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Microsoft JScript memory corruption vulnerability

Vulnerability Note VU#390044

Original Release Date: 2006-06-13 | Last Revised: 2006-06-13


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


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.


For more information refer to Microsoft Security Bulletin MS06-023


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.


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.

Vendor Information


Microsoft Corporation Affected

Updated:  June 13, 2006



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Refer to

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

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2006-1313
Severity Metric: 37.94
Date Public: 2006-06-13
Date First Published: 2006-06-13
Date Last Updated: 2006-06-13 19:41 UTC
Document Revision: 25

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