X Windows must not be enabled unless required.

From Oracle Linux 6 Security Technical Implementation Guide

Associated with: CCI-001436

SV-65091r1_rule X Windows must not be enabled unless required.

Vulnerability discussion

Unnecessary services should be disabled to decrease the attack surface of the system.

Check content

To verify the default runlevel is 3, run the following command: # grep initdefault /etc/inittab The output should show the following: id:3:initdefault: If it does not, this is a finding.

Fix text

Setting the system's runlevel to 3 will prevent automatic startup of the X server. To do so, ensure the following line in "/etc/inittab" features a "3" as shown: id:3:initdefault:

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