Vulnerability Alert

Microsoft .NET Framework GraphicsPathIterator Validation Arbitrary Code Execution Vulnerability

 
Threat Type:CWE-94: Code Injection
IntelliShield ID:25560
Version:3
First Published:2012 April 10 17:20 GMT
Last Published:2012 April 25 15:29 GMT
Port: Not available
CVE:CVE-2012-0163
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Moderate Damage
CVSS Base:9.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:7.3
 
Version Summary:

Additional technical information to describe the Microsoft .NET Framework parameter validation arbitrary code execution vulnerability is available.

 
 
Description

Microsoft .NET Framework contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system.

The vulnerability is due to improper validation of certain parameters by the .NET Framework.  An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to visit a malicious website. If successful, the attacker could execute arbitrary code on the system with the privileges of the user.

Proof-of-concept code that exploits this vulnerability is publicly available.

Microsoft has confirmed the vulnerability in a security bulletin and released software updates.

 
Warning Indicators

Microsoft .NET Framework versions 1.0 SP3, 1.1 SP1, 2.0 SP2, 3.5.1, and 4.0 are vulnerable when running on the following systems:

  • Windows XP Tablet Edition 2005 SP3 and prior
  • Windows XP Media Center Edition 2005 SP3 and prior
  • Windows XP SP3 and prior
  • Windows XP Professional x64 Edition SP2 and prior
  • Windows Server 2003 SP2 and prior
  • Windows Server 2003 x64 Edition SP2 and prior
  • Windows Server 2003 Itanium-based Edition SP2 and prior
  • Windows Vista SP2 and prior
  • Windows Vista x64 Edition SP2 and prior
  • Windows Server 2008 for 32-bit Systems SP2 and prior
  • Windows Server 2008 for x64-based Systems SP2 and prior
  • Windows Server 2008 for Itanium-based Systems SP2 and prior
  • Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems SP1 and prior
  • Windows 7 for x64-based Systems and Windows 7 for x64-based Systems SP1 and prior
  • Windows Server 2008 R2 for x64-based Systems SP1 and prior
  • Windows Server 2008 R2 for Itanium-based Systems SP1 and prior
 
IntelliShield Analysis

To exploit the vulnerability, the attacker may provide a file or a link to a malicious website and use misleading language or instructions to persuade the user to open the file or follow the provided link.

Microsoft has corrected this vulnerability by correcting the manner in which parameters are validated by the .NET Framework.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the?April 2012 security bulletin release. This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin Release for?April 2012.

 
Vendor Announcements

Microsoft has released a security bulletin at the following link: MS12-025?

 
Impact

An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on an affected system with the privileges of the user. If the user holds elevated privileges, the attacker could gain complete control over the system.

 
Technical Information

The vulnerability is due to improper input handling by the GraphicsPathIterator class, that is used to call native Windows Graphics Device Interface (GDI+) library functions.  When calling native GDI+ functions, the affected class could perform insufficient sanitization on the input that is received via certain unspecified parameters, leading to a corrupt memory condition.

An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to visit a malicious web page.  Processing the malicious web page could trigger a memory corruption error, that could allow the attacker to execute arbitrary code on the system under the security context of the targeted user.

 
Safeguards

Administrators are advised to apply the appropriate updates.

Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.

Administrators may consider disabling XAML browser applications in Internet Explorer.

Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.

Administrators are advised to monitor affected systems.

 
Patches/Software

Microsoft customers can obtain updates directly by using the links in the security bulletin. These updates are also distributed by Windows automatic update features and available on the Windows Update website. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.


Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
1135/0Microsoft .NET Framework Parameter Validation VulnerabilityS6402012 Apr 10 
 
Alert History
 

Version 2, April 24, 2012, 5:05 PM: Proof-of-concept code to exploit the Microsoft .NET Framework parameter validation arbitrary code execution vulnerability is publicly available.

Version 1, April 10, 2012, 12:20 PM: Microsoft .NET Framework contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code. Updates are available.



Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc..NET Framework 1.0 Base, SP1, SP2, SP3 | 1.1 Base, SP1 | 2.0 Base, SP1, SP2 | 3.5.1 Base | 4.0 Base

Associated Products:
Microsoft, Inc.Windows 7 for 32-bit systems Base, SP1 | for x64-based systems Base, SP1
Microsoft, Inc.Windows Server 2003 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit (Itanium) Base, SP1, SP2 | Datacenter Edition x64 (AMD/EM64T) Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit (Itanium) Base, SP1, SP2 | Enterprise Edition x64 (AMD/EM64T) Base, SP1, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit (Itanium) Base, SP1, SP2 | Standard Edition x64 (AMD/EM64T) Base, SP1, SP2 | Web Edition Base, SP1, SP2
Microsoft, Inc.Windows Server 2008 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit Base, SP1, SP2 | Itanium-Based Systems Edition Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit Base, SP1, SP2 | Essential Business Server Standard Base, SP1, SP2 | Essential Business Server Premium Base, SP1, SP2 | Essential Business Server Premium, 64-bit Base, SP1, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit Base, SP1, SP2 | Web Server Base, SP1, SP2 | Web Server, 64-bit Base, SP1, SP2
Microsoft, Inc.Windows Server 2008 R2 x64-Based Systems Edition Base, SP1 | Itanium-Based Systems Edition Base, SP1
Microsoft, Inc.Windows Vista Home Basic Base, SP1, SP2 | Home Premium Base, SP1, SP2 | Business Base, SP1, SP2 | Enterprise Base, SP1, SP2 | Ultimate Base, SP1, SP2 | Home Basic x64 Edition Base, SP1, SP2 | Home Premium x64 Edition Base, SP1, SP2 | Business x64 Edition Base, SP1, SP2 | Enterprise x64 Edition Base, SP1, SP2 | Ultimate x64 Edition Base, SP1, SP2
Microsoft, Inc.Windows XP Home Edition Base, SP1, SP2, SP3 | Professional Edition Base, SP1, SP2, SP3 | Professional Edition, 64-bit (Itanium) Base, 2003 (itanium 2), SP1, SP2 | Professional x64 (AMD/EM64T) Base, SP1, SP2 | Tablet PC Edition Base, 2005 | Media Center Edition Base, 2005




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