EEYEB-20051229 Apple QuickTime QTIF Stack Overflow Release Date: January 10, 2006 Date Reported: December 29, 2005 Patch Development Time (In Days): 12 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 Overview: eEye Digital Security has discovered a critical vulnerability in QuickTime Player. There is a stack overflow in the way QuickTime processes qtif format files. An attacker can create a qtif file and send it to the user via email, web page, or qtif file with activex and can directy overflow a function pointer immediately used so it can bypass any stack overflow protection in systems such as xp sp2 and 2003 sp1. Technical Details: When Quicktime processes the data field of a qtif format file, it will copy it to the stack by a byte to a byte , but there is no proper checking, so it will cause a stack overflow in memory. And in this stack, there is a function pointer which will be used immediately when it pre byte copies, so we can use it to bypass any stack overflow protection, such in xp sp2 and 2003 sp1. The origin function point value is 0x44332211. We only need to overflow it to : 0x08332211, ensuring it didn't cause a crash before the 0x44 has been overflowed to 0x08. When it overflows to 0x08332211, we can execute code to 0x08332211, and can first use javascript to get this memory and set my code in it. call [esp+138h+arg_4] <- call a function point in the stack, but this point can be overflowed References QuickTime: QuickTime File Format http://developer.apple.com/documentation/QuickTime/QTFF/index.html Protection: Retina Network Security Scanner has been updated to identify this vulnerability. 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 CVE-2005-3713. Credit: Discovery: Fang Xing Greetings: Thanks to all the guys at eEye, and especially Karl Lynn's help. 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.