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ESB-2014.0725 - [Win] Microsoft .NET Framework: Increased privileges - Remote/unauthenticated

Date: 14 May 2014

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2014.0725
         Vulnerability in .NET Framework Could Allow Elevation of
                            Privilege (2958732)
                                14 May 2014

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft .NET Framework
Publisher:         Microsoft
Operating System:  Windows Server 2003
                   Windows Vista
                   Windows Server 2008
                   Windows 7
                   Windows Server 2008 R2
                   Windows 8
                   Windows 8.1
                   Windows Server 2012
                   Windows Server 2012 R2
Impact/Access:     Increased Privileges -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2014-1806  

Original Bulletin: 
   http://technet.microsoft.com/en-us/security/bulletin/ms14-026

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

Microsoft Security Bulletin - MS14-026 - Important

Vulnerability in .NET Framework Could Allow Elevation of Privilege (2958732)

Published Date: May 13, 2014

Version: 1.0

General Information

Executive Summary

This security update resolves a privately reported vulnerability in Microsoft 
.NET Framework. The vulnerability could allow elevation of privilege if an 
unauthenticated attacker sends specially crafted data to an affected 
workstation or server that uses .NET Remoting. .NET Remoting is not widely 
used by applications; only custom applications that have been specifically 
designed to use .NET Remoting would expose a system to the vulnerability.

This security update is rated Important for Microsoft .NET Framework 1.1 
Service Pack 1, Microsoft .NET Framework 2.0 Service Pack 2, Microsoft .NET 
Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4, 
Microsoft .NET Framework 4.5, and Microsoft .NET Framework 4.5.1 on affected 
releases of Microsoft Windows. 

The security update addresses the vulnerability by helping to ensure that 
.NET Framework properly enforces security controls for application memory. 

Affected Software

Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008 R2
Windows 8
Windows 8.1
Windows Server 2012
Windows Server 2012 R2
Windows RT and Windows RT 8.1

Vulnerability Information

TypeFilterLevel Vulnerability – CVE-2014-1806

An elevation of privilege vulnerability exists in the way that .NET 
Framework handles TypeFilterLevel checks for some malformed objects.

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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