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Adobe Shockwave Director rcsL Chunk Pointer Offset Remote Code Execution

Adobe Shockwave Director rcsL Chunk Pointer Offset Remote Code Execution
Posted Aug 26, 2010
Authored by Aaron Portnoy, Logan Brown | Site dvlabs.tippingpoint.com

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.

tags | advisory, remote, web, arbitrary
advisories | CVE-2010-2867
MD5 | 96d9afaf64e2fd149b9f8514366fefeb

Adobe Shockwave Director rcsL Chunk Pointer Offset Remote Code Execution

Change Mirror Download
TPTI-10-14: Adobe Shockwave Director rcsL Chunk Pointer Offset Remote Code Execution Vulnerability
http://dvlabs.tippingpoint.com/advisory/TPTI-10-14
August 24, 2010

-- CVE ID:
CVE-2010-2867

-- Affected Vendors:
Adobe

-- Affected Products:
Adobe Shockwave Player

-- 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:

http://www.adobe.com/support/security/bulletins/apsb10-20.html

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

-- Credit:
This vulnerability was discovered by:
* TippingPoint FuzzBox as driven by Aaron Portnoy and Logan Brown
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