If the system is using LDAP for authentication or account information, certificates used to authenticate to the LDAP server must be provided from DoD PKI or a DoD-approved external PKI.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22556	GEN008000	SV-45998r1_rule		Medium

Description
LDAP can be used to provide user authentication and account information, which are vital to system security. Communication between an LDAP server and a host using LDAP requires authentication.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-43281r1_chk )
Verify the source of the LDAP certificates Check if the system is using NSS LDAP. # grep -v '^#' /etc/nsswitch.conf \| grep ldap If no lines are returned, this vulnerability is not applicable. Verify with the SA that the system is connected to the GIG. If the system part of a stand alone network which is not connected to the GIG this vulnerability is not applicable. Verify a certificate is used for client authentication to the server. # grep -i '^tls_cert' /etc/ldap.conf If no line is found, this is a finding. List the certificate issuer. # openssl x509 -text -in If the certificate is not issued by DoD PKI or a DoD-approved external PKI, this is a finding.

Check Text ( C-43281r1_chk )

Verify the source of the LDAP certificates
Check if the system is using NSS LDAP.
# grep -v '^#' /etc/nsswitch.conf | grep ldap
If no lines are returned, this vulnerability is not applicable.

Verify with the SA that the system is connected to the GIG.
If the system part of a stand alone network which is not connected to the GIG this vulnerability is not applicable.

Verify a certificate is used for client authentication to the server.
# grep -i '^tls_cert' /etc/ldap.conf
If no line is found, this is a finding.

List the certificate issuer.
# openssl x509 -text -in
If the certificate is not issued by DoD PKI or a DoD-approved external PKI, this is a finding.

Fix Text (F-39364r1_fix)
Edit "/etc/ldap.conf" and add or edit the 'tls_cert' setting to reference a file containing a client certificate issued by DoD PKI or a DoD-approved external PKI.