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             AUSCERT External Security Bulletin Redistribution

          Vulnerability in JScript and VBScript Scripting Engines
                    Could Allow Information Disclosure
                              9 February 2011


        AusCERT Security Bulletin Summary

Product:           JScript and VBScript Scripting Engines
Publisher:         Microsoft
Operating System:  Windows 7
                   Windows Server 2008
Impact/Access:     Read-only Data Access -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-0031  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Microsoft Security Bulletin MS11-009 - Important

Vulnerability in JScript and VBScript Scripting Engines Could Allow Information
  Disclosure (2475792)

Published: February 08, 2011

Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in the JScript
and VBScript scripting engines. The vulnerability could allow information
disclosure if a user visited a specially crafted Web site. An attacker would
have no way to force users to visit these Web sites. Instead, an attacker would
have to convince users to visit the Web site, typically by getting them to
click a link in an e-mail message or Instant Messenger message that takes users
to the attacker's Web site.

This security update is rated Important for all supported editions of Windows 7
and Moderate for all supported editions of Windows Server 2008 R2. For more
information, see the subsection, Affected and Non-Affected Software, in this

The security update addresses the vulnerability by correcting the manner in
which the JScript and VBScript scripting engines process scripts in Web pages.

Affected Software

Windows 7 for 32-bit Systems
Windows 7 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for Itanium-based Systems

Vulnerability Information

Scripting Engines Information Disclosure Vulnerability - CVE-2011-0031

An information disclosure vulnerability exists in the JScript and VBScript
scripting engines due to a memory corruption error. An attacker who successfully
exploited this vulnerability could read data not intended to be disclosed. Note
that this vulnerability would not allow an attacker to execute code or to
elevate their user rights directly, but it could be used to obtain information
that could be used to try to further compromise the affected system.

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