Title

SLEM 5 SSH daemon public host key files must have mode 644 or less permissive. (Cat II impact)

Discussion

If a public host key file is modified by an unauthorized user, the SSH service may be compromised.

Check Content

Verify SLEM 5 SSH daemon public host key files have mode "644" or less permissive with the following command: Note: SSH public key files may be found in other directories on the system depending on the installation. > find /etc/ssh -name 'ssh_host*key.pub' -exec stat -c "%a %n" {} \; 644 /etc/ssh/ssh_host_rsa_key.pub 644 /etc/ssh/ssh_host_dsa_key.pub 644 /etc/ssh/ssh_host_ecdsa_key.pub 644 /etc/ssh/ssh_host_ed25519_key.pub If any file has a mode more permissive than "644", this is a finding.

Fix Text

Configure SLEM 5 SSH daemon public host key files have mode "644" or less permissive. Note: SSH public key files may be found in other directories on the system depending on the installation. Change the mode of public host key files under "/etc/ssh" to "644" with the following command: > sudo chmod 644 /etc/ssh/ssh_host*key.pub

Additional Identifiers

Rule ID: SV-261293r996357_rule

Vulnerability ID: V-261293

Group Title: SRG-OS-000480-GPOS-00227

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