mirror of https://github.com/CISOfy/lynis.git
611 lines
29 KiB
Bash
611 lines
29 KiB
Bash
#!/bin/sh
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#################################################################################
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#
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# Lynis
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# ------------------
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#
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# Copyright 2007-2015, Michael Boelen (michael@rootkit.nl), The Netherlands
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# Web site: http://www.rootkit.nl
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#
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# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
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# welcome to redistribute it under the terms of the GNU General Public License.
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# See LICENSE file for usage of this software.
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#
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#################################################################################
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#
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# Name services
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#
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#################################################################################
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#
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InsertSection "Name services"
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#
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#################################################################################
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#
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BIND_RUNNING=0
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BIND_CONFIG_LOCS="/etc /etc/bind /usr/local/etc"
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BIND_CONFIG_LOCATIONS=""
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POWERDNS_RUNNING=0
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POWERDNS_CONFIG_LOCS="/etc/powerdns /usr/local/etc"
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POWERDNS_AUTH_CONFIG_LOCATION=""
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POWERDNS_AUTH_MASTER=0
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POWERDNS_AUTH_SLAVE=0
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YPBIND_RUNNING=0
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#
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#################################################################################
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#
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# Test : NAME-4016
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# Description : Check main domain (domain <domain name> in /etc/resolv.conf)
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Register --test-no NAME-4016 --weight L --network NO --description "Check /etc/resolv.conf default domain"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: check /etc/resolv.conf for default domain"
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if [ -f /etc/resolv.conf ]; then
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logtext "Result: /etc/resolv.conf found"
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FIND=`cat /etc/resolv.conf | grep "^domain" | awk '{ print $2 }'`
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if [ "${FIND}" = "" ]; then
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logtext "Result: no default domain found"
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Display --indent 2 --text "- Checking default DNS search domain" --result NONE --color WHITE
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else
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logtext "Result: found default domain"
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logtext "Output: ${FIND}"
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report "resolv_conf_domain=${FIND}"
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Display --indent 2 --text "- Checking default DNS search domain" --result FOUND --color GREEN
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RESOLV_DOMAINNAME="${FIND}"
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fi
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4018
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# Description : Check search domains in /etc/resolv.conf
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# Notes : Maximum of one search keyword is allowed in /etc/resolv.conf
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Register --test-no NAME-4018 --weight L --network NO --description "Check /etc/resolv.conf search domains"
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if [ ${SKIPTEST} -eq 0 ]; then
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N=0
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logtext "Test: check /etc/resolv.conf for search domains"
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if [ -f /etc/resolv.conf ]; then
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logtext "Result: /etc/resolv.conf found"
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FIND=`cat /etc/resolv.conf | grep "^search" | sed 's/^search //'`
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if [ "${FIND}" = "" ]; then
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logtext "Result: no search domains found, default domain is being used"
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else
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for I in ${FIND}; do
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logtext "Found search domain: ${I}"
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report "resolv_conf_search_domain[]=${I}"
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N=`expr ${N} + 1`
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done
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# Warn if we have more than 6 search domains, which is maximum in most resolvers
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if [ ${N} -gt 6 ]; then
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logtext "Result: Found ${N} search domains"
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Display --indent 2 --text "- Checking search domains" --result WARNING --color YELLOW
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ReportWarning ${TEST_NO} "L" "Found more than 6 search domains, which is usually more than the maximum allowed number in most resolvers"
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else
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logtext "Result: Found ${N} search domains"
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Display --indent 2 --text "- Checking search domains" --result FOUND --color GREEN
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fi
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fi
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else
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logtext "Result: /etc/resolv.conf does not exist, skipping test"
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Display --indent 2 --text "- Checking search domains" --result "NOT FOUND" --color YELLOW
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fi
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# Check amount of search domains (max 1)
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FIND=`cat /etc/resolv.conf | grep "^search" | wc -l | tr -s ' ' | tr -d ' '`
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if [ ! "${FIND}" = "0" -a ! "${FIND}" = "1" ]; then
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logtext "Result: found ${FIND} line(s) with a search statement (expecting less than 2 lines)"
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Display --indent 4 --text "- Checking search domains lines" --result "CONFIG ERROR" --color YELLOW
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ReportWarning ${TEST_NO} "L" "Found more than 1 search lines in /etc/resolv.conf, which is probably a misconfiguration"
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else
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logtext "Result: found ${FIND} line(s) with a search statement (expecting less than 2 lines)"
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4020
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# Description : Check non default resolv.conf options
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Register --test-no NAME-4020 --weight L --network NO --description "Check non default options"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: check /etc/resolv.conf for non default options"
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if [ -f /etc/resolv.conf ]; then
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logtext "Result: /etc/resolv.conf found"
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FIND=`grep "^options" /etc/resolv.conf | awk '{ print $2 }'`
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if [ "${FIND}" = "" ]; then
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logtext "Result: no specific other options configured in /etc/resolv.conf"
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Display --indent 2 --text "- Checking /etc/resolv.conf options" --result "NONE" --color WHITE
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else
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for I in ${FIND}; do
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logtext "Found option: ${I}"
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report "resolv_conf_option[]=${I}"
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#rotate --> add performance tune point
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#timeout <3 --> add performe tune point
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done
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Display --indent 2 --text "- Checking /etc/resolv.conf options" --result "FOUND" --color GREEN
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fi
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else
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logtext "Result: /etc/resolv.conf not found, test skipped"
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Display --indent 2 --text "- Checking /etc/resolv.conf options" --result "NOT FOUND" --color YELLOW
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4024
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# Description : Check Solaris uname -n output
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Register --test-no NAME-4024 --os Solaris --weight L --network NO --description "Solaris uname -n output"
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if [ ${SKIPTEST} -eq 0 ]; then
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FIND=`uname -n`
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logtext "Result: 'uname -n' returned ${FIND}"
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Display --indent 2 --text "- Checking uname -n output" --result DONE --color GREEN
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fi
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#
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#################################################################################
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#
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# Test : NAME-4026
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# Description : Check Solaris /etc/nodename
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# Notes : If a system is standalone, /etc/nodename should contain a system name only, not FQDN
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Register --test-no NAME-4026 --os Solaris --weight L --network NO --description "Check /etc/nodename"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: checking /etc/nodename"
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if [ -f /etc/nodename ]; then
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logtext "Result: file /etc/nodename exists"
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FIND=`cat /etc/nodename`
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logtext "Output: ${FIND}"
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Display --indent 2 --text "- Checking /etc/nodename" --result "DONE" --color GREEN
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else
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logtext "Result: file /etc/nodename could not be found"
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Display --indent 2 --text "- Checking /etc/nodename" --result "NONE FOUND" --color YELLOW
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4028
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# Description : Check DNS domain name
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# To Do : grep ^DOMAINNAME /etc/conf.d/domainname (remove "'s)
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Register --test-no NAME-4028 --weight L --network NO --description "Check domain name"
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if [ ${SKIPTEST} -eq 0 ]; then
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DOMAINNAME=""
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# NIS
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#logtext "Test: Checking file /etc/domainname"
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#if [ -f /etc/domainname ]; then
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# logtext "Result: file /etc/domainname exists"
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# FIND2=`cat /etc/domainname`
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# if [ ! "${FIND}" = "" ]; then
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# logtext "Found domain name: ${FIND}"
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# DOMAINNAME="${FIND}"
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# else
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# logtext "Result: no domain name found in file"
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# fi
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# else
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# logtext "Result: file /etc/domainname does not exist"
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#fi
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logtext "Test: Checking if dnsdomainname command is available"
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if [ ! "${DNSDOMAINNAMEBINARY}" = "" ]; then
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FIND2=`${DNSDOMAINNAMEBINARY} 2> /dev/null`
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if [ ! "${FIND2}" = "" ]; then
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logtext "Result: dnsdomainname command returned a value"
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logtext "Found domain name: ${FIND2}"
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DOMAINNAME="${FIND2}"
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else
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logtext "Result: dnsdomainname command returned no value"
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fi
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else
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logtext "Result: dnsdomainname binary not found, skip specific test"
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fi
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# If files and commands can't be found, use defined value from resolv.conf
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if [ "${DOMAINNAME}" = "" ]; then
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if [ ! "${RESOLV_DOMAINNAME}" = "" ]; then
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logtext "Result: using domain name from /etc/resolv.conf"
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DOMAINNAME=${RESOLV_DOMAINNAME}
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else
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logtext "Result: using domain name from FQDN hostname"
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#DOMAINNAME=${FQDN#${HOSTNAME}.}
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DOMAINNAME=`echo ${FQDN} | cut -d . -f2-`
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fi
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fi
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if [ ! "${DOMAINNAME}" = "" ]; then
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logtext "Result: found domain name"
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report "domainname=${DOMAINNAME}"
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Display --indent 2 --text "- Searching DNS domain name" --result "FOUND" --color GREEN
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Display --indent 6 --text "Domain name: ${DOMAINNAME}"
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else
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Display --indent 2 --text "- Searching DNS domain name" --result "UNKNOWN" --color YELLOW
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ReportSuggestion ${TEST_NO} "Check DNS configuration for the dns domain name"
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4032
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# Description : Check name service caching daemon (NSCD) status
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Register --test-no NAME-4032 --weight L --network NO --description "Check nscd status"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: checking nscd status"
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IsRunning nscd
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if [ ${RUNNING} -eq 1 ]; then
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logtext "Result: nscd is running"
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Display --indent 2 --text "- Checking nscd status" --result RUNNING --color GREEN
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else
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logtext "Result: nscd is not running"
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Display --indent 2 --text "- Checking nscd status" --result "NOT FOUND" --color WHITE
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#YYY show performance suggestion if LDAP is used
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4202
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# Description : Check if BIND is running
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Register --test-no NAME-4202 --weight L --network NO --description "Check BIND status"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: Checking for running BIND instance"
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IsRunning named
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if [ ${RUNNING} -eq 1 ]; then
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logtext "Result: found BIND process"
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Display --indent 2 --text "- Checking BIND status" --result "FOUND" --color GREEN
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BIND_RUNNING=1
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else
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logtext "Result: BIND not running"
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Display --indent 2 --text "- Checking BIND status" --result "NOT FOUND" --color WHITE
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4204
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# Description : Check configuration file of BIND
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if [ ${BIND_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no NAME-4204 --preqs-met ${PREQS_MET} --weight L --network NO --description "Search BIND configuration file"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: Search BIND configuration file"
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#YYY add chrooted environments
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for I in ${BIND_CONFIG_LOCS}; do
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if [ -f ${I}/named.conf ]; then
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BIND_CONFIG_LOCATION="${I}/named.conf"
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logtext "Result: found configuration file (${BIND_CONFIG_LOCATION})"
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fi
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done
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if [ ! "${BIND_CONFIG_LOCATION}" = "" ]; then
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Display --indent 4 --text "- Checking BIND configuration file" --result "FOUND" --color GREEN
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else
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Display --indent 4 --text "- Checking BIND configuration file" --result "NOT FOUND" --color YELLOW
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4206
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# Description : Check BIND configuration file consistency
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if [ ${BIND_RUNNING} -eq 1 -a ! "${BIND_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no NAME-4206 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check BIND configuration consistency"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: searching for named-checkconf binary"
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if [ ! "${NAMEDCHECKCONFBINARY}" = "" ]; then
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logtext "Result: named-checkconf is installed"
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FIND=`${NAMEDCHECKCONFBINARY} ${BIND_CONFIG_LOCATION}; echo $?`
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if [ "${FIND}" = "0" ]; then
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logtext "Result: configuration file ${BIND_CONFIG_LOCATION} seems to be fine"
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Display --indent 4 --text "- Checking BIND configuration consistency" --result "OK" --color GREEN
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else
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logtext "Result: possible errors found in ${BIND_CONFIG_LOCATION}"
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Display --indent 4 --text "- Checking BIND configuration consistency" --result WARNING --color RED
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ReportWarning ${TEST_NO} "Errors discovered in BIND configuration file"
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fi
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else
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logtext "Result: named-checkconf not found, skipping test"
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4208
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# Description : Check DNS server type (master, slave, caching, forwarding)
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#Register --test-no NAME-4050 --weight L --network NO --description "Check nscd status"
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#if [ ${SKIPTEST} -eq 0 ]; then
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#
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#################################################################################
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#
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# Test : NAME-4210
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# Description : Check if we can determine useful information from banner
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if [ ${BIND_RUNNING} -eq 1 -a ! "${BIND_CONFIG_LOCATION}" = "" -a ! "${DIGBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no NAME-4210 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check DNS banner"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: Trying to determine version from banner"
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FIND=`${DIGBINARY} @localhost version.bind chaos txt | grep "^version.bind" | grep TXT | egrep "[0-9].[0-9].[0-9]*"`
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if [ "${FIND}" = "" ]; then
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logtext "Result: no useful information in banner found"
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Display --indent 4 --text "- Checking BIND version in banner" --result "OK" --color GREEN
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AddHP 2 2
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else
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logtext "Result: possible BIND version available in version banner"
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Display --indent 4 --text "- Checking BIND version in banner" --result WARNING --color RED
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ReportWarning ${TEST_NO} "M" "Found BIND version in banner"
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ReportSuggestion ${TEST_NO} "The version in BIND can be masked by defining 'version none' in the configuration file"
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AddHP 0 2
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4212
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# Description : Check version option in BIND configuration
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#if [ ${BIND_RUNNING} -eq 1 -a ! "${BIND_CONFIG_LOCATION}" = "" -a ! "${DIGBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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#Register --test-no NAME-4210 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check DNS banner"
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#
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#################################################################################
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#
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# Test : NAME-4220
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# Description : Check if we can perform a zone transfer of primary domain
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#Register --test-no NAME-4220 --weight L --network NO --description "Check zone transfer"
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#if [ ${SKIPTEST} -eq 0 ]; then
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#
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#################################################################################
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#
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# Test : NAME-4222
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# Description : Check if we can perform a zone transfer of PTR (of primary domain)
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#Register --test-no NAME-4222 --weight L --network NO --description "Check zone transfer"
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#if [ ${SKIPTEST} -eq 0 ]; then
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#
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#################################################################################
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#
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# Test : NAME-4230
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# Description : Check if PowerDNS is running
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Register --test-no NAME-4230 --weight L --network NO --description "Check PowerDNS status"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: Checking for running PowerDNS instance"
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IsRunning pdns_server
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if [ ${RUNNING} -eq 1 ]; then
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logtext "Result: found PowerDNS process"
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Display --indent 2 --text "- Checking PowerDNS status" --result "RUNNING" --color GREEN
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POWERDNS_RUNNING=1
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else
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logtext "Result: PowerDNS not running"
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Display --indent 2 --text "- Checking PowerDNS status" --result "NOT FOUND" --color WHITE
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4232
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# Description : Check PowerDNS configuration file
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if [ ${POWERDNS_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no NAME-4232 --preqs-met ${PREQS_MET} --weight L --network NO --description "Search PowerDNS configuration file"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: Search PowerDNS configuration file"
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#YYY add chrooted environments
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for I in ${POWERDNS_CONFIG_LOCS}; do
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if [ -f ${I}/pdns.conf ]; then
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POWERDNS_AUTH_CONFIG_LOCATION="${I}/pdns.conf"
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logtext "Result: found configuration file (${POWERDNS_AUTH_CONFIG_LOCATION})"
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fi
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done
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if [ ! "${POWERDNS_AUTH_CONFIG_LOCATION}" = "" ]; then
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Display --indent 4 --text "- Checking PowerDNS configuration file" --result "FOUND" --color GREEN
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else
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Display --indent 4 --text "- Checking PowerDNS configuration file" --result "NOT FOUND" --color YELLOW
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fi
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fi
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#
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#################################################################################
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#
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# # Test : NAME-4234
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# # Description : Check PowerDNS configuration file consistency
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# if [ ${POWERDNS_RUNNING} -eq 1 -a ! "${POWERDNS_AUTH_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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# Register --test-no NAME-4234 --weight L --network NO --description "Check PowerDNS configuration consistency"
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# if [ ${SKIPTEST} -eq 0 ]; then
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# fi
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#
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#################################################################################
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#
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# Test : NAME-4236
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# Description : Check PowerDNS server backends
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if [ ${POWERDNS_RUNNING} -eq 1 -a ! "${POWERDNS_AUTH_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
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Register --test-no NAME-4236 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check PowerDNS backends"
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if [ ${SKIPTEST} -eq 0 ]; then
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logtext "Test: Checking for PowerDNS backends"
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FIND=`cat ${POWERDNS_AUTH_CONFIG_LOCATION} | grep "^launch" | awk -F= '{ print $2 }'`
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if [ ! "${FIND}" = "" ]; then
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for I in ${FIND}; do
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logtext "Found backend: ${I}"
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done
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Display --indent 4 --text "- Checking PowerDNS backends" --result "FOUND" --color GREEN
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else
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logtext "Result: no PowerDNS backends found"
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Display --indent 4 --text "- Checking PowerDNS backends" --result "NOT FOUND" --color YELLOW
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fi
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fi
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#
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#################################################################################
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#
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# Test : NAME-4238
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# Description : Check PowerDNS authoritive status
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if [ ${POWERDNS_RUNNING} -eq 1 -a ! "${POWERDNS_AUTH_CONFIG_LOCATION}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
|
|
Register --test-no NAME-4238 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check PowerDNS authoritive status"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
logtext "Test: Checking for PowerDNS master status"
|
|
FIND=`cat ${POWERDNS_AUTH_CONFIG_LOCATION} | grep "^master=yes"`
|
|
if [ ! "${FIND}" = "" ]; then
|
|
logtext "Found master=yes in configuration file"
|
|
Display --indent 4 --text "- PowerDNS authoritive master: YES"
|
|
POWERDNS_AUTH_MASTER=1
|
|
else
|
|
logtext "Result: most likely not master (no master=yes)"
|
|
Display --indent 4 --text "- PowerDNS authoritive master: NO"
|
|
fi
|
|
logtext "Test: Checking for PowerDNS slave status"
|
|
FIND=`cat ${POWERDNS_AUTH_CONFIG_LOCATION} | grep "^slave=yes"`
|
|
if [ ! "${FIND}" = "" ]; then
|
|
logtext "Found slave=yes in configuration file"
|
|
Display --indent 4 --text "- PowerDNS authoritive slave: YES"
|
|
POWERDNS_AUTH_SLAVE=1
|
|
else
|
|
logtext "Result: most likely not slave (no slave=yes)"
|
|
Display --indent 4 --text "- PowerDNS authoritive slave: NO"
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : NAME-4302
|
|
# Description : Check NIS ypbind daemon status
|
|
Register --test-no NAME-4304 --weight L --network NO --description "Check NIS ypbind status"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
logtext "Test: Checking status of ypbind daemon"
|
|
IsRunning ypbind
|
|
if [ ${RUNNING} -eq 1 ]; then
|
|
logtext "Result: ypbind is running"
|
|
Display --indent 2 --text "- Checking ypbind status" --result "FOUND" --color GREEN
|
|
YPBIND_RUNNING=1
|
|
ReportSuggestion "Disable the usage of NIS/NIS+ and use an alternative like LDAP or Kerberos instead"
|
|
else
|
|
logtext "Result: ypbind is not active"
|
|
Display --indent 2 --text "- Checking ypbind status" --result "NOT FOUND" --color WHITE
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : NAME-4306
|
|
# Description : Check NIS domain
|
|
# Notes : FreeBSD: sysctl kern.domainname
|
|
if [ ${YPBIND_RUNNING} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
|
|
Register --test-no NAME-4306 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check NIS domain"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
logtext "Test: Checking `domainname` for NIS domain value"
|
|
FIND=`${DOMAINNAMEBINARY} | grep -v "(none)"`
|
|
if [ ! "${FIND}" = "" ]; then
|
|
logtext "Value: ${FIND}"
|
|
NISDOMAIN="${FIND}"
|
|
else
|
|
logtext "Result: no NIS domain found in command output"
|
|
fi
|
|
# Solaris / Linux style
|
|
logtext "Test: Checking file /etc/defaultdomain"
|
|
if [ -f /etc/defaultdomain ]; then
|
|
logtext "Result: file /etc/defaultdomain exists"
|
|
FIND2=`cat /etc/defaultdomain`
|
|
if [ ! "${FIND2}" = "" ]; then
|
|
logtext "Output: ${FIND2}"
|
|
NISDOMAIN="${FIND2}"
|
|
else
|
|
logtext "Result: no NIS domain found in file"
|
|
fi
|
|
fi
|
|
# Red Hat style
|
|
logtext "Test: checking /etc/sysconfig/network"
|
|
if [ -f /etc/sysconfig/network ]; then
|
|
logtext "Result: file /etc/sysconfig/network exists"
|
|
logtext "Test: checking NISDOMAIN value in file"
|
|
FIND3=`grep "^NISDOMAIN" /etc/sysconfig/network | awk -F= '{ print $2 }' | sed 's/"//g'`
|
|
if [ ! "${FIND3}" = "" ]; then
|
|
logtext "Found NIS domain: ${FIND3}"
|
|
NISDOMAIN="${FIND3}"
|
|
else
|
|
logtext "Result: No NIS domain found in file"
|
|
fi
|
|
else
|
|
logtext "Result: file /etc/sysconfig/network does not exist"
|
|
fi
|
|
|
|
# Check sysctl (e.g. FreeBSD)
|
|
logtext "Test: checking sysctl for kern.domainname"
|
|
FIND=`sysctl -a 2>&1 | grep "^kern.domainname" | awk -F: '{ print $2 }' | sed 's/ //g' | grep -v "^$"`
|
|
if [ ! "${FIND}" = "" ]; then
|
|
logtext "Result: found NIS domain via sysctl"
|
|
NISDOMAIN="${FIND}"
|
|
fi
|
|
# Check if we found any NIS domain
|
|
if [ ! "${NISDOMAIN}" = "" ]; then
|
|
logtext "Found NIS domain: ${NISDOMAIN}"
|
|
report "nisdomain=${NISDOMAIN}"
|
|
Display --indent 4 --text "- Checking NIS domain" --result "FOUND" --color GREEN
|
|
else
|
|
logtext "Result: No NIS domain found"
|
|
Display --indent 4 --text "- Checking NIS domain" --result "UNKNOWN" --color YELLOW
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
if [ -f /etc/hosts ]; then
|
|
Display --indent 2 --text "- Checking /etc/hosts"
|
|
fi
|
|
|
|
# Test : NAME-4402
|
|
# Description : Check /etc/hosts configuration
|
|
Register --test-no NAME-4402 --weight L --network NO --description "Check duplicate line in /etc/hosts"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
logtext "Test: check duplicate line in /etc/hosts"
|
|
if [ -f /etc/hosts ]; then
|
|
sFIND=`cat /etc/hosts | egrep -v '^(#|$)' | uniq -d`
|
|
if [ "${sFIND}" = "" ]; then
|
|
logtext "Result: OK, no duplicate lines found"
|
|
Display --indent 4 --text "- Checking /etc/hosts (duplicates)" --result OK --color GREEN
|
|
else
|
|
logtext "Found duplicate line: ${sFIND}"
|
|
logtext "Result: found duplicate line"
|
|
Display --indent 4 --text "- Checking /etc/hosts (duplicates)" --result SUGGESTION --color YELLOW
|
|
ReportSuggestion ${TEST_NO} "L" "Remove duplicate lines in /etc/hosts"
|
|
fi
|
|
else
|
|
logtext "Result: /etc/hosts not found, test skipped"
|
|
Display --indent 4 --text "Searching duplicate line" --result "SKIPPED" --color YELLOW
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : NAME-4404
|
|
# Description : Check /etc/hosts contains an entry for this server name
|
|
if [ ! "${HOSTNAME}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
|
|
Register --test-no NAME-4404 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check /etc/hosts contains an entry for this server name"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
logtext "Test: Check /etc/hosts contains an entry for this server name"
|
|
if [ -f /etc/hosts ]; then
|
|
sFIND=`cat /etc/hosts | egrep -v '^(#|$|::1|localhost)' | grep ${HOSTNAME}`
|
|
if [ "${sFIND}" != "" ]; then
|
|
logtext "Result: Found entry for ${HOSTNAME} in /etc/hosts"
|
|
Display --indent 4 --text "- Checking /etc/hosts (hostname)" --result OK --color GREEN
|
|
else
|
|
logtext "Result: No entry found for ${HOSTNAME} in /etc/hosts"
|
|
Display --indent 4 --text "- Checking /etc/hosts (hostname)" --result SUGGESTION --color YELLOW
|
|
ReportSuggestion ${TEST_NO} "Add the IP name and FQDN to /etc/hosts for proper name resolving"
|
|
logtext "Risk: No entry for the server name [hostname] in /etc/hosts may cause unexpected performance problems for local connections"
|
|
fi
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
# Test : NAME-4406
|
|
# Description : Check server hostname mapping
|
|
if [ ! "${HOSTNAME}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
|
|
Register --test-no NAME-4406 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check server hostname mapping"
|
|
if [ ${SKIPTEST} -eq 0 ]; then
|
|
logtext "Test: Check server hostname not locally mapped in /etc/hosts"
|
|
sFIND=`cat /etc/hosts | egrep -v '^(#|$)' | egrep '(localhost|::1)' | grep ${HOSTNAME}`
|
|
if [ ! "${sFIND}" = "" ]; then
|
|
logtext "Result: Found this server hostname mapped to a local address"
|
|
Display --indent 4 --text "- Checking /etc/hosts (localhost)" --result SUGGESTION --color YELLOW
|
|
logtext "Information: Linking the hostname to the localhost entry may break some resolving. Split resolving so that localhost resolves back to 127.0.0.1 (and ::1) and the hostname of the machine to the real IP address on the network interface."
|
|
ReportSuggestion ${TEST_NO} "Split resolving between localhost and the hostname of the system"
|
|
else
|
|
logtext "Result: this server hostname is not mapped to a local address"
|
|
Display --indent 4 --text "- Checking /etc/hosts (localhost)" --result OK --color GREEN
|
|
fi
|
|
fi
|
|
#
|
|
#################################################################################
|
|
#
|
|
|
|
wait_for_keypress
|
|
|
|
#
|
|
#================================================================================
|
|
# Lynis - Copyright 2007-2015 Michael Boelen, CISOfy - https://cisofy.com
|