.Xauthority or X*.hosts (or equivalent) file(s) must be used to restrict access to the X server.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-216312	SOL-11.1-020540	SV-216312r603857_rule		Medium

Description
If access to the X server is not restricted, a user's X session may be compromised.

STIG	Date
Solaris 11 SPARC Security Technical Implementation Guide	2021-11-23

Details

Check Text ( C-17548r622320_chk )
If X Display Manager (XDM) is not used on the system, this is not applicable. Determine if XDM is running. Procedure: # ps -ef \| grep xdm Determine if xauth is being used. Procedure: # xauth xauth> list If the above command sequence does not show any host other than the localhost, then xauth is not being used. Search the system for an X.hosts files, where is a display number that may be used to limit X window connections. If no files are found, X.hosts files are not being used. If the X.hosts files contain any unauthorized hosts, this is a finding. If both xauth and X*.hosts files are not being used, this is a finding.

Check Text ( C-17548r622320_chk )

If X Display Manager (XDM) is not used on the system, this is not applicable.

Determine if XDM is running.

Procedure:
# ps -ef | grep xdm

Determine if xauth is being used.

Procedure:
# xauth
xauth> list

If the above command sequence does not show any host other than the localhost, then xauth is not being used.

Search the system for an X*.hosts files, where * is a display number that may be used to limit X window connections.

If no files are found, X*.hosts files are not being used.

If the X*.hosts files contain any unauthorized hosts, this is a finding.

If both xauth and X*.hosts files are not being used, this is a finding.

Fix Text (F-17546r371025_fix)
Create an X.hosts file, where is a display number that may be used to limit X window connections. Add the list of authorized X clients to the file.