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#!/bin/sh
#################################################################################
#
# Lynis
# ------------------
#
# Copyright 2007-2015, Michael Boelen, CISOfy (michael.boelen@cisofy.com)
# Web site: https://cisofy.com
#
# 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.
#
#################################################################################
#
# User, Group and authentication tests
#
#################################################################################
#
LDAP_AUTH_ENABLED=0
LDAP_PAM_ENABLED=0
LDAP_CONF_LOCATIONS="/etc/ldap.conf /etc/ldap/ldap.conf /etc/openldap/ldap.conf /usr/local/etc/ldap.conf /usr/local/etc/openldap/ldap.conf"
PAM_FILE_LOCATIONS="/lib/i386-linux-gnu/security /lib/security /lib/x86_64-linux-gnu/security /lib64/security /usr/lib/security"
SUDOERS_LOCATIONS="/etc/sudoers /usr/local/etc/sudoers /usr/pkg/etc/sudoers"
SUDOERS_FILE=""
#
#################################################################################
#
InsertSection "Users, Groups and Authentication"
# Test : AUTH-9204
# Description : Check users with UID zero (0)
# Notes : Ignores :0: in file if match is in NIS related line
Register --test-no AUTH-9204 --weight L --network NO --description "Check users with an UID of zero"
if [ ${SKIPTEST} -eq 0 ]; then
# Search accounts with UID 0
logtext "Test: Searching accounts with UID 0"
FIND=`grep ':0:' /etc/passwd | egrep -v '^#|^root:|^(\+:\*)?:0:0:::' | cut -d ":" -f1,3 | grep ':0'`
if [ ! "${FIND}" = "" ]; then
Display --indent 2 --text "- Search administrator accounts" --result WARNING --color RED
logtext "Result: Found more than one administrator accounts"
ReportWarning "${TEST_NO}" "H" "Multiple users with UID 0 found in passwd file"
for I in ${FIND}; do
logtext "Administrator account: ${I}"
if [ "${I}" = "toor" ]; then
logtext "BSD note: default there is a user 'toor' installed. This account is considered useless unless it"
logtext "is assigned a password and used for daily operations or emergencies. ie: bad shell for root user."
ReportSuggestion ${TEST_NO} "Use vipw to delete the 'toor' user if not used."
fi
done
else
Display --indent 2 --text "- Search administrator accounts" --result OK --color GREEN
logtext "Result: No accounts found with UID 0 other than root."
fi
fi
#
#################################################################################
#
# Test : AUTH-9208
# Description : Check non-unique accounts
Register --test-no AUTH-9208 --weight L --network NO --description "Check non-unique accounts in passwd file"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking for non-unique accounts"
if [ "${OS}" = "DragonFly" -o "${OS}" = "FreeBSD" -o "${OS}" = "NetBSD" ]; then
PASSWD_FILE="/etc/master.passwd"
else
PASSWD_FILE="/etc/passwd"
fi
# Check password file
if [ -f ${PASSWD_FILE} ]; then
FIND=`cat ${PASSWD_FILE} | grep -v '^#' | cut -d ':' -f3 | uniq -d`
if [ "${FIND}" = "" ]; then
Display --indent 2 --text "- Checking for non-unique UIDs" --result OK --color GREEN
logtext "Result: all accounts found in ${PASSWD_FILE} are unique"
else
Display --indent 2 --text "- Checking for non-unique UIDs" --result WARNING --color RED
logtext "Result: found multiple accounts with same UID"
logtext "Output (non-unique UIDs): ${FIND}"
ReportWarning ${TEST_NO} "Multiple accounts found with same UID"
fi
else
Display --indent 2 --text "- Checking UIDs" --result SKIPPED --color WHITE
logtext "Result: test skipped, ${PASSWD_FILE} file not available"
fi
logtext "Remarks: Non unique UIDs can riskful for the system or part of a configuration mistake"
fi
#
#################################################################################
#
# Test : AUTH-9212
# Description : Test group file with chkgrp tool (ie FreeBSD)
if [ -f /usr/sbin/chkgrp ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9212 --preqs-met ${PREQS_MET} --weight L --network NO --description "Test group file"
if [ ${SKIPTEST} -eq 0 ]; then
Display --indent 2 --text "- Checking chkgrp tool" --result FOUND --color GREEN
logtext "Result: /usr/sbin/chkgrp binary found. Using this to perform next test(s)."
logtext "Test: Testing consistency of /etc/group file"
FIND=`/usr/sbin/chkgrp | grep -v 'is fine'`
if [ "${FIND}" = "" ]; then
Display --indent 4 --text "- Checking consistency of /etc/group file" --result OK --color GREEN
logtext "Result: chkgrp test performed, Group file seems to be ok."
else
Display --indent 4 --text "- Checking consistency of /etc/group file" --result WARNING --color RED
logtext "Result: chkgrp found some errors. Run the tool manually to see details."
logtext "chkgrp output: ${FIND}"
ReportWarning ${TEST_NO} "M" "chkgrp reported inconsistencies in /etc/group file"
fi
fi
#
#################################################################################
#
# Test : AUTH-9216
# Description : Check /etc/group and shadow group files
if [ ! "${GRPCKBINARY}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9216 --preqs-met ${PREQS_MET} --weight L --network NO --root-only YES --description "Check group and shadow group files"
if [ ${SKIPTEST} -eq 0 ]; then
# Test : run grpck to test group files (most likely /etc/group and shadow group files)
# Expected result : 0 (exit code)
logtext "Test: Checking for grpck binary"
if [ "${OS}" = "Linux" ]; then
# Read only mode
FIND=`${GRPCKBINARY} -r 2> /dev/null ; echo $?`
elif [ "${OS}" = "AIX" ]; then
FIND=`${GRPCKBINARY} -n ALL 2> /dev/null ; echo $?`
else
FIND=`${GRPCKBINARY} 2> /dev/null ; echo $?`
fi
# Overrule for SuSE
if [ "${LINUX_VERSION}" = "SuSE" ]; then
FIND=`${GRPCKBINARY} -q -r > /dev/null ; echo $?`
fi
# Check exit-code
if [ "${FIND}" = "0" ]; then
Display --indent 2 --text "- Checking consistency of group files (grpck)" --result OK --color GREEN
logtext "Result: grpck binary didn't find any errors in the group files"
else
Display --indent 2 --text "- Checking consistency of group files (grpck)" --result WARNING --color RED
ReportWarning ${TEST_NO} "M" "grpck binary found errors in one or more group files"
ReportSuggestion ${TEST_NO} "Run grpck manually and check your group files"
fi
fi
#
#################################################################################
#
# Test : AUTH-9218
# Description : Check login shells for passwordless accounts
# Notes : Results should be checked
Register --test-no AUTH-9218 --os FreeBSD --weight L --network NO --description "Check harmful login shells"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
logtext "Test: Checking login shells"
if [ -f /etc/master.passwd ]; then
# Check for all shells, except: (/usr)/sbin/nologin /nonexistent
FIND=`cat /etc/master.passwd | grep "[a-z]:\*:" | egrep -v '^#|/sbin/nologin|/usr/sbin/nologin|/nonexistent' | sed 's/ /!space!/g'`
if [ "${FIND}" = "" ]; then
Display --indent 2 --text "- Checking login shells" --result OK --color GREEN
else
Display --indent 2 --text "- Checking login shells" --result WARNING --color RED
for I in ${FIND}; do
I=`echo ${I} | sed 's/!space!/ /g'`
J=`echo ${I} | awk -F: '{ print $10 }'`
logtext "Output: ${I}"
if [ "${J}" = "" ]; then
logtext "Result: found no shell on line"
else
logtext "Result: found possible harmful shell ${J}"
if [ -f ${J} ]; then
logtext "Result: shell ${J} does exist"
FOUND=1
else
logtext "Result: shell ${J} does not exist"
ReportSuggestion ${TEST_NO} "Determine if account is needed, as shell ${J} does not exist"
fi
fi
done
if [ ${FOUND} -eq 1 ]; then
ReportWarning ${TEST_NO} "H" "Possible harmful shell found (for passwordless account!)"
fi
fi
else
Display --indent 2 --text "- Checking login shells" --result SKIPPED --color WHITE
logtext "Result: No /etc/master.passwd file found"
fi
fi
#
#################################################################################
#
# Test : AUTH-9222
# Description : Check for non unique groups
Register --test-no AUTH-9222 --weight L --network NO --description "Check for non unique groups"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking for non unique group ID's in /etc/group"
FIND=`cat /etc/group | grep -v '^#' | grep -v '^$' | awk -F: '{ print $3 }' | sort | uniq -d`
if [ "${FIND}" = "" ]; then
Display --indent 2 --text "- Checking non unique group ID's" --result OK --color GREEN
logtext "Result: All group ID's are unique"
else
Display --indent 2 --text "- Checking non unique group ID's" --result WARNING --color RED
logtext "Result: Found the same group ID multiple times"
logtext "Output: ${FIND}"
ReportWarning ${TEST_NO} "H" "Found multiple groups with same group ID"
#ReportSuggestion ${TEST_NO} "Check your /etc/group file and correct inconsistencies"
fi
fi
#
#################################################################################
#
# Test : AUTH-9226
# Description : Check non unique group names
if [ -f /etc/group ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9226 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check non unique group names"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking for non unique group names in /etc/group"
FIND=`cat /etc/group | grep -v '^#' | grep -v '^$' | awk -F: '{ print $1 }' | sort | uniq -d`
if [ "${FIND}" = "" ]; then
Display --indent 2 --text "- Checking non unique group names" --result OK --color GREEN
logtext "Result: All group names are unique"
else
Display --indent 2 --text "- Checking non unique group names" --result WARNING --color WARNING
logtext "Result: Found the same group name multiple times"
logtext "Output: ${FIND}"
ReportWarning ${TEST_NO} "M" "Found inconsistencies in group file (multiple occurences of a single group)"
ReportSuggestion ${TEST_NO} "Check your /etc/group file and correct inconsistencies"
fi
fi
#
#################################################################################
#
# Test : AUTH-9228
# Description : Check Linux password file consistency
if [ -x /usr/sbin/pwck ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9228 --os Linux --preqs-met ${PREQS_MET} --weight L --network NO --description "Check password file consistency"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking password file consistency (pwck)"
FIND=`/usr/sbin/pwck -q -r 2> /dev/null; echo $?`
if [ "${FIND}" = "0" ]; then
Display --indent 2 --text "- Checking password file consistency" --result OK --color GREEN
logtext "Result: pwck check didn't find any problems"
else
Display --indent 2 --text "- Checking password file consistency" --result WARNING --color RED
logtext "Result: pwck found one or more errors/warnings in the password file."
ReportWarning ${TEST_NO} "M" "pwck found one or more errors/warnings in the password file"
ReportSuggestion ${TEST_NO} "Run pwck manually and correct found issues."
fi
fi
#
#################################################################################
#
# Test : AUTH-9230
# Description : Check Solaris password file consistency
if [ -x /usr/sbin/pwck ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9230 --os Solaris --preqs-met ${PREQS_MET} --weight L --network NO --description "Check password file consistency"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking password file consistency (pwck)"
FIND=`/usr/sbin/pwck 2> /dev/null; echo $?`
if [ "${FIND}" = "0" ]; then
Display --indent 2 --text "- Checking password file consistency" --result OK --color GREEN
logtext "Result: pwck finished didn't find problems"
else
Display --indent 2 --text "- Checking password file consistency" --result WARNING --color RED
logtext "Result: pwck found one or more errors/warnings in the password file."
ReportWarning ${TEST_NO} "M" "pwck found one or more errors/warnings in the password file"
ReportSuggestion ${TEST_NO} "Run pwck manually and correct found issues."
fi
fi
#
#################################################################################
#
# Test : AUTH-9234
# Description : Query user accounts
# Notes : HPUX > 100
# MacOS: need to be improved (just reading passwd file is not enough)
# OpenBSD/NetBSD: unknown
# Arch Linux / CentOS / Ubuntu: 1000+
Register --test-no AUTH-9234 --os Linux --weight L --network NO --description "Query user accounts"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Read system users (including root user) from /etc/passwd"
FIND=""
case ${OS} in
"FreeBSD")
logtext "FreeBSD real users output (ID = 0, or 1000+, but not 65534):"
FIND=`awk -F: '($3 >= 1000) && ($3 != 65534) || ($3 == 0) { print $1","$3 }' /etc/passwd`
;;
"Linux")
logtext "Linux real users output (ID = 0, or 500+, but not 65534):"
FIND=`awk -F: '($3 >= 1000) && ($3 != 65534) || ($3 == 0) { print $1","$3 }' /etc/passwd`
;;
"Solaris")
logtext "Solaris real users output (ID =0, or 100+, but not 60001/65534):"
FIND=`awk -F: '($3 >= 100 && $3 != 60001 && $3 != 65534) || ($3 == 0) { print $1","$3 }' /etc/passwd`
;;
*)
# Want to help improving Lynis? Determine what user IDs belong to normal user accounts
ReportException "${TEST_NO}:1" "Can not determine user accounts"
;;
esac
# Check if we got any output
if [ "${FIND}" = "" ]; then
Display --indent 4 --text "Result: No users found/unknown result"
logtext "Result: Querying of system users skipped"
Display --indent 2 --text "- Query system users (non daemons)" --result UNKNOWN --color YELLOW
else
Display --indent 2 --text "- Query system users (non daemons)" --result DONE --color GREEN
for I in ${FIND}; do
logtext "Real user: ${I}"
report "real_user[]=${I}"
done
fi
fi
#
#################################################################################
#
# Test : AUTH-9240
# Description : Query NIS+ authentication support
Register --test-no AUTH-9240 --weight L --network NO --description "Query NIS+ authentication support"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /etc/nsswitch.conf ]; then
FIND=`egrep "^passwd" /etc/nsswitch.conf | egrep "compat|nisplus"`
if [ "${FIND}" = "" ]; then
logtext "Result: NIS+ authentication not enabled"
Display --indent 2 --text "- Checking NIS+ authentication support" --result "NOT ENABLED" --color WHITE
else
FIND2=`egrep "^passwd_compat" /etc/nsswitch.conf | grep "nisplus"`
FIND3=`egrep "^passwd" /etc/nsswitch.conf | grep "nisplus"`
if [ ! "${FIND2}" = "" -o ! "${FIND3}" = "" ]; then
logtext "Result: NIS+ authentication enabled"
Display --indent 2 --text "- Checking NIS+ authentication support" --result "ENABLED" --color GREEN
else
logtext "Result: NIS+ authentication not enabled"
Display --indent 2 --text "- Checking NIS+ authentication support" --result "NOT ENABLED" --color WHITE
fi
fi
else
logtext "Result: /etc/nsswitch.conf not found"
fi
fi
#
#################################################################################
#
# Test : AUTH-9242
# Description : Query NIS authentication support
Register --test-no AUTH-9242 --weight L --network NO --description "Query NIS authentication support"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /etc/nsswitch.conf ]; then
FIND=`egrep "^passwd" /etc/nsswitch.conf | egrep "compat|nis" | grep -v "nisplus"`
if [ "${FIND}" = "" ]; then
logtext "Result: NIS authentication not enabled"
Display --indent 2 --text "- Checking NIS authentication support" --result "NOT ENABLED" --color WHITE
else
FIND2=`egrep "^passwd_compat" /etc/nsswitch.conf | grep "nis" | grep -v "nisplus"`
FIND3=`egrep "^passwd" /etc/nsswitch.conf | grep "nis" | grep -v "nisplus"`
if [ ! "${FIND2}" = "" -o ! "${FIND3}" = "" ]; then
logtext "Result: NIS authentication enabled"
Display --indent 2 --text "- Checking NIS authentication support" --result "ENABLED" --color GREEN
else
logtext "Result: NIS authentication not enabled"
Display --indent 2 --text "- Checking NIS authentication support" --result "NOT ENABLED" --color WHITE
fi
fi
else
logtext "Result: /etc/nsswitch.conf not found"
fi
fi
#
#################################################################################
#
# Test : AUTH-9250
# Description : Check for sudoers file
Register --test-no AUTH-9250 --weight L --network NO --description "Checking sudoers file"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
for I in ${SUDOERS_LOCATIONS}; do
logtext "Test: checking presence ${I}"
if [ -f ${I} ]; then
FOUND=1
SUDOERS_FILE="${I}"
logtext "Result: found file (${SUDOERS_FILE})"
else
logtext "Result: file ${I} not found"
fi
done
if [ ${FOUND} -eq 1 ]; then
logtext "Result: sudoers file found (${SUDOERS_FILE})"
Display --indent 2 --text "- Checking sudoers file" --result FOUND --color GREEN
else
logtext "Result: sudoers file NOT found"
Display --indent 2 --text "- Checking sudoers file" --result "NOT FOUND" --color YELLOW
fi
fi
#
#################################################################################
#
# Test : AUTH-9252
# Description : Check for sudoers file permissions
if [ ! "${SUDOERS_FILE}" = "" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9252 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check sudoers file"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: checking sudoers file (${SUDOERS_FILE}) permissions"
FIND=`ls -l ${SUDOERS_FILE} | cut -c 2-10`
logtext "Result: Found file permissions: ${FIND}"
if [ "${FIND}" = "rw-------" -o "${FIND}" = "rw-rw----" -o "${FIND}" = "r--r-----" ]; then
logtext "Result: file ${SUDOERS_FILE} has correct permissions"
Display --indent 4 --text "- Check sudoers file permissions" --result OK --color GREEN
else
logtext "Result: file has possibly unsafe file permissions"
Display --indent 4 --text "- Check sudoers file permissions" --result WARNING --color RED
fi
fi
#
#################################################################################
#
# Test : AUTH-9254
# Description : Solaris test to check passwordless accounts
Register --test-no AUTH-9254 --os Solaris --weight L --network NO --description "Solaris passwordless accounts"
if [ ${SKIPTEST} -eq 0 ]; then
FIND=`logins -p | awk '{ print $1 }'`
if [ "${FIND}" = "" ]; then
logtext "Result: no passwordless accounts found"
Display --indent 2 --text "- Checking passwordless accounts on Solaris" --result OK --color GREEN
else
for I in ${FIND}; do
ReportWarning ${TEST_NO} "H" "Found passwordless account (${I})"
done
Display --indent 2 --text "- Checking passwordless accounts on Solaris" --result WARNING --color RED
fi
fi
#
#################################################################################
#
# Test : AUTH-9262
# Description : Search for PAM password strength testing libraries
Register --test-no AUTH-9262 --weight L --network NO --description "Checking presence password strength testing tools (PAM)"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
FOUND_CRACKLIB=0
FOUND_PASSWDQC=0
# Cracklib
logtext "Searching cracklib PAM module"
for I in ${PAM_FILE_LOCATIONS}; do
if [ -f ${I}/pam_cracklib.so ]; then
FOUND_CRACKLIB=1
logtext "Result: found pam_cracklib.so (crack library PAM) in ${I}"
fi
done
if [ ${FOUND_CRACKLIB} -eq 1 ]; then
logtext "Result: pam_cracklib.so found"
report "pam_cracklib=1"
AddHP 3 3
FOUND=1
else
logtext "Result: pam_cracklib.so NOT found (crack library PAM)"
AddHP 1 3
fi
# Passwd quality control
logtext "Searching passwdqc PAM module"
for I in ${PAM_FILE_LOCATIONS}; do
if [ -f ${I}/pam_passwdqc.so ]; then
FOUND_PASSWDQC=1
logtext "Result: found pam_passwdqc.so (passwd quality control PAM) in ${I}"
fi
done
if [ ${FOUND_PASSWDQC} -eq 1 ]; then
logtext "Result: pam_passwdqc.so found"
report "pam_passwdqc=1"
AddHP 3 3
FOUND=1
else
logtext "Result: pam_passwdqc.so NOT found (passwd quality control PAM)"
AddHP 1 3
fi
if [ ${FOUND} -eq 0 ]; then
Display --indent 2 --text "- Checking PAM password strength tools" --result "SUGGESTION" --color YELLOW
logtext "Result: no PAM modules for password strength testing found"
ReportSuggestion ${TEST_NO} "Install a PAM module for password strength testing like pam_cracklib or pam_passwdqc"
else
Display --indent 2 --text "- Checking PAM password strength tools" --result OK --color GREEN
logtext "Result: found at least one PAM module for password strength testing"
fi
fi
#
#################################################################################
#
# Test : AUTH-9264
# Description : Scan /etc/pam.conf file
Register --test-no AUTH-9264 --weight L --network NO --description "Checking presence pam.conf"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking file /etc/pam.conf"
if [ -f /etc/pam.conf ]; then
logtext "Result: file /etc/pam.conf exists"
Display --indent 2 --text "- Checking PAM configuration files (pam.conf)" --result FOUND --color GREEN
logtext "Test: searching PAM configuration files"
FIND=`cat /etc/pam.conf | grep -v "^#" | grep -v "^$" | sed 's/[[:space:]]/ /g' | sed 's/ / /g' | sed 's/ /:space:/g'`
if [ "${FIND}" = "" ]; then
logtext "Result: File has no configuration options defined (empty, or only filled with comments and empty lines)"
else
logtext "Result: found one or more configuration lines"
for I in ${FIND}; do
I=`echo ${I} | sed 's/:space:/ /g'`
logtext "Found line: ${I}"
done
fi
else
logtext "Result: file /etc/pam.conf could not be found"
Display --indent 2 --text "- Checking PAM configuration file (pam.conf)" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : AUTH-9266
# Description : Searching available PAM configurations (/etc/pam.d)
Register --test-no AUTH-9266 --weight L --network NO --description "Checking presence pam.d files"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking directory /etc/pam.d"
if [ -d /etc/pam.d ]; then
logtext "Result: directory /etc/pam.d exists"
Display --indent 2 --text "- Checking PAM configuration files (pam.d)" --result FOUND --color GREEN
logtext "Test: searching PAM configuration files"
FIND=`find /etc/pam.d -type f -print | sort`
for I in ${FIND}; do
logtext "Found file: ${I}"
done
else
logtext "Result: directory /etc/pam.d could not be found"
Display --indent 2 --text "- Checking PAM configuration files (pam.d)" --result "NOT FOUND" --color WHITE
fi
fi
#
#################################################################################
#
# Test : AUTH-9268
# Description : Searching available PAM files
# Notes : PAM is used on AIX, Linux, HPUX, Solaris
if [ ${OS} = "AIX" -o ${OS} = "Linux" -o ${OS} = "HPUX" -o ${OS} = "Solaris" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9268 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking presence pam.d files"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
logtext "Test: Searching pam modules"
for I in ${PAM_FILE_LOCATIONS}; do
logtext "Test: Checking ${I}"
if [ -d ${I} -a ! -L ${I} ]; then
logtext "Result: directory ${I} exists"
FIND=`find ${I} -type f -name "*.so" -print | sort`
if [ ! "${FIND}" = "" ]; then FOUND=1; fi
for I in ${FIND}; do
logtext "Found file: ${I}"
report "pam_module[]=${I}"
done
else
logtext "Result: directory ${I} could not be found or is a symlink to another directory"
fi
done
# Check if we found at least one module
if [ ${FOUND} -eq 0 ]; then
Display --indent 2 --text "- Checking PAM modules" --result "NOT FOUND" --color WHITE
logtext "Result: no PAM modules found"
else
Display --indent 2 --text "- Checking PAM modules" --result FOUND --color GREEN
fi
fi
#
#################################################################################
#
# Test : AUTH-9278
# Description : Search LDAP support in PAM files
Register --test-no AUTH-9278 --weight L --network NO --description "Checking LDAP pam status"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: checking presence /etc/pam.d/common-auth"
if [ -f /etc/pam.d/common-auth ]; then
logtext "Result: file /etc/pam.d/common-auth exists"
logtext "Test: checking presence LDAP module"
FIND=`cat /etc/pam.d/common-auth | grep "^auth" | grep "ldap"`
if [ ! "${FIND}" = "" ]; then
logtext "Result: LDAP module present"
logtext "Output: ${FIND}"
Display --indent 2 --text "- Checking LDAP module in PAM" --result FOUND --color GREEN
LDAP_AUTH_ENABLED=1
LDAP_PAM_ENABLED=1
else
logtext "Result: LDAP module not found"
Display --indent 2 --text "- Checking LDAP module in PAM" --result "NOT FOUND" --color WHITE
fi
else
logtext "Result: file /etc/pam.d/common-auth not found, skipping test"
fi
fi
#
#################################################################################
#
# Test : AUTH-9282 and AUTH-9283
# Note : Every Linux based operating system seem to have different passwd
# options, so we have to check the version first.
if [ "${OS}" = "Linux" ]; then
if [ ${OS_REDHAT_OR_CLONE} -eq 0 ]; then
case ${LINUX_VERSION} in
"SuSE")
PREQS_MET="YES"
FIND=`passwd -a -S 2> /dev/null | awk '{ if ($2=="P" && $5=="99999") print $1 }'`
FIND2=`passwd -a -S 2> /dev/null | awk '{ if ($2=="NP") print $1 }'`
;;
*)
PREQS_MET="YES"
FIND=`passwd --all --status 2> /dev/null | awk '{ if ($2=="P" && $5=="99999") print $1 }'`
FIND2=`passwd --all --status 2> /dev/null | awk '{ if ($2=="NP") print $1 }'`
;;
esac
else
logtext "Result: skipping test for this Linux version"
ReportManual "AUTH-9282:01"
PREQS_MET="NO"
FIND=""
FIND2=""
fi
else
PREQS_MET="NO"
fi
# Test : AUTH-9282
# Description : Search password protected accounts without expire (Linux)
Register --test-no AUTH-9282 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking password protected account without expire date"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking Linux version and password expire date status"
if [ "${FIND}" = "" ]; then
logtext "Result: all accounts seem to have an expire date"
Display --indent 2 --text "- Checking accounts without expire date" --result OK --color GREEN
else
logtext "Result: found one or more accounts with expire date set"
for I in ${FIND}; do
logtext "Account without expire date: ${I}"
done
Display --indent 2 --text "- Checking accounts without expire date" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "When possible set expire dates for all password protected accounts"
fi
fi
# Test : AUTH-9283
# Description : Search passwordless accounts
Register --test-no AUTH-9283 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking accounts without password"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking passwordless accounts"
if [ "${FIND2}" = "" ]; then
logtext "Result: all accounts seem to have a password"
Display --indent 2 --text "- Checking accounts without password" --result OK --color GREEN
else
logtext "Result: found one or more accounts without password"
for I in ${FIND2}; do
logtext "Account without password: ${I}"
report "account_without_password=${I}"
done
Display --indent 2 --text "- Checking accounts without password" --result WARNING --color RED
ReportWarning ${TEST_NO} "Found accounts without password"
fi
fi
#
#################################################################################
#
# Test : AUTH-9286
# Description : Check user password aging
if [ -f /etc/login.defs ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9286 --preqs-met ${PREQS_MET} --weight L --network NO --description "Checking user password aging"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: Checking PASS_MAX_DAYS option in /etc/login.defs "
FIND=`grep "^PASS_MAX_DAYS" /etc/login.defs | awk '{ if ($1=="PASS_MAX_DAYS") { print $2 } }'`
if [ "${FIND}" = "" -o "${FIND}" = "99999" ]; then
logtext "Result: password aging limits are not configured"
Display --indent 2 --text "- Checking user password aging" --result DISABLED --color YELLOW
ReportSuggestion ${TEST_NO} "Configure password aging limits to enforce password changing on a regular base"
AddHP 0 1
else
logtext "Result: accounts with password aging set are checked against PASS_MAX_DAYS"
logtext "Result: value of PASS_MAX_DAYS is ${FIND}"
Display --indent 2 --text "- Checking user password aging" --result OK --color GREEN
AddHP 3 3
fi
fi
#
#################################################################################
#
# Test : AUTH-9304
# Description : Check if single user mode login is properly configured in Solaris
# Notes : sulogin should be called from svm script (Solaris <10) in /etc/rcS.d
Register --test-no AUTH-9304 --os Solaris --weight L --network NO --description "Check single user login configuration"
if [ ${SKIPTEST} -eq 0 ]; then
# Check if file exists (Solaris 10 does not have this file by default)
if [ -f /etc/default/sulogin ]; then
logtext "Result: file /etc/default/sulogin exists"
logtext "Test: checking presence PASSREQ=NO"
FIND=`grep "^PASSREQ=NO" /etc/default/sulogin`
if [ "${FIND}" = "" ]; then
logtext "Result: option not present or configured to request a password at single user mode login"
Display --indent 2 --text "- Checking Solaris /etc/default/sulogin file" --result OK --color GREEN
AddHP 1 1
else
logtext "Result: option present, no password needed at single user mode login"
Display --indent 2 --text "- Checking Solaris /etc/default/sulogin file" --result WARNING --color RED
ReportWarning ${TEST_NO} "H" "No password needed for single user mode login"
AddHP 0 1
fi
else
logtext "Result: file /etc/default/sulogin does not exist"
fi
fi
#
#################################################################################
#
# Test : AUTH-9306
# Description : Check if authentication is needed to boot the system
# Notes : :d_boot_authenticate: is a good option for production machines to
# avoid unauthorized booting of systems. Option :d_boot_autentication@:
# disabled a required login.
Register --test-no AUTH-9306 --os HP-UX --weight L --network NO --description "Check single boot authentication"
if [ ${SKIPTEST} -eq 0 ]; then
# Check if file exists
logtext "Test: Searching /tcb/files/auth/system/default"
if [ -f /tcb/files/auth/system/default ]; then
logtext "Result: file /tcb/files/auth/system/default exists"
logtext "Test: checking presence :d_boot_authenticate@:"
FIND=`grep "^:d_boot_authenticate@" /tcb/files/auth/system/default`
if [ "${FIND}" = "" ]; then
logtext "Result: option not set, password is needed at boot"
Display --indent 2 --text "- Checking HP-UX boot authentication" --result OK --color GREEN
AddHP 1 1
else
logtext "Result: option present, no password needed at single user mode login"
Display --indent 2 --text "- Checking HP-UX boot authentication" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Set password for system boot"
AddHP 0 1
fi
else
logtext "Result: file /tcb/files/auth/system/default does not exist"
fi
fi
#
#################################################################################
#
# Test : AUTH-9308
# Description : Check single user mode login for Linux
Register --test-no AUTH-9308 --os Linux --weight L --network NO --description "Check single user login configuration"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
# Check if file exists
logtext "Test: Searching /etc/inittab"
if [ -f /etc/inittab ]; then
logtext "Result: file /etc/inittab exists"
logtext "Test: checking presence sulogin for single user mode"
FIND=`grep "^~~:S:wait:/sbin/sulogin" /etc/inittab`
FIND2=`grep "^su:S:wait:/sbin/sulogin" /etc/inittab`
if [ ! "${FIND}" = "" -o ! "${FIND2}" = "" ]; then
FOUND=1
logtext "Result: found sulogin, so single user is protected"
fi
else
logtext "Result: file /etc/inittab does not exist"
fi
# Check if file exists
logtext "Test: Searching /etc/sysconfig/init"
if [ -f /etc/sysconfig/init ]; then
logtext "Result: file /etc/sysconfig/init exists"
logtext "Test: checking presence sulogin for single user mode"
FIND=`grep "^SINGLE=/sbin/sulogin" /etc/sysconfig/init`
if [ ! "${FIND}" = "" ]; then
FOUND=1
logtext "Result: found sulogin, so single user is protected"
fi
else
logtext "Result: file /etc/inittab does not exist"
fi
if [ -f /etc/inittab -o -f /etc/sysconfig/init ]; then
if [ ${FOUND} -eq 0 ]; then
logtext "Result: option not set, no password needed at single user mode boot"
Display --indent 2 --text "- Checking Linux single user mode authentication" --result WARNING --color RED
ReportWarning ${TEST_NO} "L" "No password set for single mode"
ReportSuggestion ${TEST_NO} "Set password for single user mode to minimize physical access attack surface"
AddHP 0 2
else
logtext "Result: option set, password is needed at single user mode boot"
Display --indent 2 --text "- Checking Linux single user mode authentication" --result OK --color GREEN
AddHP 2 2
fi
else
logtext "Result: No inittab or init file found, unsure if system is protected"
fi
fi
#
#################################################################################
#
# Test : AUTH-9328
# Description : Check default umask in common files
# Notes: This test should be moved later to shells section
# /etc/login.defs
# pam_umask
Register --test-no AUTH-9328 --weight L --network NO --description "Default umask values"
if [ ${SKIPTEST} -eq 0 ]; then
Display --indent 2 --text "- Determining default umask"
# /etc/profile
logtext "Test: Checking /etc/profile"
if [ -f /etc/profile ]; then
logtext "Result: file /etc/profile exists"
logtext "Test: Checking umask value in /etc/profile"
FIND=`grep "umask" /etc/profile | sed 's/^[ \t]*//' | grep -v "^#" | awk '{ print $2 }'`
FIND2=`grep "umask" /etc/profile | sed 's/^[ \t]*//' | grep -v "^#" | awk '{ print $2 }' | wc -l`
#FIND2=`egrep "^([[:space:]])([[:tab:]])*umask" /etc/profile | awk '{ print $2 }' | wc -l`
WEAK_UMASK=0
FOUND_UMASK=0
if [ "${FIND2}" = "0" ]; then
logtext "Result: did not find umask in /etc/profile"
elif [ "${FIND2}" = "1" ]; then
logtext "Result: found umask (prefixed with spaces)"
FOUND_UMASK=1
if [ ! "${FIND}" = "077" -a ! "${FIND}" = "027" ]; then
logtext "Result: found umask ${FIND}, which could be more strict"
WEAK_UMASK=1
else
logtext "Result: found umask ${FIND}, which is fine"
fi
# Found more than 1 umask value in profile
else
logtext "Result: found multiple umask values configured in /etc/profile"
FOUND_UMASK=1
for I in ${FIND}; do
if [ ! "${I}" = "077" -a ! "${I}" = "027" ]; then
logtext "Result: umask ${I} could be more strict"
WEAK_UMASK=1
else
logtext "Result: Found umask ${I}, which is fine"
fi
done
AddHP 1 2
fi
if [ ${FOUND_UMASK} -eq 1 ]; then
if [ ${WEAK_UMASK} -eq 0 ]; then
Display --indent 4 --text "- Checking umask (/etc/profile)" --result OK --color GREEN
AddHP 2 2
else
Display --indent 4 --text "- Checking umask (/etc/profile)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/profile could be more strict like 027"
AddHP 0 2
fi
else
logtext "Result: found no umask. Please check if this is correct"
Display --indent 4 --text "- Checking umask (/etc/profile)" --result "NOT FOUND" --color YELLOW
ReportException "${TEST_NO}:01"
ReportManual "AUTH-9328:01"
AddHP 0 2
fi
else
logtext "Result: file /etc/profile does not exist"
fi
# /etc/passwd
logtext "Test: Checking umask entries in /etc/passwd (pam_umask)"
if [ -f /etc/passwd ]; then
logtext "Result: file /etc/passwd exists"
logtext "Test: Checking umask value in /etc/passwd"
FIND=`grep "umask=" /etc/passwd`
if [ "${FIND}" = "" ]; then
ReportManual "AUTH-9328:03"
fi
else
logtext "Result: file /etc/passwd does not exist"
fi
# /etc/login.defs
logtext "Test: Checking /etc/login.defs"
if [ -f /etc/login.defs ]; then
logtext "Result: file /etc/login.defs exists"
logtext "Test: Checking umask value in /etc/login.defs"
FIND=`grep "^UMASK" /etc/login.defs | awk '{ print $2 }'`
if [ "${FIND}" = "" ]; then
logtext "Result: umask value is not configured (most likely it will have the default 022 value)"
Display --indent 4 --text "- Checking umask (/etc/login.defs)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/login.defs could not be found and defaults usually to 022, which could be more strict like 027"
AddHP 1 2
elif [ "${FIND}" = "077" -o "${FIND}" = "027" ]; then
logtext "Result: umask is ${FIND}, which is fine"
Display --indent 4 --text "- Checking umask (/etc/login.defs)" --result OK --color GREEN
AddHP 2 2
else
logtext "Result: found umask ${FIND}, which could be improved"
Display --indent 4 --text "- Checking umask (/etc/login.defs)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/login.defs could be more strict like 027"
AddHP 0 2
fi
else
logtext "Result: file /etc/login.defs does not exist"
fi
# Red Hat /etc/init.d/functions
logtext "Test: Checking /etc/init.d/functions"
if [ -f /etc/init.d/functions ]; then
logtext "Result: file /etc/init.d/functions exists"
logtext "Test: Checking umask value in /etc/init.d/functions"
FIND=`grep "^umask" /etc/init.d/functions | awk '{ print $2 }'`
if [ "${FIND}" = "" ]; then
logtext "Result: umask is not configured"
Display --indent 4 --text "- Checking umask (/etc/init.d/functions)" --result NONE --color WHITE
elif [ "${FIND}" = "077" -o "${FIND}" = "027" ]; then
logtext "Result: umask is ${FIND}, which is fine"
Display --indent 4 --text "- Checking umask (/etc/init.d/functions)" --result OK --color GREEN
AddHP 2 2
else
logtext "Result: found umask ${FIND}, which could be improved"
Display --indent 4 --text "- Checking umask (/etc/init.d/functions)" --result SUGGESTION --color YELLOW
AddHP 0 2
fi
else
logtext "Result: file /etc/init.d/functions does not exist"
fi
# /etc/init.d/rc
logtext "Test: Checking /etc/init.d/rc"
if [ -f /etc/init.d/rc ]; then
logtext "Result: file /etc/init.d/rc exists"
logtext "Test: Checking UMASK value in /etc/init.d/rc"
FIND=`grep -i "^UMASK" /etc/init.d/rc | awk '{ print $2 }'`
if [ "${FIND}" = "" ]; then
logtext "Result: UMASK value is not configured (most likely it will have the default 022 value)"
Display --indent 4 --text "- Checking umask (/etc/init.d/rc)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/init.d/rc could not be found and defaults usually to 022, which could be more strict like 027"
AddHP 1 2
elif [ "${FIND}" = "077" -o "${FIND}" = "027" ]; then
logtext "Result: umask is ${FIND}, which is fine"
Display --indent 4 --text "- Checking umask (/etc/init.d/rc)" --result OK --color GREEN
AddHP 2 2
else
logtext "Result: found umask ${FIND}, which could be improved"
Display --indent 4 --text "- Checking umask (/etc/init.d/rc)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/init.d/rc could be more strict like 027"
AddHP 0 2
fi
else
logtext "Result: file /etc/init.d/rc does not exist"
fi
# /etc/init.d/rcS
logtext "Test: Checking /etc/init.d/rcS"
if [ -f /etc/init.d/rcS ]; then
logtext "Result: file /etc/init.d/rcS exists"
logtext "Test: Checking if script runs another script."
FIND=`grep -i "^exec " /etc/init.d/rcS | awk '{ print $2 }'`
if [ "${FIND}" = "" ]; then
FIND2=`grep -i "^UMASK" /etc/init.d/rcS | awk '{ print $2 }'`
if [ "${FIND2}" = "" ]; then
logtext "Result: UMASK value is not configured (most likely it will have the default 022 value)"
Display --indent 4 --text "- Checking umask (/etc/init.d/rcS)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/init.d/rcS could not be found and defaults usually to 022, which could be more strict like 027"
AddHP 1 2
elif [ "${FIND2}" = "077" -o "${FIND2}" = "027" ]; then
logtext "Result: umask is ${FIND2}, which is fine"
Display --indent 4 --text "- Checking umask (/etc/init.d/rcS)" --result OK --color GREEN
AddHP 2 2
else
logtext "Result: found umask ${FIND2}, which could be improved"
Display --indent 4 --text "- Checking umask (/etc/init.d/rcS)" --result SUGGESTION --color YELLOW
ReportSuggestion ${TEST_NO} "Default umask in /etc/init.d/rcS could be more strict like 027"
AddHP 0 2
fi
else
# Improve check
logtext "Result: exec line present in file, setting of umask not needed in this script"
logtext "Output: ${FIND}"
fi
else
logtext "Result: file /etc/init.d/rcS does not exist"
fi
fi
#
#################################################################################
#
# Test : AUTH-9340
# Description : Solaris account locking
Register --test-no AUTH-9340 --os Solaris --weight L --network NO --description "Solaris account locking"
if [ ${SKIPTEST} -eq 0 ]; then
FOUND=0
if [ -f /etc/security/policy.conf ]; then
logtext "Result: found /etc/security/policy.conf"
FIND=`grep "^LOCK_AFTER_RETRIES" /etc/security/policy.conf`
if [ ! "${FIND}" = "" ]; then
FOUND=1
logtext "Result: account locking option set"
logtext "Output: ${FIND}"
AddHP 2 2
else
logtext "Result: option LOCK_AFTER_RETRIES not set"
AddHP 1 2
fi
else
logtext "Result: /etc/security/policy.conf does not exist"
fi
# If policy.conf does not exist, we most likely deal with a Solaris version below 10
# and we proceed with checking the softer option RETRIES in /etc/default/login
# which does not lock account, but discourages brute force password attacks.
if [ ${FOUND} -eq 0 ]; then
logtext "Test: checking /etc/default/login"
if [ -f /etc/default/login ]; then
logtext "Result: file /etc/default/login exists"
FIND=`grep "^RETRIES" /etc/default/login`
if [ ! "${FIND}" = "" ]; then
FOUND=1
logtext "Result: retries option configured"
logtext "Output: ${FIND}"
AddHP 2 2
else
logtext "Result: retries option not configured"
AddHP 1 2
fi
else
logtext "Result: file /etc/default/login does not exist"
fi
fi
if [ ${FOUND} -eq 1 ]; then
Display --indent 2 --text "- Checking account locking" --result "ENABLED" --color GREEN
else
Display --indent 2 --text "- Checking account locking" --result "NOT ENABLED" --color YELLOW
fi
fi
#
#################################################################################
#
# Test : AUTH-9402
# Description : Query LDAP authentication support
Register --test-no AUTH-9402 --weight L --network NO --description "Query LDAP authentication support"
if [ ${SKIPTEST} -eq 0 ]; then
if [ -f /etc/nsswitch.conf ]; then
FIND=`egrep "^passwd" /etc/nsswitch.conf | grep "ldap"`
if [ "${FIND}" = "" ]; then
logtext "Result: LDAP authentication not enabled"
Display --indent 2 --text "- Checking LDAP authentication support" --result "NOT ENABLED" --color WHITE
else
logtext "Result: LDAP authentication enabled"
Display --indent 2 --text "- Checking LDAP authentication support" --result "ENABLED" --color GREEN
LDAP_AUTH_ENABLED=1
fi
else
logtext "Result: /etc/nsswitch.conf not found"
fi
fi
#
#################################################################################
#
# Test : AUTH-9406
# Description : Check LDAP servers in client configuration
if [ ${LDAP_AUTH_ENABLED} -eq 1 ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
Register --test-no AUTH-9406 --preqs-met ${PREQS_MET} --weight L --network NO --description "Query LDAP servers in client configuration"
if [ ${SKIPTEST} -eq 0 ]; then
logtext "Test: checking ldap.conf options"
for I in ${LDAP_CONF_LOCATIONS}; do
logtext "Test: checking ${I}"
if [ -f ${I} ]; then
logtext "Result: file ${I} exists, LDAP being used"
LDAP_CLIENT_CONFIG_FILE="${I}"
logtext "Test: checking LDAP servers in file ${I}"
FIND2=`egrep "^host " ${I} | awk '{ print $2 }'`
for I in ${FIND2}; do
Display --indent 6 --text "LDAP server: ${I}"
logtext "Result: found LDAP server ${I}"
report "ldap_server[]=${I}"
done
else
logtext "Result: ${I} does NOT exist"
fi
done
fi
#
#################################################################################
#
report "ldap_auth_enabled=${LDAP_AUTH_ENABLED}"
report "ldap_pam_enabled=${LDAP_PAM_ENABLED}"
if [ ! "${LDAP_CLIENT_CONFIG_FILE}" = "" ]; then
report "ldap_config_file=${LDAP_CLIENT_CONFIG_FILE}"
fi
wait_for_keypress
#
#================================================================================
# Lynis - Copyright 2007-2015, Michael Boelen, CISOfy - https://cisofy.com
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