RSA ACE/Server UDP Denial of Service Vulnerability

ACE/Server is an authentication solution that uses SecureID tokens offered by RSA Data Security for Microsoft's Windows 2000 and Solaris. It had previously been reported that sending UDP datagrams to the server at a high-speed (250 packets per second) causes the server to crash. The vendor has revealed that they have "tested the potential vulnerability by force-feeding servers with 1000 packets per second, without reproducing a process crash. In these tests, the server rode out the flood and recovered within minutes, without needing to be stopped or rebooted. " According to the vendor, ACE/Server exhibited "a problem handling UDP packets which appeared to be a continuation of a previous session, but where no such session existed." It will not be possible to make requests for authentication until the server is restarted.


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