Staying Safe in Times of Cyber Uncertainty
Check Point Advisories

Preemptive Protection against Microsoft Windows TCP/IP ICMP Denial of Service (MS11-064; CVE-2011-1871)

Check Point Reference: CPAI-2011-354
Date Published: 9 Aug 2011
Severity: High
Last Updated: Saturday 01 January, 2011
Source: Microsoft Security Bulletin MS11-064
Industry Reference:CVE-2011-1871
Protection Provided by:
Who is Vulnerable? Windows Vista Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Vulnerability Description A denial of service (DoS) vulnerability has been reported in Microsoft Windows TCP/IP stack. An attacker could exploit this vulnerability to cause a DoS condition in an affected system. As a result, the system may become unresponsive and automatically reboot.
Vulnerability DetailsThis is a denial of service vulnerability. The issue occurs when the Windows TCP/IP stack processes a sequence of malicious ICMP messages in an improper manner. A remote attacker can exploit this vulnerability by creating a program that will send sequences of malicious ICMP messages to an affected system. Successful exploitation may enable an attacker to create a DoS condition in an affected system. As a result, the system may become unresponsive and automatically reboot.

Protection Overview

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