MS12-035 - Vulnerabilities in .NET Framework Could Allow Remote Code Execution (2693777)

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Details
Vulnerability name/brief description MS12-035 - Vulnerabilities in .NET Framework Could Allow Remote Code Execution (2693777)
CVE/CAN name
Vendor threat level Critical
SophosLabs threat level High
Solution MS12-035
Vendor description This security update resolves two privately reported vulnerabilities in the .NET Framework. The vulnerabilities could allow remote code execution on a client system if a user views a specially crafted webpage 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. This security update is rated Critical for all supported editions of the Microsoft .NET Framework on all supported editions of Microsoft Windows.
SophosLabs comments CVE-2012-0160 - Vulnerability that exists when the .NET Framework incorrectly treats untrusted data as trusted. It occurs during serialization of an object. CVE-2012-0161 - Remote code execution vulnerability that occurs due to the improper handling of an exception during the object serialization process. In spite of these 2 vulnerabilities being privately reported, as these 2 vulnerabilities affects all versions of Windows with installed Microsoft .NET Framework, it is essential that the update be applied although its impact is likely to be mitigated.
SophosLabs testing result No SophosLabs testing result found
Currently known exploits
First sample seen No samples found
Discovery date 08 May 2012
Affected software Windows XP Service Pack 3 with Microsoft .NET Framework 1.0 Service Pack 3 (Media Center Edition 2005 and Tablet PC Edition 2005 only)
Windows XP Service Pack 3 with Microsoft .NET Framework 1.1 Service Pack 1
Windows XP Service Pack 3 with Microsoft .NET Framework 2.0 Service Pack 2
Windows XP Service Pack 3 with Microsoft .NET Framework 3.0 Service Pack 2
Windows XP Service Pack 3 with Microsoft .NET Framework 3.5 Service Pack 1
Windows XP Service Pack 3 with Microsoft .NET Framework 4
Windows XP Professional x64 Edition Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows XP Professional x64 Edition Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows XP Professional x64 Edition Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows XP Professional x64 Edition Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows XP Professional x64 Edition Service Pack 2 with Microsoft .NET Framework 4
Windows Server 2003 Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Server 2003 Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Server 2003 Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows Server 2003 Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Server 2003 Service Pack 2 with Microsoft .NET Framework 4
Windows Server 2003 x64 Edition Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Server 2003 x64 Edition Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Server 2003 x64 Edition Service Pack 2 with Microsoft .NET Framework 4
Windows Server 2003 with SP2 for Itanium-based Systems with Microsoft .NET Framework 1.1 Service Pack 1
Windows Server 2003 with SP2 for Itanium-based Systems with Microsoft .NET Framework 2.0 Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems with Microsoft .NET Framework 3.5 Service Pack 1
Windows Server 2003 with SP2 for Itanium-based Systems with Microsoft .NET Framework 4
Windows Vista Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Vista Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Vista Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows Vista Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Vista Service Pack 2 with Microsoft .NET Framework 4
Windows Vista x64 Edition Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Vista x64 Edition Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Vista x64 Edition Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows Vista x64 Edition Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Vista x64 Edition Service Pack 2 with Microsoft .NET Framework 4
Windows Server 2008 for 32-bit Systems Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Server 2008 for 32-bit Systems Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Server 2008 for 32-bit Systems Service Pack 2 with Microsoft .NET Framework 4
Windows Server 2008 for x64-based Systems Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Server 2008 for x64-based Systems Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2 with Microsoft .NET Framework 3.0 Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Server 2008 for x64-based Systems Service Pack 2 with Microsoft .NET Framework 4
Windows Server 2008 for Itanium-based Systems Service Pack 2 with Microsoft .NET Framework 1.1 Service Pack 1
Windows Server 2008 for Itanium-based Systems Service Pack 2 with Microsoft .NET Framework 2.0 Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2 with Microsoft .NET Framework 3.5 Service Pack 1
Windows Server 2008 for Itanium-based Systems Service Pack 2 with Microsoft .NET Framework 4
Windows 7 for 32-bit Systems with Microsoft .NET Framework 3.5.1
Windows 7 for 32-bit Systems with Microsoft .NET Framework 4
Windows 7 for 32-bit Systems Service Pack 1 with Microsoft .NET Framework 3.5.1
Windows 7 for 32-bit Systems Service Pack 1 with Microsoft .NET Framework 4
Windows 7 for x64-based Systems with Microsoft .NET Framework 3.5.1
Windows 7 for x64-based Systems with Microsoft .NET Framework 4
Windows 7 for x64-based Systems Service Pack 1 with Microsoft .NET Framework 3.5.1
Windows 7 for x64-based Systems Service Pack 1 with Microsoft .NET Framework 4
Windows Server 2008 R2 for x64-based Systems with Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for x64-based Systems with Microsoft .NET Framework 4
Windows Server 2008 R2 for Itanium-based Systems with Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for Itanium-based Systems with Microsoft .NET Framework 4
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 with Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 with Microsoft .NET Framework 4
Windows Server 2008 R2 for x64-based Systems with Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 with Microsoft .NET Framework 3.5.1
Windows Server 2008 R2 for x64-based Systems Service Pack 1 with Microsoft .NET Framework 4
References
Credits
  • MAPP
Revisions
  • May 8th, 2012 - Initial analysis written

Explanation of terms

Vulnerability Name/Brief Description:

Vendor identifier plus a brief description of the type of attack.

CVE/CAN Name:

Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.

Vendor Threat Level:

Threat level assigned by the vendor

SophosLabs Threat Level:

Threat level assigned by SophosLabs

  • LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
  • MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
  • HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
  • CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.

Solution:

Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.

Vendor Description:

Summary of the cause and potential effect of the vulnerability provided by the vendor.

SophosLabs Comments:

SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:

Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.

Currently Known Exploits:

List of identities for known exploits, if applicable.

First Sample Seen:

Date of the first sample seen by SophosLabs.

Discovery Date:

Date of the earliest known publically disclosed advisory.

Affected Software:

Vulnerable platforms and software versions.