[Full-disclosure] ZDI-11-251: Apple QuickTime STSS atom Parsing Remote Code Execution Vulnerability

[ZDI Disclosures <zdi-disclosures@xxxxxxxxxxxxxxxx>]

ZDI-11-251: Apple QuickTime STSS atom Parsing Remote Code Execution 
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-251

August 9, 2011

-- CVE ID:
CVE-2011-0250

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

-- 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 11218. 
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 invalid values
in the Sync Sample Atom. Due to a signed compare instead of an unsigned
compare it is possible to corrupt the Sample Atom Table. Values from
this table are later used to populate a heap buffer and the corrupted
value causes a heap overflow. This can result in 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/HT4826

-- Disclosure Timeline:
2011-04-11 - Vulnerability reported to vendor
2011-08-09 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Matt "j00ru" Jurczyk

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