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TUCoPS :: Apple(multi) :: bt-21628.htm

Apple QuickTime FlashPix Sector Size Overflow Vulnerability



ZDI-09-064: Apple QuickTime FlashPix Sector Size Overflow Vulnerability
ZDI-09-064: Apple QuickTime FlashPix Sector Size Overflow Vulnerability



ZDI-09-064: Apple QuickTime FlashPix Sector Size Overflow Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-064 
September 10, 2009

-- CVE ID:
CVE-2009-2798

-- 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 8414.
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 during the parsing of malformed FlashPix (.fpx)
files. While parsing the SectorShift and cSectFat fields from the
header, the application will multiply 2 user-controlled 32-bit values
and utilize this for an allocation. If the result of the multiplication
is greater than 32bits, the application will allocate an undersized heap
chunk. Later, the application will copy file data directly into this
buffer leading to a buffer overflow which can allow for code execution
under the context of the currently logged in user.

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

http://support.apple.com/kb/HT3859 

-- Disclosure Timeline:
2009-07-28 - Vulnerability reported to vendor
2009-09-10 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Damian Put

-- 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/ 



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