Advisory Details

October 27th, 2011

Apple QuickTime FLC Delta Decompression Remote Code Execution Vulnerability

ZDI-11-315
ZDI-CAN-1275

CVE ID CVE-2011-3249
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Apple
AFFECTED PRODUCTS Quicktime
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 decodes flic file. Flic files can contain FLC Delta Decompression block containing Run Length Encoded data. Quicktime fails to correctly checking the decompression size when decoding the RLE data. This allowes for a 4 byte overwrite past the end of the buffer which could result into remote code execution under the context of the current user.

ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
http://support.apple.com/kb/HT5016
DISCLOSURE TIMELINE
  • 2011-06-03 - Vulnerability reported to vendor
  • 2011-10-27 - Coordinated public release of advisory
CREDIT Matt "j00ru" Jurczyk
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