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The .Xauthority files must not have extended ACLs.


Overview

Finding ID Version Rule ID IA Controls Severity
V-22446 GEN005190 SV-45919r1_rule Medium
Description
.Xauthority files ensure the user is authorized to access specific X Windows host. Extended ACLs may permit unauthorized modification of these files, which could lead to Denial of Service to authorized access or allow unauthorized access to be obtained.
STIG Date
SUSE Linux Enterprise Server v11 for System z 2016-12-20

Details

Check Text ( C-43227r1_chk )
Check the file permissions for the .Xauthority files.

Procedure:
# ls -la |egrep "(\.Xauthority|\.xauth)"
If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.
Fix Text (F-39297r1_fix)
Remove the extended ACL from the file.
# setfacl --remove-all .Xauthority