Information
A replay attack may enable an unauthorized user to gain access to the application. Authentication sessions between the authenticator and the application validating the user credentials must not be vulnerable to a replay attack.
An authentication process resists replay attacks if it is impractical to achieve a successful authentication by recording and replaying a previous authentication message.
Techniques used to address this include protocols using nonces (e.g., numbers generated for a specific one-time use) or challenges (e.g., TLS, WS_Security). Additional techniques include time-synchronous or challenge-response one-time authenticators.
Solution
Configure the OS10 Switch to implement replay-resistant authentication mechanisms for network access to privileged accounts:
OS10(config)# crypto fips enable
WARNING: Upon committing this configuration, the system will regenerate SSH keys. Please consult documentation and toggle FIPS mode only if you know what you are doing!
Continue? [yes/no(default)]:yes
OS10(config)#
Disable telnet if it has been enabled:
OS10(config)# no ip telnet server enable
Enable SSH if it has been disabled:
OS10(config)# ip ssh server enable