September 8, 2009
Microsoft Windows TCP/IP protocol implementation is prone to a remote denial-of-service vulnerability.
An attacker can exploit this issue to crash the affected computer, denying service to legitimate users.
Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploits.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor the network for suspicious requests. This may help detect attacks that try to exploit these and similar vulnerabilities. Audit all applicable logs regularly.
The vendor has released an update. Please see references for details.
Felix Lindner from Recurity Labs GmbH
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