendor Response

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

Disclosure Timeline

    2010-04-13 - Vulnerability reported to vendor
    2010-08-10 - Coordinated public release of advisory


This vulnerability was discovered by: