Vulnerability Alert

Microsoft .NET Framework Memory Pointer Handling Information Disclosure Vulnerability

 
Threat Type:CWE-200: Information Leak / Disclosure
IntelliShield ID:27733
Version:1
First Published:2013 January 08 13:22 GMT
Last Published:2013 January 08 13:22 GMT
Port: Not available
CVE:CVE-2013-0001
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.2
 
Version Summary:Microsoft .NET Framework contains a vulnerability that could allow an unauthenticated, remote attacker to access sensitive information on a targeted system. Updates are available.
 
 
Description
Microsoft .NET Framework contains a vulnerability that could allow an unauthenticated, remote attacker to access sensitive information on a targeted system.

The vulnerability is due to the way the .NET Framework handles pointers to unmanaged memory locations. An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to visit a malicious website. If successful, the attacker could bypass Code Access Security (CAS) restrictions to obtain sensitive information stored in unmanaged memory locations.

Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
 
Warning Indicators
Microsoft .NET Framework 1.0 SP3, 1.1 SP1, 2.0 SP2, 3.0 SP2, and 4 are vulnerable when running on the following systems:
  • Windows XP SP3
  • Windows XP Professional x64 Edition SP2
  • Windows Server 2003 SP2
  • Windows Server 2003 x64 Edition SP2
  • Windows Server 2003 with SP2 for Itanium-based Systems
  • Windows Vista SP2 
  • Windows Vista x64 Edition SP2
  • Windows Server 2008 for 32-bit Systems SP2
  • Windows Server 2008 for x64-based Systems SP2
  • Windows Server 2008 for Itanium-based Systems SP2
  • Windows 7 for 32-bit Systems SP1 and prior
  • 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 link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.

Microsoft has corrected this vulnerability by correcting how the .NET Framework initializes memory arrays.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the January 2013 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 January 2013
 
Vendor Announcements
Microsoft has released a security bulletin at the following link: MS13-004
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to access sensitive information on a targeted system. The attacker could use the information to launch additional attacks.
 
Technical Information
The vulnerability is due to the way the .NET Framework handles pointers to unmanaged memory locations. As a result, the affected software fails to initialize the contents of a memory array.

An unauthenticated, remote attacker could exploit the vulnerability by hosting an Extensible Application Markup Language (XAML) browser application (XBAP) and persuading a user to visit the malicious website. When the malicious XBAP is processed, an error condition may occur that the attacker could use to access sensitive information on the targeted system or bypass CAS restrictions. The attacker could use the information to launch additional attacks.
 
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 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 Microsoft Update service. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
 
Alert History
 
Initial Release


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

Primary Products:
Microsoft, Inc..NET Framework 1.0 SP3 | 1.1 SP1 | 2.0 SP2 | 3.0 SP2 | 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 SP2 | Datacenter Edition, 64-bit (Itanium) SP2 | Datacenter Edition x64 (AMD/EM64T) SP2 | Enterprise Edition SP2 | Enterprise Edition, 64-bit (Itanium) SP2 | Enterprise Edition x64 (AMD/EM64T) SP2 | Standard Edition SP2 | Standard Edition, 64-bit (Itanium) SP2 | Standard Edition x64 (AMD/EM64T) SP2 | Web Edition SP2
Microsoft, Inc.Windows Server 2008 Datacenter Edition SP2 | Datacenter Edition, 64-bit SP2 | Itanium-Based Systems Edition SP2 | Enterprise Edition SP2 | Enterprise Edition, 64-bit SP2 | Essential Business Server Standard SP2 | Essential Business Server Premium SP2 | Essential Business Server Premium, 64-bit SP2 | Standard Edition SP2 | Standard Edition, 64-bit SP2 | Web Server SP2 | Web Server, 64-bit 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 SP2 | Home Premium SP2 | Business SP2 | Enterprise SP2 | Ultimate SP2 | Home Basic x64 Edition SP2 | Home Premium x64 Edition SP2 | Business x64 Edition SP2 | Enterprise x64 Edition SP2 | Ultimate x64 Edition SP2
Microsoft, Inc.Windows XP Home Edition SP3 | Professional x64 (AMD/EM64T) SP2 | Tablet PC Edition 2005, SP3 | Media Center Edition 2005, SP3




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