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Adobe Shockwave Director rcsL Chunk Pointer Offset Remote Code Execution Vulnerability

TPTI-10-14: August 24th, 2010


Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of 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 code responsible for parsing the Director RIFF based file format. While handling the rcsL chunk, code within DIRAPIX sign-extends a return value from a call to Ordinal1412 within the IML32X module. This ordinal is responsible for unmarshalling a WORD value from the RIFF chunk. If the value is signed, DIRAPIX sign-extends the value, performs arithmetic on it, and then proceeds to use it as an offset into a heap-based buffer. By supplying any of a specific range of values, an attacker can exploit this condition to execute arbitrary code under the context of the user running the web browser.

Vendor Response

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

Disclosure Timeline

    2010-05-27 - Vulnerability reported to vendor
    2010-08-24 - Coordinated public release of advisory


This vulnerability was discovered by: