TippingPoint Zero Day Initiative

Apple QuickTime STSZ Atom Parsing Heap Corruption Vulnerability

ZDI-08-059: September 9th, 2008


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6148. For further product information on the TippingPoint IPS:

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 in the handling of STSZ atoms within the function CallComponentFunctionWithStorage(). When an entry in the sample_size_table is too large, a memory corruption occurs which can be further leveraged to execute arbitrary code under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2008-05-15 - Vulnerability reported to vendor
    2008-09-09 - Coordinated public release of advisory


This vulnerability was discovered by: