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AUSCERT External Security Bulletin Redistribution
ESB-2016.0611.2
Microsoft Security Bulletin MS16-035: Security Update for .NET Framework to
Address Security Feature Bypass (3141780)
9 March 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft .NET Framework
Publisher: Microsoft
Operating System: Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008 R2
Windows 8.1
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
Windows 10
Impact/Access: Modify Arbitrary Files -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2016-0132
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-035
Revision History: March 9 2016: Update Impacts and access vectors for
CVE-2016-0132
March 8 2016: Initial Release
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Microsoft Security Bulletin MS16-035: Security Update for .NET Framework to
Address Security Feature Bypass (3141780)
Bulletin Number: MS16-035
Bulletin Title: Security Update for .NET Framework to Address Security Feature
Bypass
Severity: Important
KB Article: 3141780
Version: 1.0
Published Date: March 8, 2016
Executive Summary
This security update resolves a vulnerability in the Microsoft .NET Framework.
The security feature bypass exists in a .NET Framework component that does not
properly validate certain elements of a signed XML document.
This security update is rated Important for Microsoft .NET Framework 2.0
Service Pack 2, Microsoft .NET Framework 3.0 Service Pack 2, Microsoft .NET
Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.5.2,
Microsoft .NET Framework 4.6, and Microsoft .NET Framework 4.6.1 on affected
releases of Microsoft Windows.
Affected Software
Microsoft .NET Framework 2.0 Service Pack 2
Microsoft .NET Framework 3.0 Service Pack 2
Microsoft .NET Framework 3.5
Microsoft .NET Framework 3.5.1
Microsoft .NET Framework 4.5.2[1]
Microsoft .NET Framework 4.6 [1]
Microsoft .NET Framework 4.6.1
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Windows 8.1 for 32-bit Systems
Windows 8.1 for x64-based Systems
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
Windows 10 for 32-bit Systems[3] (3140745)
Windows 10 for x64-based Systems[3] (3140745)
Windows 10 Version 1511 for 32-bit Systems[3] (3140768)
Windows 10 Version 1511 for x64-based Systems[3] (3140768)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
[1]For information about changes in support for .NET Framework 4.x, see
Internet Explorer and .NET Framework 4.x Support Announcements.
[2]Windows RT 8.1 updates are available only via Windows Update.
[3]Windows 10 updates are cumulative. In addition to containing non-security
updates, they also contain all of the security fixes for all of the Windows
10-affected vulnerabilities shipping with the monthly security release. The
updates are available via the Microsoft Update Catalog.
Vulnerability Information
.NET XML Validation Security Feature Bypass - CVE-2016-0132
A security feature bypass vulnerability exists in a .NET Framework component
that does not properly validate certain elements of a signed XML document. An
attacker who successfully exploited the vulnerability could modify the
contents of an XML file without invalidating the signature associated with the
file. If a .NET application relies on the signature to be non-malicious, the
behavior of the application could become unpredictable. In custom
applications, the security impact depends on the specific usage scenario.
In a .NET application attack scenario, an attacker could modify the contents
of an XML file without invalidating the signature associated with the file.
The update addresses the vulnerability by correcting how the .NET Framework
validates XML documents.
The following table contains links to the standard entry for each
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
.NET XML Validation Security Feature Bypass CVE-2016-0132 No No
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