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View File tests_network_allowed_ports of Package lynis (Project security)

#!/bin/bash

#################################################################################
#
# Author: Thomas Biege <thomas@suse.de>
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Verifies open network ports.
#
#################################################################################
#
# TODO:
#
################################################################################
#
    InsertSection "Networking"
#
#################################################################################
#
    # Test        : NETW-3085
    # Description : Verifies open network ports.
    Register --test-no NETW-3085 --weight L --network NO --description "Verifies open network ports."
    if [ ${SKIPTEST} -eq 0 ]; then
	ALLOWED_PORTS=( 22 25 80 111 443 )
	TMP=$(mktemp /tmp/lynis.XXXXXX)

	STR="${ALLOWED_PORTS[@]:0}"
	Display --indent 2 --text "- Starting verifying open network ports ($STR)..."
	logtext "Test: Checking open network ports"
  	logtext "Allowed ports: $STR"

	netstat -an | grep -i listen > $TMP
	PORTS=($(cat $TMP | awk '{ print $4 }' | sed 's/.*://;s/ACC//' | sort -un))


	IDX_P=0
	LEN_P=${#PORTS[@]}
	NUM_NOTOK=0
	while [ $IDX_P -lt $LEN_P ]
	do
		IDX_A=0
		LEN_A=${#ALLOWED_PORTS[@]}
		PORTOK=0
		while [ $IDX_A -lt $LEN_A ]
		do
#  			echo "${PORTS[$IDX_P]} vs. ${ALLOWED_PORTS[$IDX_A]}"
			if [ ${PORTS[$IDX_P]} == ${ALLOWED_PORTS[$IDX_A]} ]
			then
				PORTOK=1
				break
			fi
			((IDX_A++))
		done
		if [ $PORTOK -eq 0 ]
		then
			((NUM_NOTOK++))
			P=${PORTS[$IDX_P]}
			Display --indent 4 --text "Open port ${P} not allowed" --result WARNING --color RED
		fi

		((IDX_P++))
	done

	HPMAX=$LEN_A
	HP=$(expr $LEN_A - $NUM_NOTOK)
	if [ $HP -lt 0 ]; then HP=0; fi

	AddHP $HP $HPMAX

	rm -f $TMP
    fi
#
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#

wait_for_keypress

#
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