# CIS 1.1.21 Disable Automounting # # Description # =========== # autofs allows automatic mounting of devices, typically including CD/DVDs # and USB drives. # # Rationale # ========= # With automounting enabled anyone with physical access could attach a USB # drive or disc and have its contents available in system even if they lacked # permissions to mount it themselves. # # Audit # ===== # Run the following command to verify autofs is not enabled: # # # systemctl is-enabled autofs # disabled # # Verify result is not "enabled". # # Remediation # =========== # # Run the following command to disable autofs : # # # systemctl disable autofs # # Impact # ====== # The use portable hard drives is very common for workstation users. If your # organization allows the use of portable storage or media on workstations # and physical access controls to workstations is considered adequate there # is little value add in turning off automounting. # # Notes # ===== # This control should align with the tolerance of the use of portable drives # and optical media in the organization. On a server requiring an admin to # manually mount media can be part of defense-in-depth to reduce the risk of # unapproved software or information being introduced or proprietary software # or information being exfiltrated. If admins commonly use flash drives and # Server access has sufficient physical controls, requiring manual mounting # may not increase security. # parameters: linux: system: service: autofs: status: disabled