Advisory Details

August 16th, 2011

Apple QuickTime STSZ atom Parsing Remote Code Execution Vulnerability

ZDI-11-259
ZDI-CAN-1162

CVE ID CVE-2011-0251
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Apple
AFFECTED PRODUCTS Quicktime
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11558. 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 visit a malicious page or open a malicious file.

The specific flaw exists within the way Quicktime handles corrupt Sample Size atoms. When the value for 'Number of Entries' in this atom differs from the 'Number of Entries' in the Time-To-Sample atom, Quicktime will fill the Atom Sample Table with uninitialized data read from memory. This can later on result in a heap overflow when the data is used to calculate a loop counter to fill a heap buffer.

ADDITIONAL DETAILS 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
  • 2011-08-16 - Coordinated public release of advisory
CREDIT Matt "j00ru" Jurczyk
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