The Oracle Linux operating system must be configured so that the SSH daemon performs strict mode checking of home directory configuration files.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-221862 | OL07-00-040450 | SV-221862r991589_rule | CCI-000366 | 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 | |||
| 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-221862r991589_chk)
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 Text (F-23566r419659_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.