STIGQter: STIG Summary: Red Hat Enterprise Linux 9 Security Technical Implementation Guide Version: 2 Release: 9 Benchmark Date: 01 Jul 2026:

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

DISA Rule

SV-258132r1134929_rule

Vulnerability Number

V-258132

Group Title

SRG-OS-000068-GPOS-00036

Rule Version

RHEL-09-631015

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 RHEL 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 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:

$ sudo 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 certificate of the user or group is mapped to the corresponding user or group in the "sssd.conf" file with the following command:

$ sudo find /etc/sssd/sssd.conf /etc/sssd/conf.d/ -type f -exec cat {} \;

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

If the certmap section does not exist, ask the SA to indicate how certificates are mapped to accounts.

If there is no evidence of certificate mapping, this is a finding.

Vulnerability Number

V-258132

Documentable

False

Rule Version

RHEL-09-631015

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 certificate of the user or group is mapped to the corresponding user or group in the "sssd.conf" file with the following command:

$ sudo find /etc/sssd/sssd.conf /etc/sssd/conf.d/ -type f -exec cat {} \;

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

If the certmap section does not exist, ask the 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

5551