The Oracle Linux operating system must be configured so that the SSH daemon does not allow authentication using RSA rhosts authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-221850	OL07-00-040330	SV-221850r991589_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

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-221850r991589_chk)

Check the version of the operating system with the following command: # cat /etc/oracle-release If the release is 7.4 or newer this requirement is Not Applicable. Verify the SSH daemon does not allow authentication using RSA rhosts authentication. To determine how the SSH daemon's "RhostsRSAAuthentication" option is set, run the following command: # grep RhostsRSAAuthentication /etc/ssh/sshd_config RhostsRSAAuthentication no If the value is returned as "yes", the returned line is commented out, or no output is returned, this is a finding.

Fix Text (F-23554r419623_fix)

Configure the SSH daemon to not allow authentication using RSA rhosts authentication. Add the following line in "/etc/ssh/sshd_config", or uncomment the line and set the value to "no": RhostsRSAAuthentication no The SSH service must be restarted for changes to take effect.