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AUSCERT External Security Bulletin Redistribution
ESB-2014.1375
Vulnerability in .NET Framework Could Allow Security Feature
Bypass (2984625)
13 August 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft .NET Framework
Publisher: Microsoft
Operating System: Windows
Impact/Access: Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2014-4062
Original Bulletin:
https://technet.microsoft.com/library/security/ms14-046
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Microsoft Security Bulletin MS14-046 - Important
Vulnerability in .NET Framework Could Allow Security Feature Bypass (2984625)
Published: August 12, 2014
Version: 1.0
General Information
Executive Summary
This security update resolves a privately reported vulnerability in Microsoft
.NET Framework. The vulnerability could allow security feature bypass if a
user visits a specially crafted website. In a web-browsing attack scenario, an
attacker who successfully exploited this vulnerability could bypass the
Address Space Layout Randomization (ASLR) security feature, which helps
protect users from a broad class of vulnerabilities. The security feature
bypass by itself does not allow arbitrary code execution. However, an attacker
could use this ASLR bypass vulnerability in conjunction with another
vulnerability, such as a remote code execution vulnerability, that could take
advantage of the ASLR bypass to run arbitrary code.
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, and Microsoft .NET Framework 3.5.1 on affected releases of
Microsoft Windows.
Affected Software
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Windows 8 & 8.1
Windows Server 2012 and Windows Server 2012 R2
Windows RT and Windows RT 8.1
Vulnerability Information
NET ASLR Vulnerability - CVE-2014-4062
A security feature bypass vulnerability exists in the Microsoft .NET Framework
that could allow an attacker to bypass the Address Space Layout Randomization
(ASLR) security feature, which helps protect users from a broad class of
vulnerabilities. The security feature bypass by itself does not allow
arbitrary code execution. However, an attacker could use this ASLR bypass
vulnerability in conjunction with another vulnerability, such as a remote code
execution vulnerability, that could take advantage of the ASLR bypass to run
arbitrary code.
To view this vulnerability as a standard entry in the Common Vulnerabilities
and Exposures list, see CVE-2014-4062.
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