STIGQter: STIG Summary: Cloud Linux AlmaLinux OS 9 Security Technical Implementation Guide Version: 1 Release: 7 Benchmark Date: 01 Jul 2026:

AlmaLinux OS 9 must map the authenticated identity to the user or group account for PKI-based authentication.

DISA Rule

SV-269411r1050294_rule

Vulnerability Number

V-269411

Group Title

SRG-OS-000068-GPOS-00036

Rule Version

ALMA-09-038960

Severity

CAT II

CCI(s)

• CCI-000187 - For public key-based authentication, map the authenticated identity to the account of the individual or group.

Weight

10

Fix Recommendation

Configure AlmaLinux OS 9 to map the authenticated identity to the user or group account by adding or modifying the certmap section of the "/etc/sssd/sssd.conf" file or a "*.conf" file within the "/etc/sssd/conf.d/" directory, based on the following example:

[certmap/testing.test/rule_name]
matchrule = .*EDIPI@mil
maprule = (userCertificate;binary={cert!bin})
domains = testing.test

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

$ systemctl restart sssd.service

Check Contents

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

Verify the operating system implements Online Certificate Status Protocol (OCSP) and is using the proper digest value on the system with the following command:

$ grep certmap /etc/sssd/sssd.conf /etc/sssd/conf.d/*.conf

/etc/sssd/conf.d/mapping.conf:[certmap/testing.test/rule_name]

If the certmap section does not exist, ask the system administrator (SA) to indicate how certificates are mapped to accounts. If there is no evidence of certificate mapping, this is a finding.

Vulnerability Number

V-269411

Documentable

False

Rule Version

ALMA-09-038960

Severity Override Guidance

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

Verify the operating system implements Online Certificate Status Protocol (OCSP) and is using the proper digest value on the system with the following command:

$ grep certmap /etc/sssd/sssd.conf /etc/sssd/conf.d/*.conf

/etc/sssd/conf.d/mapping.conf:[certmap/testing.test/rule_name]

If the certmap section does not exist, ask the system administrator (SA) to indicate how certificates are mapped to accounts. If there is no evidence of certificate mapping, this is a finding.

Check Content Reference

M

Target Key

5664