Date Discovered December 14, 2010
Description Microsoft Exchange Server is prone to a remote denial-of-service vulnerability.
A successful exploit will allow a remote attacker to cause the application to stop responding, denying service to legitimate users.
The issue affects Microsoft Exchange Server 2007 Service Pack 2 for x64-based systems.
- Microsoft Exchange Server 2007 x64 SP2
Block external access at the network boundary, unless external parties require service. Filter access to the affected computer at the network boundary if global access isn't required. 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 network traffic for
anomalous or suspicious activity. Monitor logs generated by NIDS and by the server itself for evidence of attacks against the server.
The vendor has released an advisory and fixes. Please see the references for more information.
Credits Oleksandr Mirosh, working with TippingPoint's Zero Day Initiative
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