Backport early blocking feature
Resolves: rhbz#2115313
This commit is contained in:
Tomas Korbar
parent
eff83675d7
commit
5ac54f1ac0
424
mod_security_crs-early-blocking.patch
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424
mod_security_crs-early-blocking.patch
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commit 8acabc1806d3c9be5f781da978a7684639b257d8
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Author: Tomas Korbar <tkorbar@redhat.com>
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Date: Thu Aug 4 12:13:03 2022 +0200
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Add early blocking feature
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diff --git a/crs-setup.conf.example b/crs-setup.conf.example
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index 6e18996..08c719e 100644
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--- a/crs-setup.conf.example
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+++ b/crs-setup.conf.example
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@@ -233,7 +233,7 @@ SecDefaultAction "phase:2,log,auditlog,pass"
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#
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-# -- [[ Anomaly Mode Severity Levels ]] ----------------------------------------
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+# -- [[ Anomaly Scoring Mode Severity Levels ]] --------------------------------
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#
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# Each rule in the CRS has an associated severity level.
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# These are the default scoring points for each severity level.
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@@ -269,7 +269,7 @@ SecDefaultAction "phase:2,log,auditlog,pass"
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#
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-# -- [[ Anomaly Mode Blocking Threshold Levels ]] ------------------------------
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+# -- [[ Anomaly Scoring Mode Blocking Threshold Levels ]] ----------------------
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#
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# Here, you can specify at which cumulative anomaly score an inbound request,
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# or outbound response, gets blocked.
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@@ -318,6 +318,35 @@ SecDefaultAction "phase:2,log,auditlog,pass"
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# setvar:tx.outbound_anomaly_score_threshold=4"
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#
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+# -- [[ Early Anomaly Scoring Mode Blocking ]] ------------------------------
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+#
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+# The anomaly scores for the request and the responses are generally summed up
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+# and evaluated at the end of phase:2 and at the end of phase:4 respectively.
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+# However, it is possible to enable an early evaluation of these anomaly scores
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+# at the end of phase:1 and at the end of phase:3.
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+#
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+# If a request (or a response) hits the anomaly threshold in this early
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+# evaluation, then blocking happens immediately (if blocking is enabled) and
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+# the phase 2 (and phase 4 respectively) will no longer be executed.
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+#
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+# Enable the rule 900120 that sets the variable tx.blocking_early to 1 in order
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+# to enable early blocking. The variable tx.blocking_early is set to 0 by
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+# default. Early blocking is thus disabled by default.
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+#
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+# Please note that blocking early will hide potential alerts from you. This
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+# means that a payload that would appear in an alert in phase 2 (or phase 4)
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+# does not get evaluated if the request is being blocked early. So when you
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+# disabled blocking early again at some point in the future, then new alerts
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+# from phase 2 might pop up.
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+#SecAction \
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+# "id:900120,\
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+# phase:1,\
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+# nolog,\
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+# pass,\
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+# t:none,\
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+# setvar:tx.blocking_early=1"
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+
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+
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# -- [[ Application Specific Rule Exclusions ]] ----------------------------------------
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#
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# Some well-known applications may undertake actions that appear to be
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diff --git a/rules/REQUEST-901-INITIALIZATION.conf b/rules/REQUEST-901-INITIALIZATION.conf
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index 2a6f74e..b279829 100644
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--- a/rules/REQUEST-901-INITIALIZATION.conf
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+++ b/rules/REQUEST-901-INITIALIZATION.conf
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@@ -88,6 +88,15 @@ SecRule &TX:outbound_anomaly_score_threshold "@eq 0" \
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ver:'OWASP_CRS/3.3.0',\
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setvar:'tx.outbound_anomaly_score_threshold=4'"
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+# Default Blocking Early (rule 900120 in setup.conf)
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+SecRule &TX:blocking_early "@eq 0" \
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+ "id:901115,\
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+ phase:1,\
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+ pass,\
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+ nolog,\
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+ ver:'OWASP_CRS/3.3.0',\
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+ setvar:'tx.blocking_early=0'"
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+
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# Default Paranoia Level (rule 900000 in setup.conf)
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SecRule &TX:paranoia_level "@eq 0" \
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"id:901120,\
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diff --git a/rules/REQUEST-949-BLOCKING-EVALUATION.conf b/rules/REQUEST-949-BLOCKING-EVALUATION.conf
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index 5f370a1..338ce88 100644
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--- a/rules/REQUEST-949-BLOCKING-EVALUATION.conf
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+++ b/rules/REQUEST-949-BLOCKING-EVALUATION.conf
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@@ -11,7 +11,66 @@
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# -= Paranoia Level 0 (empty) =- (apply unconditionally)
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#
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-# Summing up the anomaly score.
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+# Skipping early blocking
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+
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+SecRule TX:BLOCKING_EARLY "!@eq 1" \
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+ "id:949050,\
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+ phase:1,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ skipAfter:BLOCKING_EARLY_ANOMALY_SCORING"
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+
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+SecRule TX:BLOCKING_EARLY "!@eq 1" \
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+ "id:949051,\
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+ phase:2,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ skipAfter:BLOCKING_EARLY_ANOMALY_SCORING"
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+
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+# Summing up the anomaly score for early blocking
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 1" \
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+ "id:949052,\
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+ phase:1,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl1}'"
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 2" \
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+ "id:949053,\
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+ phase:1,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl2}'"
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 3" \
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+ "id:949054,\
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+ phase:1,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl3}'"
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 4" \
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+ "id:949055,\
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+ phase:1,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl4}'"
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+
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+SecAction "id:949059,\
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+ phase:2,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=0'"
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+
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+SecMarker BLOCKING_EARLY_ANOMALY_SCORING
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# NOTE: tx.anomaly_score should not be set initially, but masking would lead to difficult bugs.
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# So we add to it.
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@@ -92,6 +151,21 @@ SecRule TX:ANOMALY_SCORE "@ge %{tx.inbound_anomaly_score_threshold}" \
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severity:'CRITICAL',\
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setvar:'tx.inbound_anomaly_score=%{tx.anomaly_score}'"
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+SecRule TX:BLOCKING_EARLY "@eq 1" \
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+ "id:949111,\
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+ phase:1,\
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+ deny,\
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+ t:none,\
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+ msg:'Inbound Anomaly Score Exceeded in phase 1 (Total Score: %{TX.ANOMALY_SCORE})',\
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+ tag:'application-multi',\
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+ tag:'language-multi',\
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+ tag:'platform-multi',\
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+ tag:'attack-generic',\
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+ ver:'OWASP_CRS/3.3.0',\
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+ severity:'CRITICAL',\
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+ chain"
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+ SecRule TX:ANOMALY_SCORE "@ge %{tx.inbound_anomaly_score_threshold}" \
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+ "setvar:'tx.inbound_anomaly_score=%{tx.anomaly_score}'"
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SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 1" "id:949011,phase:1,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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diff --git a/rules/REQUEST-949-BLOCKING-EVALUATION.conf.orig b/rules/REQUEST-949-BLOCKING-EVALUATION.conf.orig
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new file mode 100644
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index 0000000..5f370a1
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--- /dev/null
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+++ b/rules/REQUEST-949-BLOCKING-EVALUATION.conf.orig
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@@ -0,0 +1,132 @@
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+# ------------------------------------------------------------------------
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+# OWASP ModSecurity Core Rule Set ver.3.3.0
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+# Copyright (c) 2006-2020 Trustwave and contributors. All rights reserved.
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+#
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+# The OWASP ModSecurity Core Rule Set is distributed under
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+# Apache Software License (ASL) version 2
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+# Please see the enclosed LICENSE file for full details.
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+# ------------------------------------------------------------------------
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+
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+#
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+# -= Paranoia Level 0 (empty) =- (apply unconditionally)
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+#
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+
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+# Summing up the anomaly score.
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+
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+# NOTE: tx.anomaly_score should not be set initially, but masking would lead to difficult bugs.
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+# So we add to it.
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+SecRule TX:PARANOIA_LEVEL "@ge 1" \
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+ "id:949060,\
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+ phase:2,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl1}'"
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 2" \
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+ "id:949061,\
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+ phase:2,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl2}'"
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 3" \
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+ "id:949062,\
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+ phase:2,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl3}'"
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+
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+SecRule TX:PARANOIA_LEVEL "@ge 4" \
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+ "id:949063,\
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+ phase:2,\
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+ pass,\
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+ t:none,\
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+ nolog,\
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+ setvar:'tx.anomaly_score=+%{tx.anomaly_score_pl4}'"
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+
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+
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+SecMarker "BEGIN-REQUEST-BLOCKING-EVAL"
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+
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+# These rules use the anomaly score settings specified in the 10 config file.
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+# You should also set the desired disruptive action (deny, redirect, etc...).
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+#
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+# -=[ IP Reputation Checks ]=-
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+#
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+# Block based on variable IP.REPUT_BLOCK_FLAG and TX.DO_REPUT_BLOCK
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+#
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+SecRule IP:REPUT_BLOCK_FLAG "@eq 1" \
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+ "id:949100,\
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+ phase:2,\
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+ deny,\
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+ log,\
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+ msg:'Request Denied by IP Reputation Enforcement',\
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+ logdata:'Previous Block Reason: %{ip.reput_block_reason}',\
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+ tag:'application-multi',\
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+ tag:'language-multi',\
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+ tag:'platform-multi',\
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+ tag:'attack-reputation-ip',\
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+ ver:'OWASP_CRS/3.3.0',\
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+ severity:'CRITICAL',\
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+ chain"
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+ SecRule TX:DO_REPUT_BLOCK "@eq 1" \
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+ "setvar:'tx.inbound_anomaly_score=%{tx.anomaly_score}'"
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+
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+#
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+# -=[ Anomaly Mode: Overall Transaction Anomaly Score ]=-
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+#
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+SecRule TX:ANOMALY_SCORE "@ge %{tx.inbound_anomaly_score_threshold}" \
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+ "id:949110,\
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+ phase:2,\
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+ deny,\
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+ t:none,\
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+ log,\
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+ msg:'Inbound Anomaly Score Exceeded (Total Score: %{TX.ANOMALY_SCORE})',\
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+ tag:'application-multi',\
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+ tag:'language-multi',\
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+ tag:'platform-multi',\
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+ tag:'attack-generic',\
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+ ver:'OWASP_CRS/3.3.0',\
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+ severity:'CRITICAL',\
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+ setvar:'tx.inbound_anomaly_score=%{tx.anomaly_score}'"
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+
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+
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+
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 1" "id:949011,phase:1,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 1" "id:949012,phase:2,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+#
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+# -= Paranoia Level 1 (default) =- (apply only when tx.executing_paranoia_level is sufficiently high: 1 or higher)
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+#
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+
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+
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+
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 2" "id:949013,phase:1,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 2" "id:949014,phase:2,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+#
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+# -= Paranoia Level 2 =- (apply only when tx.executing_paranoia_level is sufficiently high: 2 or higher)
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+#
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+
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+
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+
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 3" "id:949015,phase:1,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 3" "id:949016,phase:2,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+#
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+# -= Paranoia Level 3 =- (apply only when tx.executing_paranoia_level is sufficiently high: 3 or higher)
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+#
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+
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+
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+
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 4" "id:949017,phase:1,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 4" "id:949018,phase:2,pass,nolog,skipAfter:END-REQUEST-949-BLOCKING-EVALUATION"
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+#
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+# -= Paranoia Level 4 =- (apply only when tx.executing_paranoia_level is sufficiently high: 4 or higher)
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+#
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+
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+
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+
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+#
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+# -= Paranoia Levels Finished =-
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+#
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+SecMarker "END-REQUEST-949-BLOCKING-EVALUATION"
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diff --git a/rules/RESPONSE-950-DATA-LEAKAGES.conf b/rules/RESPONSE-950-DATA-LEAKAGES.conf
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index c34607e..a192359 100644
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--- a/rules/RESPONSE-950-DATA-LEAKAGES.conf
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+++ b/rules/RESPONSE-950-DATA-LEAKAGES.conf
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@@ -95,7 +95,7 @@ SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 2" "id:950014,phase:4,pass,nolog,skipAf
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#
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SecRule RESPONSE_STATUS "@rx ^5\d{2}$" \
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"id:950100,\
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- phase:4,\
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+ phase:3,\
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block,\
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capture,\
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t:none,\
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diff --git a/rules/RESPONSE-959-BLOCKING-EVALUATION.conf b/rules/RESPONSE-959-BLOCKING-EVALUATION.conf
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index 8f8114c..26b525c 100644
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--- a/rules/RESPONSE-959-BLOCKING-EVALUATION.conf
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+++ b/rules/RESPONSE-959-BLOCKING-EVALUATION.conf
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@@ -21,7 +21,67 @@
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# -= Paranoia Level 0 (empty) =- (apply unconditionally)
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#
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|
-# Summing up the anomaly score.
|
||||||
|
+
|
||||||
|
+# Skipping early blocking
|
||||||
|
+
|
||||||
|
+SecRule TX:BLOCKING_EARLY "!@eq 1" \
|
||||||
|
+ "id:959050,\
|
||||||
|
+ phase:3,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ skipAfter:BLOCKING_EARLY_ANOMALY_SCORING"
|
||||||
|
+
|
||||||
|
+SecRule TX:BLOCKING_EARLY "!@eq 1" \
|
||||||
|
+ "id:959051,\
|
||||||
|
+ phase:4,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ skipAfter:BLOCKING_EARLY_ANOMALY_SCORING"
|
||||||
|
+
|
||||||
|
+# Summing up the anomaly score for early blocking
|
||||||
|
+
|
||||||
|
+SecRule TX:PARANOIA_LEVEL "@ge 1" \
|
||||||
|
+ "id:959052,\
|
||||||
|
+ phase:3,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ setvar:'tx.outbound_anomaly_score=+%{tx.anomaly_score_pl1}'"
|
||||||
|
+
|
||||||
|
+SecRule TX:PARANOIA_LEVEL "@ge 2" \
|
||||||
|
+ "id:959053,\
|
||||||
|
+ phase:3,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ setvar:'tx.outbound_anomaly_score=+%{tx.anomaly_score_pl2}'"
|
||||||
|
+
|
||||||
|
+SecRule TX:PARANOIA_LEVEL "@ge 3" \
|
||||||
|
+ "id:959054,\
|
||||||
|
+ phase:3,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ setvar:'tx.outbound_anomaly_score=+%{tx.anomaly_score_pl3}'"
|
||||||
|
+
|
||||||
|
+SecRule TX:PARANOIA_LEVEL "@ge 4" \
|
||||||
|
+ "id:959055,\
|
||||||
|
+ phase:3,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ setvar:'tx.outbound_anomaly_score=+%{tx.anomaly_score_pl4}'"
|
||||||
|
+
|
||||||
|
+SecAction "id:959059,\
|
||||||
|
+ phase:4,\
|
||||||
|
+ pass,\
|
||||||
|
+ t:none,\
|
||||||
|
+ nolog,\
|
||||||
|
+ setvar:'tx.outbound_anomaly_score=0'"
|
||||||
|
+
|
||||||
|
+SecMarker BLOCKING_EARLY_ANOMALY_SCORING
|
||||||
|
|
||||||
|
# NOTE: tx.anomaly_score should not be set initially, but masking would lead to difficult bugs.
|
||||||
|
# So we add to it.
|
||||||
|
@@ -75,6 +135,21 @@ SecRule TX:OUTBOUND_ANOMALY_SCORE "@ge %{tx.outbound_anomaly_score_threshold}" \
|
||||||
|
ver:'OWASP_CRS/3.3.0',\
|
||||||
|
setvar:'tx.anomaly_score=+%{tx.outbound_anomaly_score}'"
|
||||||
|
|
||||||
|
+SecRule TX:BLOCKING_EARLY "@eq 1" \
|
||||||
|
+ "id:959101,\
|
||||||
|
+ phase:3,\
|
||||||
|
+ deny,\
|
||||||
|
+ t:none,\
|
||||||
|
+ msg:'Outbound Anomaly Score Exceeded in phase 3 (Total Score: %{TX.OUTBOUND_ANOMALY_SCORE})',\
|
||||||
|
+ tag:'application-multi',\
|
||||||
|
+ tag:'language-multi',\
|
||||||
|
+ tag:'platform-multi',\
|
||||||
|
+ tag:'attack-generic',\
|
||||||
|
+ ver:'OWASP_CRS/3.3.0',\
|
||||||
|
+ severity:'CRITICAL',\
|
||||||
|
+ chain"
|
||||||
|
+ SecRule TX:OUTBOUND_ANOMALY_SCORE "@ge %{tx.outbound_anomaly_score_threshold}" \
|
||||||
|
+ "setvar:'tx.anomaly_score=%{tx.outbound_anomaly_score}'"
|
||||||
|
|
||||||
|
|
||||||
|
SecRule TX:EXECUTING_PARANOIA_LEVEL "@lt 1" "id:959011,phase:3,pass,nolog,skipAfter:END-RESPONSE-959-BLOCKING-EVALUATION"
|
||||||
File diff suppressed because it is too large
Load Diff
@ -1,19 +1,21 @@
|
|||||||
Summary: ModSecurity Rules
|
Summary: ModSecurity Rules
|
||||||
Name: mod_security_crs
|
Name: mod_security_crs
|
||||||
Version: 3.3.0
|
Version: 3.3.0
|
||||||
Release: 3%{?dist}
|
Release: 4%{?dist}
|
||||||
License: ASL 2.0
|
License: ASL 2.0
|
||||||
URL: https://www.owasp.org/index.php/Category:OWASP_ModSecurity_Core_Rule_Set_Project
|
URL: https://www.owasp.org/index.php/Category:OWASP_ModSecurity_Core_Rule_Set_Project
|
||||||
Source: https://github.com/coreruleset/coreruleset/archive/refs/tags/v%{version}.tar.gz
|
Source: https://github.com/coreruleset/coreruleset/archive/refs/tags/v%{version}.tar.gz
|
||||||
BuildArch: noarch
|
BuildArch: noarch
|
||||||
Requires: mod_security >= 2.8.0
|
Requires: mod_security >= 2.8.0
|
||||||
Obsoletes: mod_security_crs-extras < 3.0.0
|
Obsoletes: mod_security_crs-extras < 3.0.0
|
||||||
|
Patch0: mod_security_crs-early-blocking.patch
|
||||||
|
|
||||||
%description
|
%description
|
||||||
This package provides the base rules for mod_security.
|
This package provides the base rules for mod_security.
|
||||||
|
|
||||||
%prep
|
%prep
|
||||||
%setup -q -n coreruleset-%{version}
|
%setup -q -n coreruleset-%{version}
|
||||||
|
%patch0 -p1 -b.early_blocking
|
||||||
|
|
||||||
%build
|
%build
|
||||||
|
|
||||||
@ -44,6 +46,10 @@ done
|
|||||||
%{_datarootdir}/mod_modsecurity_crs
|
%{_datarootdir}/mod_modsecurity_crs
|
||||||
|
|
||||||
%changelog
|
%changelog
|
||||||
|
* Thu Aug 04 2022 Tomas Korbar <tkorbar@redhat.com> - 3.3.0-4
|
||||||
|
- Backport early blocking feature
|
||||||
|
- Resolves: rhbz#2115313
|
||||||
|
|
||||||
* Mon Aug 09 2021 Mohan Boddu <mboddu@redhat.com> - 3.3.0-3
|
* Mon Aug 09 2021 Mohan Boddu <mboddu@redhat.com> - 3.3.0-3
|
||||||
- Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
|
- Rebuilt for IMA sigs, glibc 2.34, aarch64 flags
|
||||||
Related: rhbz#1991688
|
Related: rhbz#1991688
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user