The OL 9 file system automounter must be disabled.

STIG ID: OL09-00-002000  |  SRG: SRG-OS-000114-GPOS-00059 |  Severity: medium (CAT II)  |  CCI: CCI-000778,CCI-001958 |  Vulnerability Id: V-271639

Vulnerability Discussion

Without identifying devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity.

Peripherals include, but are not limited to, such devices as flash drives, external storage, and printers.

Satisfies: SRG-OS-000114-GPOS-00059, SRG-OS-000378-GPOS-00163

Check

Verify that OL 9 file system automount function has been disabled and masked with the following command:

$ systemctl is-enabled autofs
masked

If the returned value is not "masked", "disabled", or "not-found", this is a finding.

Fix

Configure OL 9 to disable and mask the ability to automount devices.

The autofs service can be disabled and masked with the following command:

$ sudo systemctl mask --now autofs.service