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Adobe Shockwave tSAC Chunk Pointer Offset Memory Corruption Remote Code Execution Vulnerability

TPTI-10-11: 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 DIRAPIX.dll which is responsible for parsing the Director movies, a RIFF-based file format. The code sign-extends a value from the input file and uses it as an offset to seek into a heap buffer before performing a write operation. By crafting particular values for this field, an attacker can force the process to seek beyond the allocated bounds of the buffer. This can be leveraged by an attacker 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

    2010-08-11 - Vulnerability reported to vendor
    2010-08-24 - Coordinated public release of advisory


This vulnerability was discovered by: