The SUSE operating system SSH daemon must be configured to not allow authentication using known hosts authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-217274	SLES-12-030200	SV-217274r603262_rule		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
SLES 12 Security Technical Implementation Guide	2022-09-13

Details

Check Text ( C-18502r369978_chk )
Verify the SUSE operating system SSH daemon is configured to not allow authentication using known hosts authentication. To determine how the SSH daemon's "IgnoreUserKnownHosts" option is set, run the following command: # sudo 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.

Check Text ( C-18502r369978_chk )

Verify the SUSE operating system SSH daemon is configured to not allow authentication using known hosts authentication.

To determine how the SSH daemon's "IgnoreUserKnownHosts" option is set, run the following command:

# sudo 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-18500r369979_fix)
Configure the SUSE operating system 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