diff --git a/db/languages/en b/db/languages/en index 52ace1f7..689cc57e 100644 --- a/db/languages/en +++ b/db/languages/en @@ -63,6 +63,7 @@ SECTION_USB_DEVICES="USB Devices" SECTION_USERS_GROUPS_AND_AUTHENTICATION="Users, Groups and Authentication" SECTION_VIRTUALIZATION="Virtualization" SECTION_WEBSERVER="Software: webserver" +SECTION_KERBEROS="Kerberos" STATUS_ACTIVE="ACTIVE" STATUS_CHECK_NEEDED="CHECK NEEDED" STATUS_DEBUG="DEBUG" diff --git a/plugins/plugin_krb5_phase1 b/include/tests_kerberos similarity index 53% rename from plugins/plugin_krb5_phase1 rename to include/tests_kerberos index 625a3bc9..494a01b1 100644 --- a/plugins/plugin_krb5_phase1 +++ b/include/tests_kerberos @@ -1,22 +1,14 @@ #!/bin/sh -######################################################################### -# -# * DO NOT REMOVE * -#----------------------------------------------------- -# PLUGIN_AUTHOR="pyllyukko" -# PLUGIN_CATEGORY=security -# PLUGIN_DATE=2024-02-14 -# PLUGIN_DESC=Kerberos -# PLUGIN_NAME=krb5 -# PLUGIN_REQUIRED_TESTS= -# PLUGIN_VERSION=0.2 -#----------------------------------------------------- +InsertSection "${SECTION_KERBEROS}" + # ######################################################################### # - # Test for the prerequisites first + # Test : KRB-1000 + # Description : Check that Kerberos principals have passwords that expire + Register --test-no KRB-1000 --weight L --network NO --description "Check for Kerberos KDC tools" if [ -n "${KADMINLOCALBINARY}" ] && [ -n "${KDB5UTILBINARY}" ] then PREQS_MET="YES" @@ -30,10 +22,16 @@ else PREQS_MET="NO" fi + if [ "${PREQS_MET}" = "YES" ]; then + Display --indent 2 --text "- Check for Kerberos KDC and principals" --result "${STATUS_FOUND}" --color GREEN + else + Display --indent 2 --text "- Check for Kerberos KDC and principals" --result "${STATUS_NOT_FOUND}" --color WHITE + fi - # Test : KRB5-0001 + # Test : KRB-1010 # Description : Check that Kerberos principals have passwords that expire - Register --test-no KRB5-0001 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check that Kerberos principals have passwords that expire" --progress + Register --test-no KRB-1010 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check that Kerberos principals have passwords that expire" + FOUND=0 if [ ${SKIPTEST} -eq 0 ]; then for I in ${PRINCS} do @@ -41,59 +39,84 @@ if [ "${FIND}" = "Password expiration date: [never]" ] then LogText "Result: Kerberos principal ${I} has a password/key that never expires" + FOUND=1 fi done fi + if [ ${FOUND} -eq 1 ]; then + Display --indent 4 --text "- Principals without expiring password" --result "${STATUS_WARNING}" --color RED + ReportSuggestion "${TEST_NO}" "Make sure all your Kerberos principals have expiring passwords" + else + Display --indent 4 --text "- Principals without expiring password" --result "${STATUS_OK}" --color GREEN + fi # ################################################################################# # - # Test : KRB5-0002 + # Test : KRB-1020 # Description : Check last password change for Kerberos principals - Register --test-no KRB5-0002 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check last password change for Kerberos principals" --progress + Register --test-no KRB-1020 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check last password change for Kerberos principals" if [ ${SKIPTEST} -eq 0 ]; then + FOUND=0 for I in ${PRINCS} do FIND="$(${KADMINLOCALBINARY} getprinc "${I}" | ${SEDBINARY} -n '/^Last password change:\s\+/s/^Last password change:\s\+//p')" if [ "${FIND}" = "[never]" ] then LogText "Result: Kerberos principal ${I} has a password/key that has never been changed" + FOUND=1 else J="$(date -d "${FIND}" +%s)" if [ ${J} -lt $((NOW - 60 * 60 * 24 * 365)) ] then LogText "Result: Kerberos principal ${I} has had a password/key change over a year ago" + FOUND=1 fi fi done + if [ ${FOUND} -eq 1 ]; then + Display --indent 4 --text "- Principals with late password change" --result "${STATUS_WARNING}" --color RED + ReportSuggestion "${TEST_NO}" "Enforce frequent password/key change for your Kerberos principals" + else + Display --indent 4 --text "- Principals with late password change" --result "${STATUS_OK}" --color GREEN + fi fi # ################################################################################# # - # Test : KRB5-0003 + # Test : KRB-1030 # Description : Check that Kerberos principals have a policy associated to them - Register --test-no KRB5-0003 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check that Kerberos principals have a policy associated to them" --progress + Register --test-no KRB5-1030 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check that Kerberos principals have a policy associated to them" if [ ${SKIPTEST} -eq 0 ]; then + FOUND=0 for I in ${PRINCS} do FIND="$(${KADMINLOCALBINARY} getprinc "${I}" | ${GREPBINARY} '^Policy:')" if [ "${FIND}" = "Policy: [none]" ] then LogText "Result: Kerberos principal ${I} does not have a policy associated to it" + FOUND=1 fi done + if [ ${FOUND} -eq 1 ]; then + Display --indent 4 --text "- Principals without associated policy" --result "${STATUS_WARNING}" --color RED + ReportSuggestion "${TEST_NO}" "Make sure all your Kerberos principals have a policy associated to them" + else + Display --indent 4 --text "- Principals without associated policy" --result "${STATUS_OK}" --color GREEN + fi fi # ################################################################################# # - # Test : KRB5-0004 + # Test : KRB-1040 # Description : Check various attributes for Kerberos principals - Register --test-no KRB5-0004 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check various attributes for Kerberos principals" --progress + Register --test-no KRB5-1040 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check various attributes for Kerberos principals" if [ ${SKIPTEST} -eq 0 ]; then + FOUND=0 for I in ${PRINCS} do J="$(${KADMINLOCALBINARY} getprinc "${I}" | ${SEDBINARY} -n 's/^Attributes:\s\+\(.\+\)$/\1/p')" @@ -105,38 +128,53 @@ if ! ContainsString "\bLOCKDOWN_KEYS\b" "${J}" then LogText "Result: Sensitive Kerberos principal ${I} does not have the lockdown_keys attribute" + FOUND=1 fi elif ContainsString "/admin@" "${I}" then if ! ContainsString "\bDISALLOW_TGT_BASED\b" "${J}" then LogText "Result: Kerberos admin principal ${I} does not have the disallow_tgt_based attribute" + FOUND=1 fi elif ContainsString "^[^/$]+@" "${I}" then if ! ContainsString "\bREQUIRES_PRE_AUTH\b.+\bDISALLOW_SVR\b" "${J}" then LogText "Result: Regular Kerberos user principal ${I} does not have the requires_pre_auth and/or the disallow_svr attribute" + FOUND=1 fi fi done + if [ ${FOUND} -eq 1 ]; then + Display --indent 4 --text "- Checking principals for various attributes" --result "${STATUS_WARNING}" --color RED + ReportSuggestion "${TEST_NO}" "Harden your Kerberos principals with appropriate attributes" + else + Display --indent 4 --text "- Checking principals for various attributes" --result "${STATUS_OK}" --color GREEN + fi fi # ################################################################################# # - # Test : KRB5-0005 + # Test : KRB-1050 # Description : Check for weak crypto - Register --test-no KRB5-0005 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for weak crypto" --progress + Register --test-no KRB-1050 --preqs-met ${PREQS_MET} --weight L --network NO --description "Check for weak crypto" if [ ${SKIPTEST} -eq 0 ]; then FIND=$(${KDB5UTILBINARY} tabdump keyinfo | ${AWKBINARY} '$4 ~ /(des|arcfour|cbc|sha1)/{print$1,$4}') - while read I J - do - LogText "Result: Kerberos principal ${I} has a key with weak cryptographic algorithm ${J}" - done << EOF + if [ -n "${FIND}" ]; then + while read I J + do + LogText "Result: Kerberos principal ${I} has a key with weak cryptographic algorithm ${J}" + done << EOF ${FIND} EOF + Display --indent 4 --text "- Principals with weak crypto" --result "${STATUS_WARNING}" --color RED + ReportSuggestion "${TEST_NO}" "Remove weak (des|arcfour|cbc|sha1) cryptographic keys from principals" + else + Display --indent 4 --text "- Principals with weak crypto" --result "${STATUS_OK}" --color GREEN + fi fi # diff --git a/lynis b/lynis index ee6cc596..95135e92 100755 --- a/lynis +++ b/lynis @@ -1018,7 +1018,7 @@ ${NORMAL} if [ "${TEST_GROUP_TO_CHECK}" = "all" ]; then LogText "Info: perform tests from all categories" - INCLUDE_TESTS="boot_services kernel memory_processes authentication shells \ + INCLUDE_TESTS="boot_services kernel memory_processes authentication kerberos shells \ filesystems usb storage storage_nfs nameservices dns ports_packages networking printers_spoolers \ mail_messaging firewalls webservers ssh snmp databases ldap php squid logging \ insecure_services banners scheduling accounting time crypto virtualization containers \