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The Red Hat Enterprise Linux operating system must implement cryptography to protect the integrity of Lightweight Directory Access Protocol (LDAP) communications.


Overview

Finding ID Version Rule ID IA Controls Severity
V-204583 RHEL-07-040200 SV-204583r603261_rule Medium
Description
Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Cryptographic mechanisms used for protecting the integrity of information include, for example, signed hash functions using asymmetric cryptography enabling distribution of the public key to verify the hash information while maintaining the confidentiality of the key used to generate the hash.
STIG Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide 2021-03-01

Details

Check Text ( C-4707r88941_chk )
If LDAP is not being utilized, this requirement is Not Applicable.

Verify the operating system implements cryptography to protect the integrity of remote LDAP access sessions.

To determine if LDAP is being used for authentication, use the following command:

# systemctl status sssd.service
sssd.service - System Security Services Daemon
Loaded: loaded (/usr/lib/systemd/system/sssd.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2018-06-27 10:58:11 EST; 1h 50min ago

If the "sssd.service" is "active", then LDAP is being used.

Determine the "id_provider" that the LDAP is currently using:

# grep -i "id_provider" /etc/sssd/sssd.conf

id_provider = ad

If "id_provider" is set to "ad", this is Not Applicable.

Check the path to the X.509 certificate for peer authentication with the following command:

# grep -i tls_cacert /etc/sssd/sssd.conf

ldap_tls_cacert = /etc/pki/tls/certs/ca-bundle.crt

Verify the "ldap_tls_cacert" option points to a file that contains the trusted CA certificate.

If this file does not exist, or the option is commented out or missing, this is a finding.
Fix Text (F-4707r88942_fix)
Configure the operating system to implement cryptography to protect the integrity of LDAP remote access sessions.

Add or modify the following line in "/etc/sssd/sssd.conf":

ldap_tls_cacert = /etc/pki/tls/certs/ca-bundle.crt