| Buffer Overflow in Windows QuickTime Player
Author : "iDEFENSE Labs" <email@example.com>
iDEFENSE Security Advisory 03.31.03:
Buffer Overflow in Windows QuickTime Player
March 31, 2003
QuickTime Player is a popular media player for both the Microsoft Windows
and Apple Mac platforms. More information about the application is
available at http://www.apple.com/quicktime/ .
An exploitable buffer overflow condition has been discovered in Apple
Computer Inc.'s QuickTime Player, allowing for the remote execution of
arbitrary code. The vulnerability lies in the processing of long QuickTime
URL's (quicktime:// or through the -u switch). When processing a QuickTime
URL, the application is launched in the following manner as can be seen
from the Windows registry key HKEY_CLASSES_ROOT/quicktime:
%PATH TO QUICKTIME%\QuickTimePlayer.exe -u"%1"
A URL containing 400 characters will overrun the allocated space on the
stack overwriting the saved instruction pointer (EIP). This will thereby
allow an attacker to redirect the flow of control. An example URL that
will cause QuickTime player to crash is:
Where the character 'A' is repeated 400 times.
Any remote attacker can compromise a target system if he or she can
convince a user to load a specially crafted exploit URL. Upon successful
exploitation, arbitrary code can be executed under the privileges of the
user who launched QuickTime.
iDEFENSE has confirmed that QuickTime Player versions 5.x and 6.0 for
Microsoft Windows platform are vulnerable. QuickTime for MacOS is not
Removing the QuickTime handler from the web browser or removing the
registry key HKEY_CLASSES_ROOT/quicktime can prevent automatic
exploitation through HTML pages.
VI. VENDOR FIX
Apple has released QuickTime 6.1 which addresses this vulnerability.
is available from http://www.apple.com/quicktime/download/ .
VII. CVE INFORMATION
The Mitre Corp.'s Common Vulnerabilities and Exposures (CVE) Project
assigned the identification number CAN-2003-0168 to this issue.
VIII. DISCLOSURE TIMELINE
01/16/2003 Issue disclosed to iDEFENSE
02/24/2003 iDEFENSE notification sent to firstname.lastname@example.org
02/24/2003 Response received from Apple Product Security team
02/24/2003 iDEFENSE clients notified
03/31/2003 Coordinated Public disclosure
Texonet (http://www.texonet.com) is credited with discovering this
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