The Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using known hosts authentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-221855 | OL07-00-040380 | SV-221855r991589_rule | CCI-000366 | medium |
| Description | ||||
| Configuring this setting for the SSH daemon provides additional assurance that remote logon via SSH will require a password, even in the event of misconfiguration elsewhere. | ||||
| STIG | Date | |||
| Oracle Linux 7 Security Technical Implementation Guide | 2025-05-08 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 3 · disa_xccdf · related
Details
Check Text (C-221855r991589_chk)
Verify the SSH daemon does not allow authentication using known hosts authentication.
To determine how the SSH daemon's "IgnoreUserKnownHosts" option is set, run the following command:
# grep -i IgnoreUserKnownHosts /etc/ssh/sshd_config
IgnoreUserKnownHosts yes
If the value is returned as "no", the returned line is commented out, or no output is returned, this is a finding.
Fix Text (F-23559r419638_fix)
Configure the SSH daemon to not allow authentication using known hosts authentication.
Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes":
IgnoreUserKnownHosts yes
The SSH service must be restarted for changes to take effect.