Detections
Analytics

UBTU-16-030320 - The SSH private host key files must have mode 0600 or less permissive.

Information

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 '0600' with the following command:

#sudo chmod 0600 /etc/ssh/ssh_host*key

The SSH daemon must be restarted for the changes to take effect. To restart the SSH daemon, run the following command:

# sudo systemctl restart sshd.service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CAN_Ubuntu_16-04_LTS_V2R3_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-215133r610931_rule, STIG-ID|UBTU-16-030320, STIG-Legacy|SV-90525, STIG-Legacy|V-75845, Vuln-ID|V-215133

Plugin: Unix

Control ID: fb8b2991a9cbaa6eb0e7439e69c2171f47c9563d54a48e0d9d9385d8da517707