All .Xauthority files must have mode 0600 or less permissive.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-216309 | SRG-OS-000480 | SOL-11.1-020510 | SV-216309r959010_rule | 2024-11-25 | 3 |
| Description |
|---|
| .Xauthority files ensure the user is authorized to access the specific X Windows host. Excessive permissions may permit unauthorized modification of these files, which could lead to Denial of Service to authorized access or allow unauthorized access to be obtained. |
| ℹ️ Check |
|---|
| 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 in the home directories of users of X. Procedure: # cd ~<X user> # ls -lL .Xauthority If the file mode is more permissive than 0600, this is finding. |
| ✔️ Fix |
|---|
| Change the mode of the .Xauthority files. Procedure: # chmod 0600 .Xauthority |