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1.331 OL09-00-002502

Information

OL 9 SSH private host key files must have mode 0640 or less permissive.

GROUP ID: V-271771
RULE ID: SV-271771r1092025

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

Solution

Configure the mode of SSH private host key files under "/etc/ssh" to "0640" with the following command:

$ sudo chmod 0640 /etc/ssh/ssh_host*key

Restart the SSH daemon for the changes to take effect:

$ sudo systemctl restart sshd.service

See Also

https://workbench.cisecurity.org/benchmarks/27024

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CCI|CCI-000366, Rule-ID|SV-271771r1092025_rule, STIG-ID|OL09-00-002502, Vuln-ID|V-271771

Plugin: Unix

Control ID: 91af81c2e377507d1c019bad7fcf5c4c12fea99f5faa2ea74b743d217a5c480a