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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-38625 RHEL-06-000252 SV-50426r1_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
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2015-05-26

Details

Check Text ( C-46184r1_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-43574r1_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.