V-261294

Discussion

If an unauthorized user obtains the private SSH host key file, the host could be impersonated.

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Verify SLEM 5 SSH daemon private host key files have mode "640" or less permissive.

The following command will find all SSH private key files on the system with the following command:

     > sudo find / -name '*ssh_host*key' -exec ls -lL {} \;

Check the mode of the private host key files under "/etc/ssh" file with the following command:

     > find /etc/ssh -name 'ssh_host*key' -exec stat -c "%a %n" {} \;

     640 /etc/ssh/ssh_host_rsa_key
     640 /etc/ssh/ssh_host_dsa_key
     640 /etc/ssh/ssh_host_ecdsa_key
     640 /etc/ssh/ssh_host_ed25519_key

If any file has a mode more permissive than "640", this is a finding.