Foundry Networks ServerIron TCP/IP Sequence Predictability Vulnerability
Foundry has issued a response to the vulnerabilities descibed. That document is available at:
A firmware upgrade, 6.0.03 has been issued which remedies some of the problems presented, as well as adding the ability to run sshd on the machine.
A short term solution may be to add ACL's to prevent any machine, except for a trusted one, to connect to the switch. Another possible solution is to disable all services on the switch, and only administer it from its serial console.