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If the system is using LDAP for authentication or account information, the system must verify the LDAP servers certificate has not been revoked.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22558 GEN008040 SV-63357r1_rule DCNR-1 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
Oracle Linux 5 Security Technical Implementation Guide 2015-06-05

Details

Check Text ( C-52069r2_chk )
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 the NSS LDAP client is configured to check certificates against a certificate revocation list.

# grep -i '^tls_crlcheck' /etc/ldap.conf

If the setting does not exist, or the value is not "all", this is a finding.
Fix Text (F-53955r1_fix)
Edit "/etc/ldap.conf" and add or set the "tls_crlcheck" setting to "all".