The .Xauthority files must not have extended ACLs.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-216075 | SRG-OS-000480 | SOL-11.1-020520 | SV-216075r959010_rule | 2024-11-25 | 3 |
| 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. |
| 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. # ls -lL .Xauthority If the permissions include a "+", the file has an extended ACL and this is a finding. |
| ✔️ Fix |
|---|
| Remove the extended ACL from the file. # chmod A- .Xauthority |