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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-77461 SLES-12-030200 SV-92157r1_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 2019-10-01

Details

Check Text ( C-77019r1_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-84101r1_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