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V-274857

CAT I (High)

Ubuntu 20.04 LTS must map the authenticated identity to the user or group account for PKI-based authentication.

Rule ID

SV-274857r1101692_rule

STIG

Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide

Version

V2R4

CCIs

CCI-000187

Discussion

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.

Check Content

Verify that authenticated certificates are mapped to the appropriate user group in the "/etc/sssd/sssd.conf" file with the following command: 
 
$ grep -i ldap_user_certificate /etc/sssd/sssd.conf
ldap_user_certificate=userCertificate;binary

Fix Text

Configure sssd to map authenticated certificates to the appropriate user group by adding the following line to the "/etc/sssd/sssd.conf" file:

ldap_user_certificate=userCertificate;binary