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

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.

Additional Identifiers

Rule ID: SV-227892r603266_rule

Vulnerability ID: V-227892

Group Title: SRG-OS-000480

Expert Comments

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