ALMA-09-038960 - AlmaLinux OS 9 must map the authenticated identity to the user or group account for PKI-based authentication.

Information

Without mapping the certificate used to authenticate to the user account, the ability to determine the identity of the individual user or group will not be available for forensic analysis.

Solution

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

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CL_AlmaLinux_OS_9_V1R1_STIG.zip

Item Details

Category: IDENTIFICATION AND AUTHENTICATION

References: 800-53|IA-5(2)(c), CAT|II, CCI|CCI-000187, Rule-ID|SV-269411r1050294_rule, STIG-ID|ALMA-09-038960, Vuln-ID|V-269411

Plugin: Unix

Control ID: f07a238500249915ce8b16cd7dcc3d634d028d74e416be9c7880cb9d1e6d5744