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-22555	GEN007980	SV-37627r1_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 protection.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2013-04-10

Details

Check Text ( C-36827r2_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. Check if NSS LDAP is using TLS. # grep '^ssl start_tls' /etc/ldap.conf If no lines are returned, this is a finding. Check if NSS LDAP TLS is using only FIPS 140-2 approved cryptographic algorithms. # grep '^tls_ciphers' /etc/ldap.conf If the line is not present, or contains ciphers not approved by FIPS 140-2, this is a finding. FIPS approved ciphers include 3DES and AES. FIPS approved hashes include the SHA hash family.

Check Text ( C-36827r2_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.
Check if NSS LDAP is using TLS.
# grep '^ssl start_tls' /etc/ldap.conf
If no lines are returned, this is a finding.
Check if NSS LDAP TLS is using only FIPS 140-2 approved cryptographic algorithms.
# grep '^tls_ciphers' /etc/ldap.conf
If the line is not present, or contains ciphers not approved by FIPS 140-2, this is a finding. FIPS approved ciphers include 3DES and AES. FIPS approved hashes include the SHA hash family.

Fix Text (F-31665r1_fix)
Edit "/etc/ldap.conf" and add a "ssl start_tls" and "tls_ciphers" options with only FIPS 140-2 approved ciphers.