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Zero Day Initiative Advisory 12-135

Zero Day Initiative Advisory 12-135
Posted Aug 3, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-135 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple QuickTime. 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 way Apple QuickTime handles movies with the jpeg2k codec. When the size for a sample defined in the stsz atom is too big the QuickTime player fails to allocate the required memory for that sample. A pointer to the previous sample data still exists after the previous sample got freed. This pointer normally gets updated to point to the current sample data, but this does not happen when the allocation fails. The QuickTime player then re-uses the stale pointer and a use-after-free situation occurs. This can lead to remote code execution under that context of the current process.

tags | advisory, remote, arbitrary, code execution
systems | apple
advisories | CVE-2012-0661
MD5 | a3c9630afd77f3911b82c081120f46a0

Zero Day Initiative Advisory 12-135

Change Mirror Download
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ZDI-12-135 : Apple QuickTime JPEG2k Sample Size Atom Remote Code Execution
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-135
August 3, 2012

- -- CVE ID:
CVE-2012-0661

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

- -- Affected Vendors:
Apple

- -- Affected Products:
Apple QuickTime

- -- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Apple QuickTime. 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 way Apple QuickTime handles movies with
the jpeg2k codec. When the size for a sample defined in the stsz atom is
too big the QuickTime player fails to allocate the required memory for that
sample. A pointer to the previous sample data still exists after the
previous sample got freed. This pointer normally gets updated to point to
the current sample data, but this does not happen when the allocation
fails. The QuickTime player then re-uses the stale pointer and a
use-after-free situation occurs. This can lead to remote code execution
under that context of the current process.

- -- Vendor Response:
Apple has issued an update to correct this vulnerability. More details can
be found at:

http://support.apple.com/kb/HT1222


- -- Disclosure Timeline:
2011-11-29 - Vulnerability reported to vendor
2012-08-03 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:
* Damian Put

- -- 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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