ZDI-11-259: Apple QuickTime STSZ atom Parsing Remote Code Execution Vulnerability
August 16, 2011
-- CVE ID: CVE-2011-0251
-- CVSS: 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
-- Affected Vendors: Apple
-- Affected Products: Apple QuickTime
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-- 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.
-- Vendor Response: 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: This vulnerability was discovered by: * Matt "j00ru" Jurczyk
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