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lynis/include/tests_squid
hlein b595cc0fb5 Various cleanups (#363) 
* Typo fix.

* Style change: always use $(), never ``.

The Lynis code already mostly used $(), but backticks were sprinkled
around.  Converted all of them.

* Lots of minor spelling/typo fixes.

FWIW these were found with:

  find . -type f -print0 | xargs -0 cat | aspell list | sort -u | egrep '^[a-z]+$' | less

And then reviewing the list to pick out things that looked like
misspelled words as opposed to variables, etc., and then manual
inspection of context to determine the intention.
2017-03-06 07:41:21 +00:00

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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2017, CISOfy
#
# Website : https://cisofy.com
# Blog : http://linux-audit.com
# GitHub : https://github.com/CISOfy/lynis
#
# 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 --category security --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 | ${EGREPBINARY} "(squid|squid3) " | ${GREPBINARY} -v "grep")
if [ ! "${FIND}" = "" ]; then
SQUID_DAEMON_RUNNING=1
LogText "Result: Squid daemon is running"
Display --indent 2 --text "- Checking running Squid daemon" --result "${STATUS_FOUND}" --color GREEN
else
LogText "Result: No running Squid daemon found"
Display --indent 2 --text "- Checking running Squid daemon" --result "${STATUS_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 --category security --description "Check Squid daemon file location"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: 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 [ "${SQUID_DAEMON_CONFIG}" = "" ]; then
LogText "Result: No Squid configuration file found"
Display --indent 4 --text "- Searching Squid configuration file" --result "${STATUS_NOT_FOUND}" --color YELLOW
else
LogText "Result: using last found configuration file: ${SQUID_DAEMON_CONFIG}"
Display --indent 4 --text "- Searching Squid configuration" --result "${STATUS_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 --category security --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 | ${AWKBINARY} '{ if ($3=="Version") { print $4 } }')
Display --indent 4 --text "- Checking Squid version" --result "${STATUS_FOUND}" --color GREEN
SQUID_VERSION="${FIND2}"
else
LogText "Result: test skipped for security reasons, setuid/setgid bit set"
Display --indent 4 --text "- Checking Squid version" --result "${STATUS_SKIPPED}" --color RED
fi
else
LogText "Result: no Squid binary found"
fi
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 --category security --description "Check Squid version"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: Checking all specific defined options in ${SQUID_DAEMON_CONFIG}"
FIND=$(${GREPBINARY} -v "^#" ${SQUID_DAEMON_CONFIG} | ${GREPBINARY} -v "^$" | ${AWKBINARY} '{gsub("\t"," ");print}' | ${SEDBINARY} 's/ /!space!/g')
for I in ${FIND}; do
I=$(echo ${I} | ${SEDBINARY} 's/!space!/ /g')
LogText "Found Squid option: ${I}"
Report "squid_option=${I}"
done
Display --indent 4 --text "- Checking defined Squid options" --result "${STATUS_DONE}" --color GREEN
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 --category security --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 ${SQUID_DAEMON_CONFIG} is world readable, writable or executable and could leak information or passwords"
Display --indent 4 --text "- Checking Squid configuration file permissions" --result "${STATUS_WARNING}" --color RED
ReportSuggestion ${TEST_NO} "Check file permissions of ${SQUID_DAEMON_CONFIG} to limit access"
ReportWarning ${TEST_NO} "File permissions of ${SQUID_DAEMON_CONFIG} are not restrictive"
AddHP 0 2
else
LogText "Result: file ${SQUID_DAEMON_CONFIG} has proper file permissions"
Display --indent 4 --text "- Checking Squid configuration file permissions" --result "${STATUS_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 --category security --description "Check Squid authentication methods"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check auth_param option for authentication methods"
FIND=$(${GREPBINARY} "^auth_param" ${SQUID_DAEMON_CONFIG} | ${AWKBINARY} '{ 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 "${STATUS_NONE}" --color YELLOW
else
Display --indent 6 --text "- Checking Squid authentication methods" --result "${STATUS_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 --category security --description "Check external Squid authentication"
if [ ${SKIPTEST} -eq 0 ]; then
LogText "Test: check external_acl_type option for external authentication helpers"
FIND=$(${GREPBINARY} "^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 "${STATUS_NONE}" --color YELLOW
else
Display --indent 6 --text "- Checking Squid external authentication methods" --result "${STATUS_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 --category security --description "Check Squid access control lists"
if [ ${SKIPTEST} -eq 0 ]; then
N=0
LogText "Test: checking ACLs"
FIND=$(${GREPBINARY} "^acl " ${SQUID_DAEMON_CONFIG} | ${SEDBINARY} 's/ /!space!/g')
if [ "${FIND}" = "" ]; then
LogText "Result: No ACLs found"
Display --indent 6 --text "- Checking Access Control Lists" --result "${STATUS_NONE}" --color RED
else
for I in ${FIND}; do
N=$((N + 1))
I=$(echo ${I} | ${SEDBINARY} '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 --category security --description "Check Squid safe ports"
if [ ${SKIPTEST} -eq 0 ]; then
N=0
LogText "Test: checking ACL Safe_ports http_access option"
FIND=$(${GREPBINARY} "^http_access" ${SQUID_DAEMON_CONFIG} | ${GREPBINARY} "Safe_ports")
if [ "${FIND}" = "" ]; then
LogText "Result: no Safe_ports found"
Display --indent 6 --text "- Checking ACL 'Safe_ports' http_access option" --result "${STATUS_NOT_FOUND}" --color YELLOW
ReportSuggestion ${TEST_NO} "Check if Squid has been configured to restrict access to all safe ports"
else
LogText "Result: checking ACL safe ports"
FIND2=$(${GREPBINARY} "^acl Safe_ports port" ${SQUID_DAEMON_CONFIG} | ${AWKBINARY} '{ 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: ${I}"
done
Display --indent 6 --text "- Checking ACL 'Safe_ports' ports" --result "${STATUS_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 ${I} in Safe_ports list"
FIND2=$(${GREPBINARY} -w "^acl Safe_ports port ${I}" ${SQUID_DAEMON_CONFIG})
if [ "${FIND2}" = "" ]; then
Display --indent 6 --text "- Checking ACL 'Safe_ports' (port ${I})" --result "${STATUS_NOT_FOUND}" --color GREEN
AddHP 1 1
else
Display --indent 6 --text "- Checking ACL 'Safe_ports' (port ${I})" --result "${STATUS_FOUND}" --color RED
ReportWarning ${TEST_NO} "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 --category security --description "Check Squid reply_body_max_size option"
if [ ${SKIPTEST} -eq 0 ]; then
N=0
LogText "Test: checking option reply_body_max_size"
FIND=$(${GREPBINARY} "^reply_body_max_size " ${SQUID_DAEMON_CONFIG} | ${SEDBINARY} 's/ /!space!/g')
if [ "${FIND}" = "" ]; then
LogText "Result: option reply_body_max_size not configured"
Display --indent 6 --text "- Checking option: reply_body_max_size" --result "${STATUS_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: ${FIND}"
Display --indent 6 --text "- Checking option: reply_body_max_size" --result "${STATUS_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 --category security --description "Check Squid version suppresion"
if [ ${SKIPTEST} -eq 0 ]; then
FIND=$(${GREPBINARY} "^httpd_suppress_version_string " ${SQUID_DAEMON_CONFIG} | ${GREPBINARY} " on")
if [ "${FIND}" = "" ]; then
LogText "Result: option httpd_suppress_version_string not configured"
Display --indent 6 --text "- Checking option: httpd_suppress_version_string" --result "${STATUS_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: ${FIND}"
Display --indent 6 --text "- Checking option: httpd_suppress_version_string" --result "${STATUS_FOUND}" --color GREEN
AddHP 2 2
fi
fi
#
#################################################################################
#
WaitForKeyPress
#
#================================================================================
# Lynis - Copyright 2007-2017 Michael Boelen, CISOfy - https://cisofy.com
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