Cisco IOS flaw could lead to net attack

Security firm Symantec has upped its alert level following the announcement of a security flaw in Cisco's IOS operating system. There is a fix available, however.

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Affected are those devices running IOS versions 12.2ZH and 12.2ZL, 12.3, 12.3T, 12.4 and 12.4T, Cisco said. Users can log on to their Cisco device and enter the "show version" command to determine which version of IOS it is running, Cisco said. The company rates the issue as a "medium" urgency.

Symantec advises users who can't install the patch immediately to disable the Firewall Authentication Proxy for FTP and Telnet Sessions or limit access to the service to trusted hosts and networks.

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[ZDNet]