ZDI-07-065: Apple QuickTime Color Table RGB Parsing Heap Corruption Vulnerability

[zdi-disclosures () 3com com]

ZDI-07-065: Apple QuickTime Color Table RGB Parsing Heap Corruption 
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-07-065.html
November  5, 2007

-- CVE ID:
CVE-2007-4677

-- Affected Vendor:
Apple

-- Affected Products:
QuickTime 7.2

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 5610. 
For further product information on the TippingPoint IPS:

    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 open a
malicious file. 

The specific flaw exists in the parsing of the CTAB atom. While reading
the CTAB RGB values, an invalid color table size can cause QuickTime to
write past the end of the heap chunk. This memory corruption can lead
to the execution of arbitrary code.

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

http://docs.info.apple.com/article.html?artnum=306896

-- Disclosure Timeline:
2007.09.14 - Vulnerability reported to vendor
2007.11.05 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Ruben Santamarta of reversemode.com 
and
Mario Ballano of 48bits.com.

-- About the Zero Day Initiative (ZDI):
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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.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com 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, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.

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