Vulnerability Note VU#390044

Microsoft JScript memory corruption vulnerability

Original Release date: 13 Jun 2006 | Last revised: 13 Jun 2006


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.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Microsoft CorporationAffected-13 Jun 2006
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



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

This document was written by Jeff Gennari.

Other Information

  • CVE IDs: CVE-2006-1313
  • Date Public: 13 Jun 2006
  • Date First Published: 13 Jun 2006
  • Date Last Updated: 13 Jun 2006
  • Severity Metric: 37.94
  • Document Revision: 24


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