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The RHEL 8 SSH daemon must perform strict mode checking of home directory configuration files.


Overview

Finding ID Version Rule ID IA Controls Severity
V-230288 RHEL-08-010500 SV-230288r627750_rule Medium
Description
If other users have access to modify user-specific SSH configuration files, they may be able to log on to the system as another user.
STIG Date
Red Hat Enterprise Linux 8 Security Technical Implementation Guide 2022-06-15

Details

Check Text ( C-32957r567610_chk )
Verify the SSH daemon performs strict mode checking of home directory configuration files with the following command:

$ sudo grep -i strictmodes /etc/ssh/sshd_config

StrictModes yes

If "StrictModes" is set to "no", is missing, or the returned line is commented out, this is a finding.
Fix Text (F-32932r567611_fix)
Configure SSH to perform strict mode checking of home directory configuration files. Uncomment the "StrictModes" keyword in "/etc/ssh/sshd_config" and set the value to "yes":

StrictModes yes

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