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Title: Flaw in Windows Script Engine Could Allow Code Execution (814078) Date: 19 March 2003 Software: Microsoft Windows 98 Microsoft Windows 98 Second Edition Microsoft Windows Me Microsoft Windows NT 4.0 Microsoft Windows NT 4.0 Terminal Server Edition Microsoft Windows 2000 Microsoft Windows XP Impact: Run Code of Attacker's Choice Max Risk: Critical Bulletin: MS03-008
Microsoft encourages customers to review the Security Bulletins at: http://www.microsoft.com/technet/security/bulletin/MS03-008.asp http://www.microsoft.com/security/security_bulletins/ms03-008.asp
The Windows Script Engine provides Windows operating systems with the ability to execute script code. Script code can be used to add functionality to web pages, or to automate tasks within the operating system or within a program. Script code can be written in several different scripting languages, such as Visual Basic Script, or JScript.
A flaw exists in the way by which the Windows Script Engine for JScript processes information. An attacker could exploit the vulnerability by constructing a web page that, when visited by the user, would execute code of the attacker's choice with the user's privileges. The web page could be hosted on a web site, or sent directly to the user in email.
Although Microsoft has supplied a patch for this vulnerability and recommends all affected customers install the patch immediately, additional preventive measures have been provided that customers can use to help block the exploitation of this vulnerability while they are assessing the impact and compatibility of the patch. These temporary workarounds are discussed in the "Workarounds" section in the Frequently Asked Questions section of the security bulletin for this release.
for information on obtaining this patch.
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