Vulnerability Note VU#390044

Microsoft JScript memory corruption vulnerability

Overview

Microsoft JScript contains a memory corruption vulnerability. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Microsoft JScript

According to Microsoft Security Bulletin MS06-023:

JScript is the Microsoft implementation of the ECMA 262 language specification (ECMAScript Edition 3). JScript is an interpreted, object-based scripting language. For more information see the

product documentation

The Problem

Microsoft JScript fails to properly release objects allowing in a memory corruption vulnerability to occur. When a specially crafted JScript file, or specially crafted web page containing JScript is accessed, system memory can be corrupted in a way that could allow a remote attacker to execute arbitrary code.

Considerations

For more information refer to Microsoft Security Bulletin MS06-023

II. Impact

A remote, unauthenticated attacker may be able to execute arbitrary code. If the attacked user is running with administrative privileges, the attacker could take complete control of an affected system.

III. Solution

Apply a patch from Microsoft

Microsoft addresses this vulnerability with the updates listed in Microsoft Security Bulletin MS06-023.

Disable Active Scripting

For instructions on how to disable Active Scripting in Microsoft Internet Explorer, please refer to the Internet Explorer section of the Securing Your Web Browser document.

A complete list of workarounds is available in Microsoft Security Bulletin MS06-023.

Systems Affected

Vendor	Status	Date Updated
Microsoft Corporation	Vulnerable	13-Jun-2006

References

http://www.microsoft.com/technet/security/bulletin/ms06-023.mspx
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/script56/html/js56jsoriJScript.asp

Credit

This vulnerability was reported in Microsoft Security Bulletin MS06-023.

This document was written by Jeff Gennari.

Other Information

Date Public	06/13/2006
Date First Published	06/13/2006 03:28:38 PM
Date Last Updated	06/13/2006
CERT Advisory
CVE Name	CVE-2006-1313
US-CERT Technical Alerts
Metric	37.94
Document Revision	24

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Produced 2006 by US-CERT, a government organization
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