August 12, 2008
Microsoft Windows is prone to a vulnerability in the IPsec implementation.
The vulnerability causes IPsec policies that are imported from a Windows Server 2003 domain to a Windows Server 2008 domain to be ignored. This will cause network traffic to be transmitted in clear text instead of being encrypted.
Implementing Ethernet switches and binding MAC addresses to switch ports may prevent attacks.
Use network switches to segment the internal network. This may help minimize sniffing to the local network segment.
Communicate sensitive information over encrypted channels.
Use application- or protocol-specific encryption in addition to IPsec when transmitting sensitive information.
Microsoft has released a security bulletin to address this vulnerability.
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