The Oracle Linux operating system must be configured so that the SSH daemon performs strict mode checking of home directory configuration files.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-221862 | SRG-OS-000480-GPOS-00227 | OL07-00-040450 | SV-221862r991589_rule | 2025-02-20 | 3 |
| 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. |
| ℹ️ Check |
|---|
| Verify the SSH daemon performs strict mode checking of home directory configuration files. The location of the "sshd_config" file may vary if a different daemon is in use. Inspect the "sshd_config" file with the following command: # 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 |
|---|
| Uncomment the "StrictModes" keyword in "/etc/ssh/sshd_config" (this file may be named differently or be in a different location if using a version of SSH that is provided by a third-party vendor) and set the value to "yes": StrictModes yes The SSH service must be restarted for changes to take effect. |