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Date: Mon, 09 Apr 2012 10:42:32 -0400
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: ZDI-12-058 : Apple Quicktime PNG Depth Decoding
 Remote Code Execution Vulnerability


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ZDI-12-058 : Apple Quicktime PNG Depth Decoding Remote Code Execution
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-12-058

April  9, 2012

- -- CVE ID:
CVE-2011-3460

- -- 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 AppleQuickTime 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 occurs when the application allocates space for
decoding a video sample encoded with the .png format. When calculating
space for this surface, the application will explicitly trust the
bit-depth within the MediaVideo header. During the decoding process, the
application will write outside the surface's boundaries. This can be
leveraged to allow for one to earn code execution under the context of
the application.

- -- Vendor Response:

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

http://support.apple.com/kb/HT5130




- -- Disclosure Timeline:
2011-10-21 - Vulnerability reported to vendor

2012-04-09 - Coordinated public release of advisory



- -- Credit:
This vulnerability was discovered by:

* Luigi Auriemma



- -- 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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