The Network File System (NFS) exports configuration file must not have an extended ACL.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22493	GEN005770	SV-46120r1_rule		Low

Description
File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. Excessive permissions on the NFS export configuration file could allow unauthorized modification of the file, which could result in Denial of Service to authorized NFS exports and the creation of additional unauthorized exports.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-43377r1_chk )
Check the permissions of the NFS export configuration file. # ls -lL /etc/exports If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix Text (F-39461r1_fix)
Remove the extended ACL from the file. # setfacl --remove-all /etc/exports