STIGQter: STIG Summary: Oracle Linux 7 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The Oracle Linux operating system must be configured so that the SSH daemon performs strict mode checking of home directory configuration files.

DISA Rule

SV-221862r603260_rule

Vulnerability Number

V-221862

Group Title

SRG-OS-000480-GPOS-00227

Rule Version

OL07-00-040450

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Uncomment the "StrictModes" keyword in "/etc/ssh/sshd_config" (this file may be named differently or be in a different location if using a version of SSH that is provided by a third-party vendor) and set the value to "yes":

StrictModes yes

The SSH service must be restarted for changes to take effect.

Check Contents

Verify the SSH daemon performs strict mode checking of home directory configuration files.

The location of the "sshd_config" file may vary if a different daemon is in use.

Inspect the "sshd_config" file with the following command:

# grep -i strictmodes /etc/ssh/sshd_config

StrictModes yes

If "StrictModes" is set to "no", is missing, or the returned line is commented out, this is a finding.

Vulnerability Number

V-221862

Documentable

False

Rule Version

OL07-00-040450

Severity Override Guidance

Verify the SSH daemon performs strict mode checking of home directory configuration files.

The location of the "sshd_config" file may vary if a different daemon is in use.

Inspect the "sshd_config" file with the following command:

# grep -i strictmodes /etc/ssh/sshd_config

StrictModes yes

If "StrictModes" is set to "no", is missing, or the returned line is commented out, this is a finding.

Check Content Reference

M

Target Key

4089

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