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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2009-0129
Multiple Vulnerabilities in Microsoft .NET Common Language Runtime

Original Issue Date:October 15, 2009

Severity Rating: HIGH

Systems Affected

  • Microsoft Windows 2000 Service Pack 4
  • Microsoft Windows XP Service Pack 2
  • Microsoft Windows XP Service Pack 3
  • Microsoft Windows XP Professional x64 Edition Service Pack 2
  • Microsoft Windows Server 2003 Service Pack 2
  • Microsoft Windows Server 2003 x64 Edition Service Pack 2
  • Microsoft Windows Server 2003 with SP2 for Itanium-based Systems
  • Microsoft Windows Vista
  • Microsoft Windows Vista Service Pack 1
  • Microsoft Windows Vista Service Pack 2
  • Microsoft Windows Vista x64 Edition Service Pack 1
  • Microsoft Windows Vista x64 Edition Service Pack 2
  • Microsoft Windows Server 2008 for 32-bit Systems and with Service Pack 2
  • Microsoft Windows Server 2008 for x64-based Systems and With Service Pack 2
  • Microsoft Windows Server 2008 for Itanium-based Systems and With Service Pack 2
  • Windows 7 for 32-bit systems
  • Windows 7 for x64-based systems
  • Windows Server 2008 R2 for x64-based Systems
  • Windows Server 2008 R2 for Itanium-based systems
  • Microsoft Silverlight 2 when installed on Mac
  • Microsoft Silverlight 2 when installed on all release of Microsoft Windows Client
  • Microsoft Silverlight 2 when installed on all release of Microsoft Windows Server

Overview

Multiple vulnerabilities have been reported in Microsoft .NET framework and Microsoft Silverlight. Successful exploitation of these vulnerabilities could allow an attacker to execute an arbitrary code on the affected system in the context of currently logged in user. If a user is logged on with administrative privileges, an attacker who successfully exploited this vulnerability could take complete control of the system.

Description

1. Microsoft .NET Framework Pointer Verification Vulnerability ( CVE-2009-0090   )

A remote code execution vulnerability exists in the Microsoft .NET framework due to an error that allow malicious .NET application obtain pointer to stack memory area that is no longer used. The malicious .NET application latter could modify legitimate values placed at that stack location, leading to arbitrary code execution.

2. Microsoft .NET Framework Type Verification Vulnerability ( CVE-2009-0091   )

A remote code execution vulnerability exists in the Microsoft .NET framework due to error in handling type equality check in .NET application. An attacker could exploit this vulnerability by crafting malicious .NET application that cast object of one type into another type, leading to arbitrary code execution.

3. Microsoft Silverlight and Microsoft .NET Framework CLR Vulnerability ( CVE-2009-2497   )

A remote code execution vulnerability exists in the Microsoft Silverlight and Microsoft .NET framework, due to the error in handling interfaces when running .NET application. An attacker could exploit this vulnerability by crafting malicious .NET application to modify memory of choice, leading to arbitrary code execution.

Solution

Apply appropriate updates as mentioned in the Microsoft Security Bulletin MS09-061

Vendor Information

Microsoft
http://www.microsoft.com/technet/security/bulletin/ms09-061.mspx

References

VUPEN
http://www.vupen.com/english/advisories/2009/2896

SecurityTracker
http://securitytracker.com/alerts/2009/Oct/1023008.html

SecurityFocus
http://www.securityfocus.com/bid/36611/
http://www.securityfocus.com/bid/36617/
http://www.securityfocus.com/bid/36618/

CVE Name
CVE-2009-0090
CVE-2009-0091
CVE-2009-2497

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-2436857

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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