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The SUSE operating system must not allow users to override SSH environment variables.


Overview

Finding ID Version Rule ID IA Controls Severity
V-217269 SLES-12-030151 SV-217269r877377_rule Medium
Description
SSH environment options potentially allow users to bypass access restriction in some configurations.
STIG Date
SLES 12 Security Technical Implementation Guide 2023-06-02

Details

Check Text ( C-18497r369963_chk )
Verify the SUSE operating system disables unattended via SSH.

Check that unattended logon via SSH is disabled with the following command:

# sudo grep -i "permituserenvironment" /etc/ssh/sshd_config

PermitUserEnvironment no

If the "PermitUserEnvironment" keyword is not set to "no", is missing completely, or is commented out, this is a finding.
Fix Text (F-18495r369964_fix)
Configure the SUSE operating system disables unattended logon via SSH.

Add or edit the following lines in the "/etc/ssh/sshd_config" file:

PermitUserEnvironment no