Title

The macOS system must disable Trivial File Transfer Protocol (TFTP) service. (Cat I impact)

Discussion

If the system does not require TFTP support, it is nonessential and must be disabled. The information system must be configured to provide only essential capabilities. Disabling TFTP helps prevent the unauthorized connection of devices and unauthorized transfer of information. Note: TFTP service is disabled at startup by default. Satisfies: SRG-OS-000074-GPOS-00042, SRG-OS-000080-GPOS-00048

Check Content

Verify the macOS system is configured to disable TFTP service with the following command: result="FAIL" enabled=$(/bin/launchctl print-disabled system | /usr/bin/grep '"com.apple.tftpd" => enabled') running=$(/bin/launchctl print system/com.apple.tftpd 2>/dev/null) if [[ -z "$running" ]] && [[ -z "$enabled" ]]; then result="PASS" elif [[ -n "$running" ]]; then result=result+" RUNNING" elif [[ -n "$enabled" ]]; then result=result+" ENABLED" fi echo $result If the result is not "PASS", this is a finding.

Fix Text

Configure the macOS system to disable TFTP service with the following commands: /bin/launchctl bootout system/com.apple.tftpd /bin/launchctl disable system/com.apple.tftpd The system may need a restart for the update to take effect.

Additional Identifiers

Rule ID: SV-277108r1149417_rule

Vulnerability ID: V-277108

Group Title: SRG-OS-000074-GPOS-00042

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.