If the system is using LDAP for authentication or account information, the system must use a TLS connection using FIPS 140-2 approved cryptographic algorithms.

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If the system is using LDAP for authentication or account information, the system must use a TLS connection using FIPS 140-2 approved cryptographic algorithms.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-50817	OL6-00-000252	SV-65023r1_rule		Medium

Description
The ssl directive specifies whether to use ssl or not. If not specified it will default to "no". It should be set to "start_tls" rather than doing LDAP over SSL.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2019-03-20

Details

Check Text ( C-53289r1_chk )
If the system does not use LDAP for authentication or account information, this is not applicable. To ensure LDAP is configured to use TLS for all transactions, run the following command: $ grep start_tls /etc/pam_ldap.conf If no lines are returned, this is a finding.

Fix Text (F-55611r1_fix)
Configure LDAP to enforce TLS use. First, edit the file "/etc/pam_ldap.conf", and add or correct the following lines: ssl start_tls Then review the LDAP server and ensure TLS has been configured.