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The SSH daemon must use privilege separation.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-72265 | RHEL-07-040460 | SV-86889r2_rule | Medium |
| Description |
|---|
| SSH daemon privilege separation causes the SSH process to drop root privileges when not needed, which would decrease the impact of software vulnerabilities in the unprivileged section. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 7 Security Technical Implementation Guide | 2017-07-08 |
Details
| Check Text ( C-72499r2_chk ) |
|---|
| Verify the SSH daemon performs privilege separation. Check that the SSH daemon performs privilege separation with the following command: # grep -i usepriv /etc/ssh/sshd_config UsePrivilegeSeparation sandbox If the "UsePrivilegeSeparation" keyword is set to "no", is missing, or the retuned line is commented out, this is a finding. |
| Fix Text (F-78619r2_fix) |
|---|
| Uncomment the "UsePrivilegeSeparation" 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 "sandbox" or "yes": UsePrivilegeSeparation sandbox The SSH service must be restarted for changes to take effect. |