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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is using LDAP for authentication or account information, the system must verify the LDAP servers certificate has not been revoked.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-46285r1_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 2016-12-20

Details

Check Text ( C-36834r1_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-31672r1_fix)
Edit "/etc/ldap.conf" and add or set the "tls_crlcheck" setting to "all".