ZDI-11-276: Adobe Flash Player MP4 sequenceParameterSetNALUnit Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-276

August 23, 2011

-- CVE ID:
CVE-2011-2140

-- CVSS:
7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)

-- Affected Vendors:
Adobe

-- Affected Products:
Adobe Flash Player

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11164. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Adobe Flash Player. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The flaw exists within the sequenceParameterSetNALUnit component. When
handling the num_ref_frames_in_pic_order_cnt_cycle value the size is not
validated and the process blindly copies user supplied data from
offset_for_ref_frame into a fixed-length buffer on the stack. A remote
attacker can exploit this vulnerability to execute arbitrary code under
the context of the 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/apsb11-21.html

-- Disclosure Timeline:
2011-02-10 - Vulnerability reported to vendor
2011-08-23 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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