# ------------------------------------------------------------------------
# OWASP CRS ver.4.2.0
# Copyright (c) 2006-2020 Trustwave and contributors. All rights reserved.
# Copyright (c) 2021-2024 CRS project. All rights reserved.
#
# The OWASP CRS is distributed under
# Apache Software License (ASL) version 2
# Please see the enclosed LICENSE file for full details.
# ------------------------------------------------------------------------

#
# -= Paranoia Level 0 (empty) =- (apply unconditionally)
#



SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 1" "id:930011,phase:1,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 1" "id:930012,phase:2,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
#
# -= Paranoia Level 1 (default) =- (apply only when tx.detection_paranoia_level is sufficiently high: 1 or higher)
#

#
# -=[ Directory Traversal Attacks ]=-
#
# Ref: https://github.com/wireghoul/dotdotpwn
#
# [ Encoded /../ Payloads ]
#
# Regular expression generated from regex-assembly/930100.ra.
# To update the regular expression run the following shell script
# (consult https://coreruleset.org/docs/development/regex_assembly/ for details):
#   crs-toolchain regex update 930100
#
SecRule REQUEST_URI_RAW|ARGS|REQUEST_HEADERS|!REQUEST_HEADERS:Referer|FILES|XML:/* "@rx (?i)(?:[/\x5c]|%(?:2(?:f|5(?:2f|5c|c(?:1%259c|0%25af))|%46)|5c|c(?:0%(?:[2aq]f|5c|9v)|1%(?:[19p]c|8s|af))|(?:bg%q|(?:e|f(?:8%8)?0%8)0%80%a)f|u(?:221[56]|EFC8|F025|002f)|%3(?:2(?:%(?:%6|4)6|F)|5%%63)|1u)|0x(?:2f|5c))(?:\.(?:%0[01]|\?)?|\?\.?|%(?:2(?:(?:5(?:2|c0%25a))?e|%45)|c0(?:\.|%[256aef]e)|u(?:(?:ff0|002)e|2024)|%32(?:%(?:%6|4)5|E)|(?:e|f(?:(?:8|c%80)%8)?0%8)0%80%ae)|0x2e){2,3}(?:[/\x5c]|%(?:2(?:f|5(?:2f|5c|c(?:1%259c|0%25af))|%46)|5c|c(?:0%(?:[2aq]f|5c|9v)|1%(?:[19p]c|8s|af))|(?:bg%q|(?:e|f(?:8%8)?0%8)0%80%a)f|u(?:221[56]|EFC8|F025|002f)|%3(?:2(?:%(?:%6|4)6|F)|5%%63)|1u)|0x(?:2f|5c))" \
    "id:930100,\
    phase:2,\
    block,\
    capture,\
    t:none,\
    msg:'Path Traversal Attack (/../) or (/.../)',\
    logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'platform-multi',\
    tag:'attack-lfi',\
    tag:'paranoia-level/1',\
    tag:'OWASP_CRS',\
    tag:'capec/1000/255/153/126',\
    ver:'OWASP_CRS/4.2.0',\
    severity:'CRITICAL',\
    setvar:'tx.inbound_anomaly_score_pl1=+%{tx.critical_anomaly_score}',\
    setvar:'tx.lfi_score=+%{tx.critical_anomaly_score}'"

#
# [ Decoded /../ or /..;/ Payloads ]
#
# To prevent '..' from triggering, the regexp is split into two parts:
# - ../
# - /..
# OR
# - .../
# - /...
#
# Semicolon added to prevent path traversal via reverse proxy mapping '/..;/' (Tomcat)
#
SecRule REQUEST_URI|ARGS|REQUEST_HEADERS|!REQUEST_HEADERS:Referer|FILES|XML:/* "@rx (?:(?:^|[\x5c/;])\.{2,3}[\x5c/;]|[\x5c/;]\.{2,3}(?:[\x5c/;]|$))" \
    "id:930110,\
    phase:2,\
    block,\
    capture,\
    t:none,t:utf8toUnicode,t:urlDecodeUni,t:removeNulls,t:cmdLine,\
    msg:'Path Traversal Attack (/../) or (/.../)',\
    logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'platform-multi',\
    tag:'attack-lfi',\
    tag:'paranoia-level/1',\
    tag:'OWASP_CRS',\
    tag:'capec/1000/255/153/126',\
    ver:'OWASP_CRS/4.2.0',\
    severity:'CRITICAL',\
    multiMatch,\
    setvar:'tx.inbound_anomaly_score_pl1=+%{tx.critical_anomaly_score}',\
    setvar:'tx.lfi_score=+%{tx.critical_anomaly_score}'"

#
# -=[ OS File Access ]=-
#
# We check for OS file access with the help of a local file with OS files data.
#
# Ref: https://github.com/lightos/Panoptic/blob/master/cases.xml
#
# If you wonder where support for Google OAuth2 has gone, see:
# https://github.com/coreruleset/google-oauth2-plugin
SecRule REQUEST_COOKIES|!REQUEST_COOKIES:/__utm/|REQUEST_COOKIES_NAMES|ARGS_NAMES|ARGS|XML:/* "@pmFromFile lfi-os-files.data" \
    "id:930120,\
    phase:2,\
    block,\
    capture,\
    t:none,t:utf8toUnicode,t:urlDecodeUni,t:normalizePathWin,\
    msg:'OS File Access Attempt',\
    logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'platform-multi',\
    tag:'attack-lfi',\
    tag:'paranoia-level/1',\
    tag:'OWASP_CRS',\
    tag:'capec/1000/255/153/126',\
    tag:'PCI/6.5.4',\
    ver:'OWASP_CRS/4.2.0',\
    severity:'CRITICAL',\
    setvar:'tx.lfi_score=+%{tx.critical_anomaly_score}',\
    setvar:'tx.inbound_anomaly_score_pl1=+%{tx.critical_anomaly_score}'"

#
# -=[ Restricted File Access ]=-
#
# Detects attempts to retrieve application source code, metadata,
# credentials and version control history possibly reachable in a web root.
#
SecRule REQUEST_FILENAME "@pmFromFile restricted-files.data" \
    "id:930130,\
    phase:1,\
    block,\
    capture,\
    t:none,t:utf8toUnicode,t:urlDecodeUni,t:normalizePathWin,\
    msg:'Restricted File Access Attempt',\
    logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'platform-multi',\
    tag:'attack-lfi',\
    tag:'paranoia-level/1',\
    tag:'OWASP_CRS',\
    tag:'capec/1000/255/153/126',\
    tag:'PCI/6.5.4',\
    ver:'OWASP_CRS/4.2.0',\
    severity:'CRITICAL',\
    setvar:'tx.lfi_score=+%{tx.critical_anomaly_score}',\
    setvar:'tx.inbound_anomaly_score_pl1=+%{tx.critical_anomaly_score}'"



SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 2" "id:930013,phase:1,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 2" "id:930014,phase:2,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
#
# -= Paranoia Level 2 =- (apply only when tx.detection_paranoia_level is sufficiently high: 2 or higher)
#

#
# -=[ OS File Access ]=-
#
# This is a stricter sibling of rule 930120.
# This stricter sibling checks for OS file data in request headers referer and user-agent.
# We check for OS file access with the help of a local file with OS files data.
#
# Ref: https://github.com/lightos/Panoptic/blob/master/cases.xml
#
SecRule REQUEST_HEADERS:Referer|REQUEST_HEADERS:User-Agent "@pmFromFile lfi-os-files.data" \
    "id:930121,\
    phase:1,\
    block,\
    capture,\
    t:none,t:utf8toUnicode,t:urlDecodeUni,t:normalizePathWin,\
    msg:'OS File Access Attempt in REQUEST_HEADERS',\
    logdata:'Matched Data: %{TX.0} found within %{MATCHED_VAR_NAME}: %{MATCHED_VAR}',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'platform-multi',\
    tag:'attack-lfi',\
    tag:'paranoia-level/2',\
    tag:'OWASP_CRS',\
    tag:'capec/1000/255/153/126',\
    tag:'PCI/6.5.4',\
    ver:'OWASP_CRS/4.2.0',\
    severity:'CRITICAL',\
    setvar:'tx.lfi_score=+%{tx.critical_anomaly_score}',\
    setvar:'tx.inbound_anomaly_score_pl2=+%{tx.critical_anomaly_score}'"


SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 3" "id:930015,phase:1,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 3" "id:930016,phase:2,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
#
# -= Paranoia Level 3 =- (apply only when tx.detection_paranoia_level is sufficiently high: 3 or higher)
#



SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 4" "id:930017,phase:1,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 4" "id:930018,phase:2,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-REQUEST-930-APPLICATION-ATTACK-LFI"
#
# -= Paranoia Level 4 =- (apply only when tx.detection_paranoia_level is sufficiently high: 4 or higher)
#



#
# -= Paranoia Levels Finished =-
#
SecMarker "END-REQUEST-930-APPLICATION-ATTACK-LFI"
