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The .Xauthority files must not have extended ACLs.


Overview

Finding ID Version Rule ID IA Controls Severity
V-216075 SOL-11.1-020520 SV-216075r603268_rule Medium
Description
.Xauthority files ensure the user is authorized to access the 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
Solaris 11 X86 Security Technical Implementation Guide 2021-11-23

Details

Check Text ( C-17313r372607_chk )
If X Display Manager (XDM) is not used on the system, this is not applicable.

Determine if XDM is running.

Procedure:
# ps -ef | grep xdm

Check the file permissions for the .Xauthority files.
# ls -lL .Xauthority

If the permissions include a "+", the file has an extended ACL and this is a finding.
Fix Text (F-17311r372608_fix)
Remove the extended ACL from the file.

# chmod A- .Xauthority