STIGQter: STIG Summary: Oracle Linux 8 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

OL 8 must implement certificate status checking for multifactor authentication.

DISA Rule

SV-248587r1015038_rule

Vulnerability Number

V-248587

Group Title

SRG-OS-000375-GPOS-00160

Rule Version

OL08-00-010400

Severity

CAT II

CCI(s)

• CCI-004046 - Implement multi-factor authentication for local; network; and/or remote access to privileged accounts; and/or non-privileged accounts such that one of the factors is provided by a device separate from the system gaining access.
• CCI-001954 - Electronically verifies Personal Identity Verification-compliant credentials.
• CCI-004047 - Implement multi-factor authentication for local; network; and/or remote access to privileged accounts; and/or non-privileged accounts such that the device meets organization-defined strength of mechanism requirements.

Weight

10

Fix Recommendation

Configure OL 8 to implement certificate status checking for multifactor authentication.

Review the "/etc/sssd/sssd.conf" file to determine if the system is configured to prevent OCSP or certificate verification.

Add the following line to the [sssd] section of the "/etc/sssd/sssd.conf" file:

certificate_verification = ocsp_dgst=sha1

The "sssd" service must be restarted for the changes to take effect. To restart the "sssd" service, run the following command:

$ sudo systemctl restart sssd.service

Check Contents

Verify the operating system implements certificate status checking for multifactor authentication.

Note: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.

Determine if Online Certificate Status Protocol (OCSP) is enabled and using the proper digest value on the system with the following command:

$ sudo grep certificate_verification /etc/sssd/sssd.conf /etc/sssd/conf.d/*.conf | grep -v "^#"

certificate_verification = ocsp_dgst=sha1

If the certificate_verification line is missing from the [sssd] section, or is missing "ocsp_dgst=sha1", ask the administrator to indicate what type of multifactor authentication is being used and how the system implements certificate status checking. If there is no evidence of certificate status checking being used, this is a finding.

Vulnerability Number

V-248587

Documentable

False

Rule Version

OL08-00-010400

Severity Override Guidance

Verify the operating system implements certificate status checking for multifactor authentication.

Note: If the system administrator (SA) demonstrates the use of an approved alternate multifactor authentication method, this requirement is not applicable.

Determine if Online Certificate Status Protocol (OCSP) is enabled and using the proper digest value on the system with the following command:

$ sudo grep certificate_verification /etc/sssd/sssd.conf /etc/sssd/conf.d/*.conf | grep -v "^#"

certificate_verification = ocsp_dgst=sha1

If the certificate_verification line is missing from the [sssd] section, or is missing "ocsp_dgst=sha1", ask the administrator to indicate what type of multifactor authentication is being used and how the system implements certificate status checking. If there is no evidence of certificate status checking being used, this is a finding.

Check Content Reference

M

Target Key

5416