STIGQter: STIG Summary: Solaris 11 X86 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

X displays must not be exported to the world.

DISA Rule

SV-216076r603268_rule

Vulnerability Number

V-216076

Group Title

SRG-OS-000480

Rule Version

SOL-11.1-020530

Severity

CAT I

CCI(s)

• CCI-000225 - The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.
• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

If using an xhost-type authentication the xhost - command can be used to remove current trusted hosts and then selectively allow only trusted hosts to connect with xhost + commands. A cryptographically secure authentication, such as provided by the xauth program, is always preferred. Refer to your X11 server's documentation for further security information.

Check Contents

If X Windows is not used on the system, this is not applicable.

Check the output of the xhost command from an X terminal.

Procedure:
$ xhost
If the output reports access control is enabled (and possibly lists the hosts that can receive X Window logins), this is not a finding. If the xhost command returns a line indicating access control is disabled, this is a finding.

NOTE: It may be necessary to define the display if the command reports it cannot open the display.

Procedure:
$ DISPLAY=MachineName:0.0; export DISPLAY
MachineName may be replaced with an Internet Protocol Address. Repeat the check procedure after setting the display.

Vulnerability Number

V-216076

Documentable

False

Rule Version

SOL-11.1-020530

Severity Override Guidance

If X Windows is not used on the system, this is not applicable.

Check the output of the xhost command from an X terminal.

Procedure:
$ xhost
If the output reports access control is enabled (and possibly lists the hosts that can receive X Window logins), this is not a finding. If the xhost command returns a line indicating access control is disabled, this is a finding.

NOTE: It may be necessary to define the display if the command reports it cannot open the display.

Procedure:
$ DISPLAY=MachineName:0.0; export DISPLAY
MachineName may be replaced with an Internet Protocol Address. Repeat the check procedure after setting the display.

Check Content Reference

M

Target Key

4021

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