STIGQter: STIG Summary: Amazon Linux 2023 Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 01 Jul 2026:

Amazon Linux 2023 must map the authenticated identity to the user or group account for PKI-based authentication.

DISA Rule

SV-274060r1120168_rule

Vulnerability Number

V-274060

Group Title

SRG-OS-000068-GPOS-00036

Rule Version

AZLX-23-001295

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 Amazon Linux 2023 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 =<SAN>.*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 {} \;
[sssd]
config_file_version = 2
services = pam, sudo, ssh
domains = testing.test

[pam]
pam_cert_auth = True
offline_credentials_expiration = 1

[domain/testing.test]
id_provider = ldap

[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-274060

Documentable

False

Rule Version

AZLX-23-001295

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 {} \;
[sssd]
config_file_version = 2
services = pam, sudo, ssh
domains = testing.test

[pam]
pam_cert_auth = True
offline_credentials_expiration = 1

[domain/testing.test]
id_provider = ldap

[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

5700