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Zero Day Initiative Advisory 11-315

Zero Day Initiative Advisory 11-315
Posted Oct 27, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-315 - 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 Quicktime decodes flic file. Flic files can contain FLC Delta Decompression block containing Run Length Encoded data. Quicktime fails to correctly checking the decompression size when decoding the RLE data. This allows for a 4 byte overwrite past the end of the buffer which could result into remote code execution under the context of the current user.

tags | advisory, remote, arbitrary, code execution
systems | apple
advisories | CVE-2011-3249
MD5 | cf25d840505350633407351120274590

Zero Day Initiative Advisory 11-315

Change Mirror Download
ZDI-11-315 : Apple QuickTime FLC Delta Decompression Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-11-315
October 27, 2011

-- CVE ID:
CVE-2011-3249

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

-- 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 Quicktime decodes flic file.
Flic files can contain FLC Delta Decompression block containing Run
Length Encoded data. Quicktime fails to correctly checking the
decompression size when decoding the RLE data. This allowes for a 4 byte
overwrite past the end of the buffer which could result into remote code
execution under the context of the current user.

-- Vendor Response:

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

http://support.apple.com/kb/HT5016



-- Disclosure Timeline:
2011-06-03 - Vulnerability reported to vendor
2011-10-27 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:

* Matt "j00ru" Jurczyk



-- 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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