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Apple QuickTime Panorama Sample Atom Heap Buffer Overflow Vulnerability

11.05.07

BACKGROUND

QuickTime is Apple's media player product used to render video and other media. For more information visit http://www.apple.com/quicktime/

QuickTime VR (virtual reality) is a type of image file format supported by Apple's QuickTime. It allows the creation and viewing of photographically captured panoramas and the exploration of objects through images taken at multiple viewing angles.

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

DESCRIPTION

Remote exploitation of a heap overflow 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 QuickTime Player's handling of Panorama Sample atoms in QuickTime Virtual Reality movie. When processing panorama sample atoms, the size field in the atom header is not validated. QuickTime will copy the specified amount of memory to a fixed-size heap buffer, causing heap corruption.

ANALYSIS

Exploitation could allow attackers to execute arbitrary code in the context of the current user. To exploit this vulnerability, an attacker must persuade a user into using QuickTime to open a specially crafted QuickTime movie file. This could be accomplished by persuading the user to click a direct link to a malicious VR movie file. Additionally, this vulnerability could be exploited within a malicious web page.

DETECTION

iDefense Labs confirmed this vulnerability exists in QuickTime VR extension 7.2.0.240 as included in QuickTime Player 7.2. Previous versions are suspected to be vulnerable.

WORKAROUND

Disabling the QuickTime plug-in for browsers can mitigate Web page attack vectors. To do this, uncheck the "Play movies automatically" setting within the QuickTime preferences Browser->Playback tab.

VENDOR RESPONSE

Apple has released QuickTime 7.3 which resolves this issue. More information is available via Apple's QuickTime Security Update page at the URL shown below.

http://docs.info.apple.com/article.html?artnum=306896

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-4675 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

09/13/2007 Initial vendor notification
09/13/2007 Initial vendor response
11/05/2007 Coordinated public disclosure

CREDIT

This vulnerability was reported to VeriSign iDefense by Mario Ballano from 48bits.com.

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LEGAL NOTICES

Copyright © 2007 Verisign, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.