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The X server must have the correct options enabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-1021 GEN000000-LNX00360 SV-37207r1_rule ECSC-1 Medium
Description
Without the correct options enabled, the Xwindows system would be less secure and there would be no screen timeout.
STIG Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide 2014-07-02

Details

Check Text ( None )
None
Fix Text (F-31154r1_fix)
Enable the following options: -audit (at level 4), -auth and -s with 15 minutes as the timeout value.

Procedure for gdm:
Edit /etc/gdm/custom.conf and add the following:
[server-Standard]
name=Standard server
command=/usr/bin/Xorg -br -audit 4 -s 15
chooser=false
handled=true
flexible=true
priority=0

Procedure for xinit:
Edit or create a .xserverrc file in the users home directory containing the startup script for xinit.
This script must have an exec line with at least these options:

exec /usr/bin/X -audit 4 -s 15 -auth &

The is created using the "xauth" command and is customarily located in the users home directory with the name ".Xauthority".