Apple iTunes (QuickTime.qts) Heap Overflow

Credit: Karl Lynn
Risk: High
Local: Yes
Remote: Yes
CWE: CWE-119

CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

EEYEB-20051117B Apple iTunes (QuickTime.qts) Heap Overflow Release Date: January 10, 2006 Date Reported: November 17, 2005 Patch Development Time (In Days): 54 Days Severity: High (Code Execution) Vendor: Apple Systems Affected: Quicktime on Windows 2000 Quicktime on Windows XP Quicktime on Mac OS X 10.3.9 Apple iTunes on Windows 2000 Apple iTunes on Windows XP Apple iTunes on OS X 10.3.9 Overview: eEye Digital Security has discovered a critical vulnerability in Apple iTunes. The vulnerability allows an attacker to reliably overwrite heap memory with user-controlled data and execute arbitrary code in the context of the user who executed iTunes. This specific flaw exists within the QuickTime.qts file which many applications access QuickTime's functionality through. By specially crafting atoms within a movie file, a direct heap overwrite is triggered, and reliable code execution is then possible. Technical Details: The code in QuickTime.qts responsible for copying Movie Resource atom type sizes in a QuickTime-format movie into an array allocated on the heap. According to, the format of the Movie Resource atom is as follows: Field Description --------------------------- Atom Size 4 bytes Atom Type 4 bytes Data Variable By supplying the .MOV file with a large atom size results in a insufficiently-sized heap block to be allocated, resulting in a complete heap memory overwrite ultimately failing in the List_Component() function. References QuickTime: QuickTime File Format Vendor Status: Apple has released a patch for this vulnerability. The patch is available via the Updates section of the affected applications. This vulnerability has been assigned the CVE identifier CAN-2004-0431. Credit: Discovery: Karl Lynn Copyright (c) 1998-2006 eEye Digital Security Permission is hereby granted for the redistribution of this alert electronically. It is not to be edited in any way without express consent of eEye. If you wish to reprint the whole or any part of this alert in any other medium excluding electronic medium, please email alert (at) eEye (dot) com [email concealed] for permission. Disclaimer The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are no warranties, implied or express, with regard to this information. In no event shall the author be liable for any direct or indirect damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk.

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