STIGQter: STIG Summary: Red Hat Enterprise Linux 10 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

RHEL 10 must not allow users to override Secure Shell (SSH) environment variables.

DISA Rule

SV-281267r1184767_rule

Vulnerability Number

V-281267

Group Title

SRG-OS-000095-GPOS-00049

Rule Version

RHEL-10-700640

Severity

CAT I

CCI(s)

• CCI-000381 - Configure the system to provide only organization-defined mission essential capabilities.

Weight

10

Fix Recommendation

Configure RHEL 10 to disable unattended or automatic login via SSH.

In "/etc/ssh/sshd_config.d", create a drop file that will lexicographically precede 50-redhat.conf and add the following line:

PermitUserEnvironment no

Restart the SSH daemon with the following command for the setting to take effect:

$ sudo systemctl restart sshd.service

Check Contents

Verify RHEL 10 disables unattended or automatic login via SSH 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*permituserenvironment'
/etc/ssh/sshd_config.d/10-stig.conf:PermitUserEnvironment no

Verify the runtime setting with the following command:

$ sudo sshd -T | grep -i permituserenvironment
permituserenvironment no

If the "PermitUserEnvironment" keyword is not set to "no" in a drop-in that lexicographically precedes 50-redhat.conf, or if no output is returned, this is a finding.

Vulnerability Number

V-281267

Documentable

False

Rule Version

RHEL-10-700640

Severity Override Guidance

Verify RHEL 10 disables unattended or automatic login via SSH 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*permituserenvironment'
/etc/ssh/sshd_config.d/10-stig.conf:PermitUserEnvironment no

Verify the runtime setting with the following command:

$ sudo sshd -T | grep -i permituserenvironment
permituserenvironment no

If the "PermitUserEnvironment" keyword is not set to "no" in a drop-in that lexicographically precedes 50-redhat.conf, or if no output is returned, this is a finding.

Check Content Reference

M

Target Key

5733