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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-235007 SLES-15-040230 SV-235007r622137_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
SUSE Linux Enterprise Server 15 Security Technical Implementation Guide 2022-12-07

Details

Check Text ( C-38195r619290_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-38158r619291_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