Apple Quicktime PICT File PackBitsRgn Parsing Heap Corruption Vulnerability

November 5th, 2007
ZDI-07-066 ZDI-CAN-240

CVE ID

CVE-2007-4676

CVSS Score

None None

Affected Vendors

Apple

Affected Products

Quicktime

Vulnerability Details

This vulnerability allows 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 exist in the parsing of the PackBitsRgn field (Opcode 0x0099). Due to improper handling of a malformed element in the structure, heap corruption occurs. If properly constructed this can lead to code execution running under the credentials of the user.

Additional Details

Apple has issued an update to correct this vulnerability. More details can be found at:
http://docs.info.apple.com/article.html?artnum=306896

Disclosure Timeline

  • 2007-09-14 - Vulnerability reported to vendor
  • 2007-11-05 - Coordinated public release of advisory

Credit

Ruben Santamarta of reversemode.com

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