TippingPoint Zero Day Initiative

Apple Quicktime PnPixPat PatType 3 Parsing Remote Code Execution Vulnerability

ZDI-11-314: October 27th, 2011


CVSS Score

Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple's QuickTime Player. 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 how the application parses a specific opcode within a PCT file. When resizing a heap buffer, the application will use a signed word read from the file to calculate the resulting size. This can be used to force the target buffer to be of an undersized length. Usage of this buffer will result in a buffer overflow in the context of the application.

Vendor Response

Apple has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2011-04-11 - Vulnerability reported to vendor
    2011-10-27 - Coordinated public release of advisory


This vulnerability was discovered by:
    Luigi Auriemma