Initial import

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+#!/bin/sh
+
+#################################################################################
+#
+#   Lynis
+# ------------------
+#
+# Copyright 2007-2014, Michael Boelen (michael@rootkit.nl), The Netherlands
+# Web site: http://www.rootkit.nl
+#
+# 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.
+#
+#################################################################################
+#
+# Squid
+#
+#################################################################################
+#
+    SQUID_DAEMON_CONFIG_LOCS="/etc /etc/squid /etc/squid3 /usr/local/etc/squid /usr/local/squid/etc"
+    SQUID_DAEMON_CONFIG=""
+    SQUID_DAEMON_UNSAFE_PORTS_LIST="22 23 25"
+    SQUID_DAEMON_RUNNING=0
+#
+#################################################################################
+#
+    InsertSection "Squid Support"
+#
+#################################################################################
+#
+    # Test        : SQD-3602
+    # Description : Check for a running Squid daemon
+    # Notes       : Search for squid(3) with a space, to avoid SquidGuard and other
+    #               programs.
+    Register --test-no SQD-3602 --weight L --network NO --description "Check for running Squid daemon"
+    if [ ${SKIPTEST} -eq 0 ]; then
+        logtext "Test: Searching for a Squid daemon..."
+        FOUND=0
+        # Check running processes
+        FIND=`${PSBINARY} ax | egrep "(squid|squid3) " | grep -v "grep"`
+        if [ ! "${FIND}" = "" ]; then
+            SQUID_DAEMON_RUNNING=1
+            logtext "Result: Squid daemon is running"
+            Display --indent 2 --text "- Checking running Squid daemon..." --result FOUND --color GREEN
+          else
+            logtext "Result: No running Squid daemon found"
+            Display --indent 2 --text "- Checking running Squid daemon..." --result "NOT FOUND" --color WHITE
+        fi
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3604
+    # Description : Determine Squid daemon configuration file location
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3604 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid daemon file location"
+    if [ ${SKIPTEST} -eq 0 ]; then
+        logtext "Action: searching for squid.conf or squid3.conf file"
+        for I in ${SQUID_DAEMON_CONFIG_LOCS}; do
+            # Checking squid.conf
+            if [ -f "${I}/squid.conf" ]; then
+              logtext "Result: ${I}/squid.conf exists"
+              SQUID_DAEMON_CONFIG="${I}/squid.conf"
+            fi
+            # Checking squid3.conf
+            if [ -f "${I}/squid3.conf" ]; then
+              logtext "Result: ${I}/squid3.conf exists"
+              SQUID_DAEMON_CONFIG="${I}/squid3.conf"
+            fi
+        done
+        if [ "${SQUID_DAEMON_CONFIG}" = "" ]; then
+            logtext "Result: No Squid configuration file found"
+            Display --indent 4 --text "- Searching Squid configuration file..." --result "NOT FOUND" --color YELLOW
+          else
+            logtext "Result: using last found configuration file: ${SQUID_DAEMON_CONFIG}"
+            Display --indent 4 --text "- Searching Squid configuration..." --result FOUND --color GREEN
+        fi
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3606
+    # Description : Check Squid version
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3606 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid version"
+    if [ ${SKIPTEST} -eq 0 ]; then
+	if [ ! "${SQUIDBINARY}" = "" ]; then
+	    logtext "Result: Squid binary found (${SQUIDBINARY})"
+	    # Skip check if a setuid/setgid bit is found
+	    FIND=`find ${SQUIDBINARY} \( -perm 4000 -o -perm 2000 \) -print`
+	    if [ "${FIND}" = "" ]; then
+		FIND2=`${SQUIDBINARY} -v | awk '{ if ($3=="Version") { print $4 } }'`
+	        Display --indent 4 --text "- Checking Squid version..." --result "FOUND" --color GREEN
+		SQUID_VERSION="${FIND2}"
+	      else
+	        logtext "Result: test skipped for security reasons, setuid/setgid bit set"
+	        Display --indent 4 --text "- Checking Squid version..." --result "SKIPPED" --color RED
+	    fi
+	  else
+	    logtext "Result: no Squid binary found"
+	fi
+    fi
+#
+#################################################################################
+#
+#    # Test        : SQD-3608
+#    # Description : Check Squid build options
+#    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+#    Register --test-no SQD-3608 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid version"
+#    if [ ${SKIPTEST} -eq 0 ]; then
+#    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3610
+    # Description : Check Squid configuration options
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3610 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid version"
+    if [ ${SKIPTEST} -eq 0 ]; then
+        logtext "Test: Checking all specific defined options in ${SQUID_DAEMON_CONFIG}"
+	FIND=`cat ${SQUID_DAEMON_CONFIG} | grep -v "^#" | grep -v "^$" | ${AWKBINARY} '{gsub("\t"," ");print}' | sed 's/ /!space!/g'`
+	for I in ${FIND}; do
+	    I=`echo ${I} | sed 's/!space!/ /g'`
+	    logtext "Found Squid option: ${I}"
+	done
+	Display --indent 4 --text "- Checking defined Squid options..." --result "DONE" --color GREEN
+    fi
+#
+#################################################################################
+#
+#    # Test        : SQD-3612
+#    # Description : Check Squid additional configuration files
+#    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+#    Register --test-no SQD-3612 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check additional Squid configuration files"
+#    if [ ${SKIPTEST} -eq 0 ]; then
+#    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3613
+    # Description : Check Squid configuration options
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3613 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid file permissions"
+    if [ ${SKIPTEST} -eq 0 ]; then
+        logtext "Test: Checking file permissions of ${SQUID_DAEMON_CONFIG}"
+        FIND=`find ${SQUID_DAEMON_CONFIG} -type f -a \( -perm -004 -o -perm -002 -o -perm -001 \)`
+        if [ ! "${FIND}" = "" ]; then
+            logtext "Result: file ${SQUID_DAEMON_CONFIG} is world readable, writable or executable and could leak information or passwords"
+            Display --indent 4 --text "- Checking Squid configuration file permissions..." --result WARNING --color RED
+            ReportSuggestion ${TEST_NO} "Check file permissions of ${SQUID_DAEMON_CONFIG} to limit access"
+            ReportWarning ${TEST_NO} "M" "File permissions of ${SQUID_DAEMON_CONFIG} are not restrictive"
+            AddHP 0 2
+          else
+            logtext "Result: file ${SQUID_DAEMON_CONFIG} has proper file permissions"
+            Display --indent 4 --text "- Checking Squid configuration file permissions..." --result OK --color GREEN
+            AddHP 2 2
+        fi
+    fi
+#
+#################################################################################
+#
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then
+        Display --indent 4 --text "- Checking Squid access control..."
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3614
+    # Description : Check Squid authentication
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3614 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid authentication methods"
+    if [ ${SKIPTEST} -eq 0 ]; then
+	logtext "Test: check auth_param option for authentication methods"
+	FIND=`grep "^auth_param" ${SQUID_DAEMON_CONFIG} | awk '{ print $2 }'`
+	if [ "${FIND}" = "" ]; then
+	    logtext "No auth_param option found, proxy access anonymous or based on other methods (like ACLs)"
+	    Display --indent 6 --text "- Checking Squid authentication methods..." --result "NONE" --color YELLOW
+	  else
+	    Display --indent 6 --text "- Checking Squid authentication methods..." --result "FOUND" --color GREEN
+	    for I in ${FIND}; do
+		logtext "Result: found authentication method ${I}"
+		report "squid_auth_method=${I}"
+	    done
+	fi
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3616
+    # Description : Check external Squid authentication
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3616 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check external Squid authentication"
+    if [ ${SKIPTEST} -eq 0 ]; then
+	logtext "Test: check external_acl_type option for external authentication helpers"
+	FIND=`grep "^external_acl_type" ${SQUID_DAEMON_CONFIG}`
+	if [ "${FIND}" = "" ]; then
+	    logtext "No external_acl_type found"
+	    Display --indent 6 --text "- Checking Squid external authentication methods..." --result "NONE" --color YELLOW
+	  else
+	    Display --indent 6 --text "- Checking Squid external authentication methods..." --result "FOUND" --color GREEN
+	    for I in ${FIND}; do
+		logtext "Result: found external authentication method helper"
+		logtext "Output: ${FIND}"
+		#report "squid_external_acl_type=TRUE"
+	    done
+	fi
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3620
+    # Description : Check ACLs
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3620 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid access control lists"
+    if [ ${SKIPTEST} -eq 0 ]; then
+	N=0
+	logtext "Test: checking ACLs"
+	FIND=`grep "^acl " ${SQUID_DAEMON_CONFIG} | sed 's/ /!space!/g'`
+	if [ "${FIND}" = "" ]; then
+	    logtext "Result: No ACLs found"
+	    Display --indent 6 --text "- Checking Access Control Lists..." --result "NONE" --color RED
+	  else
+	    for I in ${FIND}; do
+		N=`expr ${N} + 1`
+		I=`echo ${I} | sed 's/!space!/ /g'`
+		logtext "Found ACL: ${I}"
+		#report "squid_acl=${I}"
+	    done
+	    logtext "Result: Found ${N} ACLs"
+	    Display --indent 6 --text "- Checking Access Control Lists..." --result "${N} ACLs FOUND" --color GREEN
+	fi
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3624 [T]
+    # Description : Check unsecure ports in Safe_ports list
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3624 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid safe ports"
+    if [ ${SKIPTEST} -eq 0 ]; then
+	N=0
+	logtext "Test: checking ACL Safe_ports http_access option"
+	FIND=`grep "^http_access" ${SQUID_DAEMON_CONFIG} | grep "Safe_ports"`
+	if [ "${FIND}" = "" ]; then
+	    logtext "Result: no Safe_ports found"
+	    Display --indent 6 --text "- Checking ACL 'Safe_ports' http_access option..." --result "NOT FOUND" --color YELLOW
+	    ReportSuggestion ${TEST_NO} "Check if Squid has been configured to restrict access to all safe ports"
+	  else
+	    logtext "Result: checking ACL safe ports"
+	    FIND2=`grep "^acl Safe_ports port" ${SQUID_DAEMON_CONFIG} | awk '{ print $4 }'`
+	    if [ "${FIND2}" = "" ]; then
+		Display --indent 6 --text "- Checking ACL 'Safe_ports' ports..." --result "NONE FOUND" --color YELLOW
+		ReportSuggestion ${TEST_NO} "Check if Squid has been configured for which ports it can allow outgoing traffic (Safe_ports)"
+		AddHP 0 1
+	      else
+	        logtext "Result: Safe_ports found"
+		for I in ${FIND}; do
+		    logtext "Found safe port: ${I}"
+		done
+		Display --indent 6 --text "- Checking ACL 'Safe_ports' ports..." --result "FOUND" --color GREEN
+	        AddHP 1 1
+	    fi
+	    #SQUID_DAEMON_UNSAFE_PORTS_LIST
+	    for I in ${SQUID_DAEMON_UNSAFE_PORTS_LIST}; do
+		logtext "Test: Checking port ${I} in Safe_ports list"
+	        FIND2=`grep "^acl Safe_ports port ${I}" ${SQUID_DAEMON_CONFIG}`
+	        if [ "${FIND2}" = "" ]; then
+	            Display --indent 6 --text "- Checking ACL 'Safe_ports' (port ${I})..." --result "NOT FOUND" --color GREEN
+	            AddHP 1 1
+	          else
+	            Display --indent 6 --text "- Checking ACL 'Safe_ports' (port ${I})..." --result "FOUND" --color RED
+	            ReportWarning ${TEST_NO} "H" "Squid configuration possibly allows relaying traffic via configured Safe_port ${I}"
+	            AddHP 0 1
+	        fi
+	    done
+	fi
+    fi
+#
+#################################################################################
+#
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then
+        Display --indent 4 --text "- Checking Squid Denial of Service tuning options..."
+    fi
+#
+#################################################################################
+#
+    # Test        : SQD-3630 [T]
+    # Description : Check reply_body_max_size value
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3630 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid reply_body_max_size option"
+    if [ ${SKIPTEST} -eq 0 ]; then
+        N=0
+        logtext "Test: checking option reply_body_max_size"
+        FIND=`grep "^reply_body_max_size " ${SQUID_DAEMON_CONFIG} | sed 's/ /!space!/g'`
+        if [ "${FIND}" = "" ]; then
+            logtext "Result: option reply_body_max_size not configured"
+            Display --indent 6 --text "- Checking option: reply_body_max_size" --result "NONE" --color RED
+            AddHP 1 2
+            ReportSuggestion ${TEST_NO} "Configure Squid option reply_body_max_size to limit the upper size of requests."
+          else
+            logtext "Result: option reply_body_max_size configured"
+            logtext "Output: ${FIND}"
+            Display --indent 6 --text "- Checking option: reply_body_max_size" --result "FOUND" --color GREEN
+            AddHP 2 2
+        fi
+    fi
+#
+#################################################################################
+#
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then
+        Display --indent 4 --text "- Checking Squid general options..."
+    fi
+#
+#################################################################################
+#
+
+    # Test        : SQD-3680
+    # Description : Check httpd_suppress_version_string
+    if [ ${SQUID_DAEMON_RUNNING} -eq 1 -a ! "${SQUID_DAEMON_CONFIG}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
+    Register --test-no SQD-3680 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check Squid version suppresion"
+    if [ ${SKIPTEST} -eq 0 ]; then
+        FIND=`grep "^httpd_suppress_version_string " ${SQUID_DAEMON_CONFIG} | grep " on"`
+        if [ "${FIND}" = "" ]; then
+            logtext "Result: option httpd_suppress_version_string not configured"
+            Display --indent 6 --text "- Checking option: httpd_supress_version_string" --result "NOT FOUND" --color YELLOW
+            AddHP 1 2
+            ReportSuggestion ${TEST_NO} "Configure Squid option httpd_suppress_version_string (on) to suppress the version."
+          else
+            logtext "Result: option httpd_suppress_version_string configured"
+            logtext "Output: ${FIND}"
+            Display --indent 6 --text "- Checking option: httpd_suppress_version_string" --result "FOUND" --color GREEN
+            AddHP 2 2
+        fi
+    fi
+#
+#################################################################################
+#
+
+
+# Squid
+#Hardening:
+# $1			$3
+# acl			snmp_community
+# acl			maxconn
+# acl			max_user_ip
+#
+# follow_x_forwarded_for
+#Read cache_peer host type(sibling/parent) proxyport icpport options (if set, icp_access should be set as well)
+#Read cache_peer_domain
+#Read cache_peer_access
+#Read icp_access
+#Read icp_port
+#Read htcp_access
+#Read htcp_port
+#Read http_port
+#Read https_port
+#Read cache_dir
+#Read access_log
+#Read coredump_dir
+#Read quick_abort_min / max /pct
+#
+# Memory tuning
+#Read cache_mem
+#Read maximum_object_size_in_memory
+#Read maximum_object_size
+#Read cache_swap_low
+#Read cache_swap_high
+
+# Security
+#cache_effective_user
+# off
+#forwarded_for
+
+#wccp
+#
+#################################################################################
+#
+
+wait_for_keypress
+
+#
+#================================================================================
+# Lynis - Copyright 2007-2014, Michael Boelen - www.rootkit.nl - The Netherlands