Title

The SSH daemon must only listen on management network addresses unless authorized for uses other than management. (Cat II impact)

Discussion

The SSH daemon should only listen on network addresses designated for management traffic. If the system has multiple network interfaces and SSH listens on addresses not designated for management traffic, the SSH service could be subject to unauthorized access. If SSH is used for purposes other than management, such as providing an SFTP service, the list of approved listening addresses may be documented.

Check Content

Ask the SA to identify which interfaces on the system are designated for management traffic. If all interfaces on the system are authorized for management traffic, this is not applicable. Check the SSH daemon configuration for listening network addresses. # grep -i Listen /etc/ssh/sshd_config | grep -v '^#' If no configuration is returned, or if a returned 'Listen' configuration contains addresses not designated for management traffic, this is a finding.

Fix Text

Edit the SSH daemon configuration to specify listening network addresses designated for management traffic. Restart the SSH daemon. # /sbin/service sshd restart

Additional Identifiers

Rule ID: SV-46002r2_rule

Vulnerability ID: V-22457

Group Title: GEN005504

Expert Comments

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