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AUSCERT External Security Bulletin Redistribution
ESB-2011.0629
Vulnerability in .NET Framework Could Allow Remote Code Execution (2538814)
15 June 2011
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2011-1271
Original Bulletin:
http://www.microsoft.com/technet/security/bulletin/MS11-044.mspx
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Microsoft Security Bulletin MS11-044 - Critical
Vulnerability in .NET Framework Could Allow Remote Code Execution (2538814)
Version: 1.0
General Information
Executive Summary
This security update resolves a publicly disclosed vulnerability in Microsoft
.NET Framework. The vulnerability could allow remote code execution on a
client system if a user views a specially crafted Web page using a Web browser
that can run XAML Browser Applications (XBAPs). Users whose accounts are
configured to have fewer user rights on the system could be less impacted than
users who operate with administrative user rights. The vulnerability could
also allow remote code execution on a server system running IIS, if that server
allows processing ASP.NET pages and an attacker succeeds in uploading a
specially crafted ASP.NET page to that server and then executes the page, as
could be the case in a Web hosting scenario. This vulnerability could also be
used by Windows .NET applications to bypass Code Access Security (CAS)
restrictions.
This security update is rated Critical for all affected releases of Microsoft
.NET Framework for Windows XP, Windows Server 2003, Windows Vista, Windows
Server 2008, Windows 7, and Windows Server 2008 R2. For more information, see
the subsection, Affected and Non-Affected Software, in this section.
Affected Software
Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems
Windows Vista Service Pack 1
Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 1
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Vulnerability Information
.NET Framework JIT Optimization Vulnerability - CVE-2011-1271
A remote code execution vulnerability exists in the way that Microsoft .NET
Framework validates certain values within an object. An attacker who
successfully exploited this vulnerability could take complete control of an
affected system. An attacker could then install programs; view, change, or
delete data; or create new accounts with full user rights. Users whose accounts
are configured to have fewer user rights on the system could be less impacted
than users who operate with administrative user rights.
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