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RHEL-09-255115 RHEL 9 SSH server configuration files' permissions must not be modified.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to CM-6 via CCI-000366

Title

RHEL 9 SSH server configuration files' permissions must not be modified.

Control

Verify the permissions of the "/etc/ssh/sshd_config" file with the following command: $ sudo rpm --verify openssh-server | awk '! ($2 == "c" && $1 ~ /^.\..\.\.\.\..\./) {print $0}' If the command returns any output, this is a finding.

Discussion

Service configuration files enable or disable features of their respective services, that if configured incorrectly, can lead to insecure and vulnerable configurations. Therefore, service configuration files must have correct permissions (owner, group owner, mode) to prevent unauthorized changes.

Related controls

CCI-000366

Fix

Run the following commands to restore the correct permissions of OpenSSH server configuration files: $ sudo rpm --setugids openssh-server $ sudo rpm --setperms openssh-server