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Zero Day Initiative Advisory 11-276

Zero Day Initiative Advisory 11-276
Posted Aug 24, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-276 - 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.

tags | advisory, remote, arbitrary
advisories | CVE-2011-2140
SHA-256 | e08b070091b795f87e546046e1c9d63568234479f3355f09c72d4b6d11889cbd

Zero Day Initiative Advisory 11-276

Change Mirror Download
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

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:
http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:
http://twitter.com/thezdi

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