The SSH daemon must be configured to only use the SSHv2 protocol.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with: CCI-001436

SV-40862r2_rule The SSH daemon must be configured to only use the SSHv2 protocol.

Vulnerability discussion

SSHv1 is not a DoD-approved protocol and has many well-known vulnerability exploits. Exploits of the SSH daemon could provide immediate root access to the system.

Check content

Examine the sshd configuration file. # cat /etc/ssh/sshd_config | grep -i "Protocol 2" If the value of "Protocol" is not set to 2, or is commented out, this is a finding.

Fix text

Edit the configuration file and modify the Protocol line. Protocol 2 Restart sshd: /sbin/init.d/secsh stop /sbin/init.d/secsh start

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