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

From Oracle Linux 5 Security Technical Implementation Guide

Associated with: CCI-000297

SV-63313r1_rule .Xauthority or X*.hosts (or equivalent) file(s) must be used to restrict access to the X server.

Vulnerability discussion

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

Check content

Determine if the X server is running. Procedure: # ps -ef |grep X 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 file, where "*" is a display number 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

Create an X*.hosts file, where "*" is a display number used to limit X window connections. Add the list of authorized X clients to the file.

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