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Disable Kerberos by removing host keytab

An XCCDF Rule

Description

Kerberos is not an approved key distribution method for Common Criteria. To prevent using Kerberos by system daemons, remove the Kerberos keytab files, especially /etc/krb5.keytab.

Rationale

The key derivation function (KDF) in Kerberos is not FIPS compatible.

ID
xccdf_org.ssgproject.content_rule_kerberos_disable_no_keytab
Severity
Medium
References
Updated



Remediation - Ansible

- name: Find keytab files
  find:
    paths: /etc/
    patterns: '*.keytab'
  register: keytab_files
  when: ansible_virtualization_type not in ["docker", "lxc", "openvz", "podman", "container"]

Remediation - Shell Script

# Remediation is applicable only in certain platforms
if [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ]; then

rm -f /etc/*.keytab

else