The Ubuntu operating system must map the authenticated identity to the user or group account for PKI-based authentication.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-100855	UBTU-18-010426	SV-109959r1_rule		High

Description
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.

STIG	Date
Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide	2020-05-29

Details

Check Text ( C-99719r1_chk )
Verify the Ubuntu operating system has the 'libpam-pkcs11’ package installed, by running the following command: # dpkg -l \| grep libpam-pkcs11 If "libpam-pkcs11" is not installed, this is a finding. Check if use_mappers is set to pwent in /etc/pam_pkcs11/pam_pkcs11.conf file # grep use_mappers /etc/pam_pkcs11/pam_pkcs11.conf use_mappers = pwent If ‘use_mappers’ is not found or is not set to pwent this is a finding.

Check Text ( C-99719r1_chk )

Verify the Ubuntu operating system has the 'libpam-pkcs11’ package installed, by running the following command:

# dpkg -l | grep libpam-pkcs11

If "libpam-pkcs11" is not installed, this is a finding.

Check if use_mappers is set to pwent in /etc/pam_pkcs11/pam_pkcs11.conf file
# grep use_mappers /etc/pam_pkcs11/pam_pkcs11.conf
use_mappers = pwent

If ‘use_mappers’ is not found or is not set to pwent this is a finding.

Fix Text (F-106545r3_fix)
Install libpam-pkcs11 package on the system. Set use_mappers=pwent in /etc/pam_pkcs11/pam_pkcs11.conf If the system is missing an "/etc/pam_pkcs11/" directory and an "/etc/pam_pkcs11/pam_pkcs11.conf", find an example to copy into place and modify accordingly at "/usr/share/doc/libpam-pkcs11/examples/pam_pkcs11.conf.example.gz".