Apple QuickTime PICT Memory Corruption Vulnerability
QuickTime is Apple's media player product 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 http://www.apple.com/quicktime/
Remote exploitation of a memory corruption vulnerability in Apple Inc.'s QuickTime media player could allow attackers to execute arbitrary code in the context of the targeted user.
The vulnerability specifically exists in the way specially crafted PICT image files are handled by the QuickTime PictureViewer.
When processing specially crafted PICT image files, Quicktime PictureViewer uses a set value from the file to control the length of a byte swap operation. The byte swap operation is used to convert big endian data to little endian data. QuickTime fails to validate the length value properly before using it. When a length value is larger than the actual buffer size supplied, it will corrupt heap memory beyond the allocated buffer, which could lead to an exploitable condition.
Successful exploitation could allow attackers to execute arbitrary code in the context of the current user. To exploit this vulnerability, an attacker must persuade a victim into using QuickTime to open a specially crafted PICT picture file. This could be accomplished by either direct link or referenced from a website under the attacker's control. An attacker could host a Web page containing a malformed PICT file. Upon visiting the malicious Web page exploitation would occur and execution of arbitrary code would be possible. Alternatively a PICT file could be attached within an e-mail file.
QuickTime Player versions prior to 7.6.9 are vulnerable.
iDefense recommends disabling the QuickTime Plugin and altering the .pct, .pic and .pict filetype associations within the registry. Disabling the plugin will prevent Web browsers from utilizing QuickTime Player to view associated media files. Removing the filetype associations within the registry will prevent QuickTime Player and Picture Viewer from opening .pct, .pic and .pict files.
Apple Inc. has released patches which addresses this issue. For more information, consult their advisory at the following URL:
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2010-3800 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
03/31/2010 Initial Vendor Notification
03/31/2010 Initial Vendor Reply
12/07/2010 Coordinated Public Disclosure
This vulnerability was reported to iDefense by Hossein Lotfi (s0lute).
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Copyright © 2010 Verisign, Inc.
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