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

From SUSE Linux Enterprise Server v11 for System z

Associated with: CCI-001436

SV-45997r2_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

Locate the sshd_config file: # more /etc/ssh/sshd_config Examine the file. If the variables 'Protocol 2,1’ or ‘Protocol 1’ are defined on a line without a leading comment, this is a finding.

Fix text

Edit the sshd_config file and set the "Protocol" setting to "2". Restart the SSH daemon. # /sbin/service sshd restart

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