Corrections modsecurity

tasks/main.yml

@@ -108,6 +108,7 @@
   with_items:
     - { src: custom_reverse_proxy.conf, dest: /etc/apache2/conf-enabled/ }
     - { src: custom_ssl.conf, dest: /etc/apache2/conf-enabled/ }
+    - { src: modsecurity.conf, dest: /etc/modsecurity/ }
   notify:
     - restart apache2
 

templates/custom_reverse_proxy.conf

@@ -34,72 +34,6 @@ Header set Strict-Transport-Security "max-age=16070400"
 
 
 
-# Configuration modsecurity
-SecTmpDir /var/lib/mod_security
-SecDataDir /var/lib/mod_security
-# ModSecurity Core Rules Set configuration
-IncludeOptional modsecurity.d/*.conf
-IncludeOptional modsecurity.d/activated_rules/*.conf
-
-# Default recommended configuration
-SecRuleEngine On
-SecRequestBodyAccess On
-SecRule REQUEST_HEADERS:Content-Type "text/xml" \
-"id:'200000',phase:1,t:none,t:lowercase,pass,nolog,ctl:requestBodyProcessor=XML"
-
-# 300 Mo
-SecRequestBodyLimit 314572800
-
-# 128 Ko
-SecRequestBodyNoFilesLimit 131072
-SecRequestBodyInMemoryLimit 131072
-
-SecRequestBodyLimitAction Reject
-SecRule REQBODY_ERROR "!@eq 0" \
-"id:'200001', phase:2,t:none,log,deny,status:400,msg:'Failed to parse request body.',logdata:'%{reqbody_error_msg}',severity:2"
-SecRule MULTIPART_STRICT_ERROR "!@eq 0" \
-"id:'200002',phase:2,t:none,log,deny,status:44,msg:'Multipart request body \
-failed strict validation: \
-PE %{REQBODY_PROCESSOR_ERROR}, \
-BQ %{MULTIPART_BOUNDARY_QUOTED}, \
-BW %{MULTIPART_BOUNDARY_WHITESPACE}, \
-DB %{MULTIPART_DATA_BEFORE}, \
-DA %{MULTIPART_DATA_AFTER}, \
-HF %{MULTIPART_HEADER_FOLDING}, \
-LF %{MULTIPART_LF_LINE}, \
-SM %{MULTIPART_MISSING_SEMICOLON}, \
-IQ %{MULTIPART_INVALID_QUOTING}, \
-IP %{MULTIPART_INVALID_PART}, \
-IH %{MULTIPART_INVALID_HEADER_FOLDING}, \
-FL %{MULTIPART_FILE_LIMIT_EXCEEDED}'"
-
-SecRule MULTIPART_UNMATCHED_BOUNDARY "!@eq 0" \
-"id:'200003',phase:2,t:none,log,deny,status:44,msg:'Multipart parser detected a possible unmatched boundary.'"
-
-#SecPcreMatchLimit 50000
-#SecPcreMatchLimitRecursion 50000
-SecPcreMatchLimit 250000000
-SecPcreMatchLimitRecursion 250000000
-
-SecRule TX:/^MSC_/ "!@streq 0" \
-"id:'200004',phase:2,t:none,deny,msg:'ModSecurity internal error flagged: %{MATCHED_VAR_NAME}'"
-
-SecResponseBodyAccess Off
-SecDebugLog /var/log/apache2/modsec_debug.log
-#SecDebugLogLevel 4
-SecDebugLogLevel 0
-#SecAuditEngine RelevantOnly
-SecAuditEngine Off
-SecAuditLogRelevantStatus "^(?:5|4(?!04))"
-SecAuditLogParts ABIJDEFHZ
-SecAuditLogType Serial
-SecAuditLog /var/log/apache2/modsec_audit.log
-SecArgumentSeparator &
-SecCookieFormat 0
-
-
-
-
 # Macros
 <Macro OpenAccessPolicy>
   Require all granted

templates/modsecurity.conf

@@ -0,0 +1,229 @@
+# {{ ansible_managed }}
+
+# -- Rule engine initialization ----------------------------------------------
+
+# Enable ModSecurity, attaching it to every transaction. Use detection
+# only to start with, because that minimises the chances of post-installation
+# disruption.
+#
+SecRuleEngine On
+
+
+# -- Request body handling ---------------------------------------------------
+
+# Allow ModSecurity to access request bodies. If you don't, ModSecurity
+# won't be able to see any POST parameters, which opens a large security
+# hole for attackers to exploit.
+#
+SecRequestBodyAccess On
+
+
+# Enable XML request body parser.
+# Initiate XML Processor in case of xml content-type
+#
+SecRule REQUEST_HEADERS:Content-Type "(?:application(?:/soap\+|/)|text/)xml" \
+     "id:'200000',phase:1,t:none,t:lowercase,pass,nolog,ctl:requestBodyProcessor=XML"
+
+# Enable JSON request body parser.
+# Initiate JSON Processor in case of JSON content-type; change accordingly
+# if your application does not use 'application/json'
+#
+SecRule REQUEST_HEADERS:Content-Type "application/json" \
+     "id:'200001',phase:1,t:none,t:lowercase,pass,nolog,ctl:requestBodyProcessor=JSON"
+
+# Maximum request body size we will accept for buffering. If you support
+# file uploads then the value given on the first line has to be as large
+# as the largest file you are willing to accept. The second value refers
+# to the size of data, with files excluded. You want to keep that value as
+# low as practical.
+#
+# 100M
+SecRequestBodyLimit 104857600
+SecRequestBodyNoFilesLimit 131072
+
+# Store up to 128 KB of request body data in memory. When the multipart
+# parser reaches this limit, it will start using your hard disk for
+# storage. That is slow, but unavoidable.
+#
+SecRequestBodyInMemoryLimit 131072
+
+# What do do if the request body size is above our configured limit.
+# Keep in mind that this setting will automatically be set to ProcessPartial
+# when SecRuleEngine is set to DetectionOnly mode in order to minimize
+# disruptions when initially deploying ModSecurity.
+#
+SecRequestBodyLimitAction Reject
+
+# Verify that we've correctly processed the request body.
+# As a rule of thumb, when failing to process a request body
+# you should reject the request (when deployed in blocking mode)
+# or log a high-severity alert (when deployed in detection-only mode).
+#
+SecRule REQBODY_ERROR "!@eq 0" \
+"id:'200002', phase:2,t:none,log,deny,status:400,msg:'Failed to parse request body.',logdata:'%{reqbody_error_msg}',severity:2"
+
+# By default be strict with what we accept in the multipart/form-data
+# request body. If the rule below proves to be too strict for your
+# environment consider changing it to detection-only. You are encouraged
+# _not_ to remove it altogether.
+#
+SecRule MULTIPART_STRICT_ERROR "!@eq 0" \
+"id:'200003',phase:2,t:none,log,deny,status:400, \
+msg:'Multipart request body failed strict validation: \
+PE %{REQBODY_PROCESSOR_ERROR}, \
+BQ %{MULTIPART_BOUNDARY_QUOTED}, \
+BW %{MULTIPART_BOUNDARY_WHITESPACE}, \
+DB %{MULTIPART_DATA_BEFORE}, \
+DA %{MULTIPART_DATA_AFTER}, \
+HF %{MULTIPART_HEADER_FOLDING}, \
+LF %{MULTIPART_LF_LINE}, \
+SM %{MULTIPART_MISSING_SEMICOLON}, \
+IQ %{MULTIPART_INVALID_QUOTING}, \
+IP %{MULTIPART_INVALID_PART}, \
+IH %{MULTIPART_INVALID_HEADER_FOLDING}, \
+FL %{MULTIPART_FILE_LIMIT_EXCEEDED}'"
+
+# Did we see anything that might be a boundary?
+#
+SecRule MULTIPART_UNMATCHED_BOUNDARY "!@eq 0" \
+"id:'200004',phase:2,t:none,log,deny,msg:'Multipart parser detected a possible unmatched boundary.'"
+
+# PCRE Tuning
+# We want to avoid a potential RegEx DoS condition
+#
+SecPcreMatchLimit 100000
+SecPcreMatchLimitRecursion 100000
+
+# Some internal errors will set flags in TX and we will need to look for these.
+# All of these are prefixed with "MSC_".  The following flags currently exist:
+#
+# MSC_PCRE_LIMITS_EXCEEDED: PCRE match limits were exceeded.
+#
+SecRule TX:/^MSC_/ "!@streq 0" \
+        "id:'200005',phase:2,t:none,deny,msg:'ModSecurity internal error flagged: %{MATCHED_VAR_NAME}'"
+
+
+# -- Response body handling --------------------------------------------------
+
+# Allow ModSecurity to access response bodies. 
+# You should have this directive enabled in order to identify errors
+# and data leakage issues.
+# 
+# Do keep in mind that enabling this directive does increases both
+# memory consumption and response latency.
+#
+SecResponseBodyAccess On
+
+# Which response MIME types do you want to inspect? You should adjust the
+# configuration below to catch documents but avoid static files
+# (e.g., images and archives).
+#
+SecResponseBodyMimeType text/plain text/html text/xlm
+
+# Buffer response bodies of up to 512 KB in length.
+SecResponseBodyLimit 524288
+
+# What happens when we encounter a response body larger than the configured
+# limit? By default, we process what we have and let the rest through.
+# That's somewhat less secure, but does not break any legitimate pages.
+#
+SecResponseBodyLimitAction ProcessPartial
+
+
+# -- Filesystem configuration ------------------------------------------------
+
+# The location where ModSecurity stores temporary files (for example, when
+# it needs to handle a file upload that is larger than the configured limit).
+# 
+# This default setting is chosen due to all systems have /tmp available however, 
+# this is less than ideal. It is recommended that you specify a location that's private.
+#
+SecTmpDir /tmp/
+
+# The location where ModSecurity will keep its persistent data.  This default setting 
+# is chosen due to all systems have /tmp available however, it
+# too should be updated to a place that other users can't access.
+#
+SecDataDir /tmp/
+
+
+# -- File uploads handling configuration -------------------------------------
+
+# The location where ModSecurity stores intercepted uploaded files. This
+# location must be private to ModSecurity. You don't want other users on
+# the server to access the files, do you?
+#
+#SecUploadDir /opt/modsecurity/var/upload/
+
+# By default, only keep the files that were determined to be unusual
+# in some way (by an external inspection script). For this to work you
+# will also need at least one file inspection rule.
+#
+#SecUploadKeepFiles RelevantOnly
+
+# Uploaded files are by default created with permissions that do not allow
+# any other user to access them. You may need to relax that if you want to
+# interface ModSecurity to an external program (e.g., an anti-virus).
+#
+#SecUploadFileMode 0600
+
+
+# -- Debug log configuration -------------------------------------------------
+
+# The default debug log configuration is to duplicate the error, warning
+# and notice messages from the error log.
+#
+#SecDebugLog /opt/modsecurity/var/log/debug.log
+#SecDebugLogLevel 3
+
+
+# -- Audit log configuration -------------------------------------------------
+
+# Log the transactions that are marked by a rule, as well as those that
+# trigger a server error (determined by a 5xx or 4xx, excluding 404,  
+# level response status codes).
+#
+SecAuditEngine RelevantOnly
+SecAuditLogRelevantStatus "^(?:5|4(?!04))"
+
+# Log everything we know about a transaction.
+SecAuditLogParts ABDEFHIJZ
+
+# Use a single file for logging. This is much easier to look at, but
+# assumes that you will use the audit log only ocassionally.
+#
+SecAuditLogType Serial
+SecAuditLog /var/log/apache2/modsec_audit.log
+
+# Specify the path for concurrent audit logging.
+#SecAuditLogStorageDir /opt/modsecurity/var/audit/
+
+
+# -- Miscellaneous -----------------------------------------------------------
+
+# Use the most commonly used application/x-www-form-urlencoded parameter
+# separator. There's probably only one application somewhere that uses
+# something else so don't expect to change this value.
+#
+SecArgumentSeparator &
+
+# Settle on version 0 (zero) cookies, as that is what most applications
+# use. Using an incorrect cookie version may open your installation to
+# evasion attacks (against the rules that examine named cookies).
+#
+SecCookieFormat 0
+
+# Specify your Unicode Code Point.
+# This mapping is used by the t:urlDecodeUni transformation function
+# to properly map encoded data to your language. Properly setting
+# these directives helps to reduce false positives and negatives.
+#
+SecUnicodeMapFile unicode.mapping 20127
+
+# Improve the quality of ModSecurity by sharing information about your
+# current ModSecurity version and dependencies versions.
+# The following information will be shared: ModSecurity version,
+# Web Server version, APR version, PCRE version, Lua version, Libxml2
+# version, Anonymous unique id for host.
+SecStatusEngine On
+