Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to bypass security restrictions on a targeted system. Updates are available.
Microsoft Windows contains a vulnerability that could allow an unauthenticated, remote attacker to bypass security restrictions.
The vulnerability is due to improper validation of SSL certificates by the affected software when handling IP over HTTPS (IP-HTTPS) Tunneling Protocol communications. An authenticated, remote attacker with valid system or domain credentials could exploit the vulnerability by presenting a revoked SSL certificate to a service or application that uses the IP-HTTPS component of the affected software. A successful exploit could allow the attacker to bypass certificate validation security checks.
Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
The following Microsoft products are affected:
Windows Server 2008 R2 for x64-bit and Itanium SP1 and prior
Windows Server 2012
To exploit the vulnerability, an attacker must possess a certificate issued from the targeted domain and valid system or domain credentials. These access requirements could reduce the likelihood of a successful exploit.
Microsoft has corrected this vulnerability by modifying the way Microsoft Windows validates certificates.
Microsoft has released a security bulletin at the following link: MS12-083
An authenticated, remote attacker with valid system or domain credentials could exploit the vulnerability to bypass certificate validation security checks.
Additional technical information is not available.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have system, network, or domain access.
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 critical 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.
Windows Server 2008 R2
x64-Based Systems Edition Base, SP1 | Itanium-Based Systems Edition Base, SP1
Windows Server 2012
Original Release Base
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