Microsoft Windows Kernel CVE-2011-1971 Remote Denial of Service Vulnerability

Description

Microsoft Windows is prone to a remote denial-of-service vulnerability. A remote attacker can exploit this issue to crash the Windows kernel, denying service to legitimate users.

Technologies Affected

• Avaya Aura Conferencing 6.0 Standard
• Microsoft Windows 7 for 32-bit Systems
• Microsoft Windows 7 for 32-bit Systems SP1
• Microsoft Windows 7 for x64-based Systems
• Microsoft Windows 7 for x64-based Systems SP1
• Microsoft Windows Server 2008 R2 Itanium
• Microsoft Windows Server 2008 R2 Itanium SP1
• Microsoft Windows Server 2008 R2 x64
• Microsoft Windows Server 2008 R2 x64 SP1
• Microsoft Windows Server 2008 for 32-bit Systems SP2
• Microsoft Windows Server 2008 for Itanium-based Systems SP2
• Microsoft Windows Server 2008 for x64-based Systems SP2
• Microsoft Windows Vista SP2
• Microsoft Windows Vista x64 Edition SP2

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, block access at the network perimeter to computers hosting the vulnerable operating system.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity such as unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Do not follow links provided by unknown or untrusted sources.
To reduce the likelihood of successful exploits, never follow links provided by unfamiliar or untrusted sources.

Do not use client software to access unknown or untrusted hosts from critical systems.
To limit the risk of exploits, never connect to unknown or untrusted services.

Vendor updates are available. Please see the references for more information.