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Apple QuickTime PICT Integer Overflow Vulnerability

09.09.08

BACKGROUND

Quicktime is Apple's media player product, and is used to render video and other media. The PICT file format was developed by Apple Inc. in 1984. PICT files can contain both object oriented images and bitmaps. For more information visit the vendor's web site at the following URL.

http://www.apple.com/quicktime/

DESCRIPTION

Remote exploitation of an integer overflow in Apple Inc.'s QuickTime could allow an attacker to execute arbitrary code in the security context of the current user.

QuickTime is vulnerable to an integer overflow vulnerability when handling malformed PICT files. This issue results in heap corruption which can lead to arbitrary code execution.

ANALYSIS

Exploitation of this issue results in arbitrary code execution in the security context of the current user. An attacker would need to host a web page containing a malformed PICT file. Upon visiting the malicious web page exploitation would occur. Alternatively a malicious PICT file could be attached to an e-mail.

DETECTION

Apple Inc.'s QuickTime versions 7.4.5 and 7.4 have been confirmed to be vulnerable to this issue. Older versions are also suspected to be vulnerable.

WORKAROUND

iDefense recommends disabling the QuickTime Plug-in and altering the .pic and .pict file type associations within the registry. Disabling the plug-in will prevent web browsers from utilizing QuickTime Player to view associated media files. Removing the file type associations within the registry will prevent QuickTime Player and Picture Viewer from opening .pic and .pict files.

VENDOR RESPONSE

Apple has released QuickTime 7.5.5 which resolves this issue. More information is available via Apple's QuickTime Security Update page at the URL shown below.

http://support.apple.com/kb/HT3027

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-3614 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

05/13/2008 Initial vendor notification
05/22/2008 Initial vendor response
09/09/2008 Coordinated public disclosure

CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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LEGAL NOTICES

Copyright © 2008 Verisign, Inc.

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