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V-22558

CAT II (Medium)

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is using LDAP for authentication or account information, the system must verify the LDAP servers certificate has not been revoked.

Rule ID

SV-46285r1_rule

STIG

SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Version

V1R12

CCIs

CCI-000185

Discussion

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.

Check Content

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

Edit "/etc/ldap.conf" and add or set the "tls_crlcheck" setting to "all".