ZDI-11-230: Apple Quicktime Apple Lossless Audio Codec Parsing Remote Code Execution Vulnerability

ZDI-11-230: Apple Quicktime Apple Lossless Audio Codec Parsing Remote Code Execution
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-230

June 29, 2011

– CVE ID:
CVE-2011-0211

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

– Affected Vendors:
Apple

– Affected Products:
Apple Quicktime

– TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11428.
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 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 handles Apple Lossless
Audio Codec streams. While parsing the sample description for the 'alac'
codec an integer wrap can occur that results in the allocation of a
memory buffer that is smaller than intended. When Quicktime writes to
this buffer it causes a memory corruption that can lead to 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/HT4723

– Disclosure Timeline:
2011-04-11 - Vulnerability reported to vendor
2011-06-29 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* Luigi Auriemma
* Damian Put

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