Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service condition on a targeted system. Updates are available.
A vulnerability in the Microsoft Windows TCP/IP stack could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper handling of memory allocation by the affected software while processing crafted Internet Control Message Protocol version 6 (ICMPv6) packets. An unauthenticated, remote attacker could exploit the vulnerability by sending crafted ICMPv6 packets to a targeted system. Processing the crafted packets could cause the system to become unresponsive, resulting in a DoS condition.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
The following Microsoft products are affected:
Windows Vista and x64 Edition SP2
Windows Server 2008 for 32-bit and x64 based Systems SP2
Windows Server 2008 for Itanium-based Systems SP2
Windows 7 for 32-bit and x64-based Systems SP1
Windows Server 2008 R2 for x64-based and Itanium-based Systems SP1
Windows 8 for 32 and 64-bit Systems
Windows Server 2012
To exploit this vulnerability, an attacker may require access to trusted, internal networks to send crafted ICMPv6 packets to the affected software. This access requirement could limit the likelihood of a successful exploit.
Microsoft has resolved the vulnerability by changing the way the Windows TCP/IP stack allocates memory while processing crafted ICMPv6 packets.
Microsoft has released a security bulletin at the following link: MS13-065
An unauthenticated, remote attacker could exploit the vulnerability to cause the targeted system to stop responding, resulting in a DoS condition for legitimate users.
The vulnerability is due to improper handling of memory allocation by the Windows TCP/IP stack used by the affected software while processing crafted ICMPv6 packets.
An unauthenticated, remote attacker could exploit the vulnerability by sending crafted ICMPv6 packets to a targeted system. Processing the crafted packets could cause the system to become unresponsive, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected 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.
Administrators are advised to monitor affected systems.
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.
The security vulnerability applies to the following combinations of products.
for 32-bit systems SP1 | for x64-based systems SP1
Original Release Base
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
Windows Server 2008 R2
x64-Based Systems Edition SP1 | Itanium-Based Systems Edition SP1
Windows Server 2012
Original Release Base
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
for 32-bit systems Base | for x64-based systems Base
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