ZDI-09-025: Apple Quicktime Picture Viewer FLC Delta-Encoded Frame Decompression Vulnerability

[ZDI Disclosures <zdi-disclosures@xxxxxxxxxxxxxxxx>]

ZDI-09-025: Apple Quicktime Picture Viewer FLC Delta-Encoded Frame
Decompression Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-025
June 2, 2009

-- CVE ID:
CVE-2009-0951

-- 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 6570.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of QuickTime Player. User interaction is
required to exploit this vulnerability in that the target must either
open a malicious file, or visit a malicious web page.

The specific flaw exists during decompression of a delta-encoded chunk.
The algorithm to decompress the frame trusts a line specifier when
calculating where to write decompressed data. This results in a relative
write using attacker supplied values which can lead to remove 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/HT3591

-- Disclosure Timeline:
2008-10-28 - Vulnerability reported to vendor
2009-06-02 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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