Microsoft .NET Framework and Silverlight contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.† Updates are available.
Microsoft .NET Framework and Silverlight contain a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code.
The vulnerability is due to improper processing of applications processed by the .NET Framework.†
An unauthenticated, remote attacker could exploit the†vulnerability by convincing a user to view a malicious website.† If successful, the attacker could execute arbitrary code on the system with the privileges of the user.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
Microsoft .NET Framework versions 1.0 SP3 and prior, 1.1 SP1 and prior, 2.0 SP2 and prior, 3.5.1, and 4 and Microsoft Silverlight 4 are vulnerable when running on the following Microsoft systems:
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 with SP2 and prior for Itanium-based Systems
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 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
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 released a security bulletin at the following link: MS11-078
An unauthenticated, remote attacker could exploit this vulnerability to execute arbitrary code on the system with the privileges of the user.† If the user holds elevated privileges, the attacker could completely compromise the system.
The vulnerability is due to improper processing of Extensible Application Markup Language (XAML) browser applications.† The affected software fails to properly handle the inheritance of class properties.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to view a website that contains a malicious XAML browser application.† The processing of the application by the affected software could trigger an error condition could be leveraged to execute arbitrary code on the system with the privileges of the user.
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 from running within Internet Explorer.
Administrators are advised to monitor critical systems.
Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.
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.
Home Edition Base, SP1, SP2, SP3 | Professional Edition Base, SP1, SP2, SP3 | Professional x64 (AMD/EM64T) Base, SP2
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