STIGQter STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

RHEL 9 must not allow a noncertificate trusted host SSH logon to the system.

DISA Rule

SV-257992r1045047_rule

Vulnerability Number

V-257992

Group Title

SRG-OS-000480-GPOS-00229

Rule Version

RHEL-09-255080

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

To configure RHEL 9 to not allow a noncertificate trusted host SSH logon to the system, add or modify the following line in "/etc/ssh/sshd_config" or in a file in "/etc/ssh/sshd_config.d".

HostbasedAuthentication no

Restart the SSH daemon for the settings to take effect:

$ sudo systemctl restart sshd.service

Check Contents

Verify the operating system does not allow a noncertificate trusted host SSH logon to the system with the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*hostbasedauthentication'

HostbasedAuthentication no

If the "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out, this is a finding.

If the required value is not set, this is a finding.

Vulnerability Number

V-257992

Documentable

False

Rule Version

RHEL-09-255080

Severity Override Guidance

Verify the operating system does not allow a noncertificate trusted host SSH logon to the system with the following command:

$ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*hostbasedauthentication'

HostbasedAuthentication no

If the "HostbasedAuthentication" keyword is not set to "no", is missing, or is commented out, this is a finding.

If the required value is not set, this is a finding.

Check Content Reference

M

Target Key

5551