The .Xauthority files must not have extended ACLs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22446	GEN005190	SV-38814r1_rule	ECLP-1	Medium

Description
.Xauthority files ensure the user is authorized to access that specific X Windows host. Extended ACLs may permit unauthorized modification of these files, which could lead to Denial of Service to authorized access or allow unauthorized access to be obtained.

STIG	Date
Draft AIX Security Technical Implementation Guide	2011-08-17

Details

Check Text ( C-37054r1_chk )
Get a list of (non-system account) users and the associated home directories. # cat /etc/passwd | cut -f 1,6 -d ":" Check the file permissions for the user .Xauthority files. #aclget .Xauthority Check if extended permissions are disabled. If extended permissions are not disabled, this is a finding.

Fix Text (F-32322r1_fix)
Remove the extended ACL from the .Xauthority file(s) and disable extended permissions. #acledit .Xauthority