The Oracle Linux operating system must not allow users to override SSH environment variables.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-221696 | SRG-OS-000480-GPOS-00229 | OL07-00-010460 | SV-221696r991591_rule | 2025-02-20 | 3 |
| Description |
|---|
| Failure to restrict system access to authenticated users negatively impacts operating system security. |
| ℹ️ Check |
|---|
| Verify the operating system does not allow users to override environment variables to the SSH daemon. Check for the value of the "PermitUserEnvironment" keyword with the following command: # grep -i permituserenvironment /etc/ssh/sshd_config PermitUserEnvironment no If the "PermitUserEnvironment" keyword is not set to "no", is missing, or is commented out, this is a finding. |
| ✔️ Fix |
|---|
| Configure the operating system not to allow users to override environment variables to the SSH daemon. Edit the "/etc/ssh/sshd_config" file to uncomment or add the line for "PermitUserEnvironment" keyword and set the value to "no": PermitUserEnvironment no The SSH service must be restarted for changes to take effect. |