SLEM 5 SSH daemon must be configured to not allow authentication using known hosts authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-261340	SLEM-05-255075	SV-261340r996483_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
SUSE Linux Enterprise Micro (SLEM) 5 Security Technical Implementation Guide			2025-05-08

Related Frameworks

4 paths across 3 frameworks

NIST 800-531 mapping

CM-6

1.00

DISA · 1 · disa_xccdf · related
DISA · 2025-01-23 · disa_cci_list · equivalent

NIST 800-1712 mappings

3.4.1

1.00

DISA · 1 · 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 · 1 · 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 · 1 · disa_xccdf · related

Details

Check Text (C-261340r996483_chk)

Verify SLEM 5 SSH daemon is configured to not allow authentication using "known hosts" authentication 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*ignoreuserknownhosts' /etc/ssh/sshd_config:IgnoreUserKnownHosts yes If "IgnoreUserKnownHosts" is not set to "no", is commented out, missing, or conflicting results are returned, this is a finding.

Fix Text (F-64977r996482_fix)

Configure SLEM 5 SSH daemon to not allow authentication using "known hosts" authentication. Add or modify the following line in the "/etc/ssh/sshd_config" file: IgnoreUserKnownHosts yes Restart the SSH daemon in order for the changes to take effect: > sudo systemctl restart sshd.service