Title

If the system is using LDAP for authentication or account information, the LDAP TLS certificate authority file and/or directory (as appropriate) must not have an extended ACL. (Cat II impact)

Discussion

LDAP can be used to provide user authentication and account information, which are vital to system security. The LDAP client configuration must be protected from unauthorized modification.

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 permissions of the certificate database files. # ls -lL /var/ldap/cert8.db /var/ldap/key3.db /var/ldap/secmod.db If the permissions of any of the files contain a "+", and extended ACL is present, this is a finding.

Fix Text

Remove the extended ACL from the certificate database files. # chmod A- /var/ldap/cert8.db /var/ldap/key3.db /var/ldap/secmod.db

Additional Identifiers

Rule ID: SV-220121r603266_rule

Vulnerability ID: V-220121

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.