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V-281216

CAT I (High)

RHEL 10 must enable the Pluggable Authentication Module (PAM) interface for SSHD.

Rule ID

SV-281216r1166600_rule

STIG

Red Hat Enterprise Linux 10 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000877

Discussion

When "UsePAM" is set to "yes", PAM runs through account and session types properly. This is important when restricted access to services based on IP, time, or other factors of the account is needed. Additionally, this ensures users can inherit certain environment variables on login or disallow access to the server.

Check Content

Verify RHEL 10 SSHD is configured to allow for the "UsePAM" interface with the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*usepam'
UsePAM yes

If the "UsePAM" keyword is set to "no", is missing, or is commented out, this is a finding.

Fix Text

Configure RHEL 10 SSHD to use the "UsePAM" interface by adding or modifying the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d".

UsePAM yes

Restart the SSH daemon with the following command for the settings to take effect:

$ sudo systemctl restart sshd.service