# ------------------------------------------------------------------------
# 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.
# ------------------------------------------------------------------------

# You should set the score to the proper threshold you would prefer. If kept at "@gt 0"
# it will work similarly to previous Mod CRS rules and will create an event in the error_log
# file if there are any rules that match.  If you would like to lessen the number of events
# generated in the error_log file, you should increase the anomaly score threshold to
# something like "@gt 20".  This would only generate an event in the error_log file if
# there are multiple lower severity rule matches or if any 1 higher severity item matches.
#
# You should also set the desired disruptive action (deny, redirect, etc...).
#

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


# Summing up the blocking and detection anomaly scores in phase 3
# even when early blocking is disabled, we need to sum up the scores in phase 3
# this prevents bugs in phase 5 if Apache skips phases because of error handling
# See: https://github.com/coreruleset/coreruleset/issues/2319#issuecomment-1047503932

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 1" \
    "id:959052,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl1}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 1" \
    "id:959152,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl1}'"

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 2" \
    "id:959053,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl2}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 2" \
    "id:959153,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl2}'"

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 3" \
    "id:959054,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl3}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 3" \
    "id:959154,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl3}'"

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 4" \
    "id:959055,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl4}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 4" \
    "id:959155,\
    phase:3,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl4}'"

# at start of phase 4, we reset the aggregate scores to 0 to prevent duplicate counting of per-PL scores
# this is necessary because the per-PL scores are counted across phases
SecAction \
    "id:959059,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=0'"

SecAction \
    "id:959159,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=0'"

SecMarker "EARLY_BLOCKING_ANOMALY_SCORING"

# Summing up the blocking and detection anomaly scores in phase 4

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 1" \
    "id:959060,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl1}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 1" \
    "id:959160,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl1}'"

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 2" \
    "id:959061,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl2}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 2" \
    "id:959161,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl2}'"

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 3" \
    "id:959062,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl3}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 3" \
    "id:959162,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl3}'"

SecRule TX:BLOCKING_PARANOIA_LEVEL "@ge 4" \
    "id:959063,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.blocking_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl4}'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@ge 4" \
    "id:959163,\
    phase:4,\
    pass,\
    t:none,\
    nolog,\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    setvar:'tx.detection_outbound_anomaly_score=+%{tx.outbound_anomaly_score_pl4}'"

#
# -=[ Anomaly Mode: Overall Transaction Anomaly Score ]=-
#

# if early blocking is active, check threshold in phase 3
SecRule TX:BLOCKING_OUTBOUND_ANOMALY_SCORE "@ge %{tx.outbound_anomaly_score_threshold}" \
    "id:959101,\
    phase:3,\
    deny,\
    t:none,\
    msg:'Outbound Anomaly Score Exceeded in phase 3 (Total Score: %{tx.blocking_outbound_anomaly_score})',\
    tag:'anomaly-evaluation',\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0',\
    chain"
    SecRule TX:EARLY_BLOCKING "@eq 1"

# always check threshold in phase 4
SecRule TX:BLOCKING_OUTBOUND_ANOMALY_SCORE "@ge %{tx.outbound_anomaly_score_threshold}" \
    "id:959100,\
    phase:4,\
    deny,\
    t:none,\
    msg:'Outbound Anomaly Score Exceeded (Total Score: %{tx.blocking_outbound_anomaly_score})',\
    tag:'anomaly-evaluation',\
    tag:'OWASP_CRS',\
    ver:'OWASP_CRS/4.2.0'"

SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 1" "id:959011,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 1" "id:959012,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
#
# -= Paranoia Level 1 (default) =- (apply only when tx.detection_paranoia_level is sufficiently high: 1 or higher)
#



SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 2" "id:959013,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 2" "id:959014,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
#
# -= Paranoia Level 2 =- (apply only when tx.detection_paranoia_level is sufficiently high: 2 or higher)
#



SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 3" "id:959015,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 3" "id:959016,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
#
# -= Paranoia Level 3 =- (apply only when tx.detection_paranoia_level is sufficiently high: 3 or higher)
#



SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 4" "id:959017,phase:3,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
SecRule TX:DETECTION_PARANOIA_LEVEL "@lt 4" "id:959018,phase:4,pass,nolog,tag:'OWASP_CRS',ver:'OWASP_CRS/4.2.0',skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
#
# -= Paranoia Level 4 =- (apply only when tx.detection_paranoia_level is sufficiently high: 4 or higher)
#



#
# -= Paranoia Levels Finished =-
#
SecMarker "END-RESPONSE-959-BLOCKING-EVALUATION"
