Apple QuickTime FPX Integer Overflow

Release Date:
May 11, 2006

Date Reported:
March 7, 2006

Patch Development Time (In Days):
65     

Severity:
High (Remote Code Execution)

Vendor:
Apple

Systems Affected:
Quicktime on Windows 2000
Quicktime on Windows XP
Quicktime on Mac OS X 10.3.9

References:
This vulnerability has been assigned CVE-2006-1249

Overview:
eEye Digital Security has discovered a critical vulnerability in
QuickTime Player. There is a integer overflow in the way QuickTime
processes fpx format files. An attacker can create a fpx file and send
it to the user via email, web page, or fpx file with activex.

Technical Description:
In an fpx file, there is a field that figures out how many blocks of
data there are in that file. One block data size is 0x200, QuickTime
Player will allocate memory relying on (number*0x200) but does not check
the size value and an integer overflow can occur.  If you set the block
value to 0x800000 an integer overflow will occur which will then cause a
heap overflow and write invalid memory.  

QuickTime: QuickTime File Format
http://developer.apple.com/documentation/QuickTime/QTFF/index.html

Protection:
Retina Network Security Scanner has been updated to identify this
vulnerability.
Blink - Endpoint Vulnerability Prevention - preemptively protects from
this vulnerability.

Vendor Status:
Apple has released a patch for this vulnerability information is
available at  http://docs.info.apple.com/article.html?artnum=61798

Credit:
Discovery: Fang Xing

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