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Adobe Shockwave GIF Logical Screen Descriptor Parsing Remote Code Execution Vulnerability

TPTI-11-04: February 8th, 2011


Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of the Adobe Shockwave Player. 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 IML32 module distributed with the player. While parsing GIF files within a director movie (.dir or .dcr) the code trusts the specified size of the global color table and uses it to determine an offset to image data. The process subsequently attempts to write two NULL bytes to the calculated address. A remote attacker can abuse this logic to corrupt memory at a controlled location and subsequently execute arbitrary code under the context of the user running 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: