262 lines
No EOL
10 KiB
Text
262 lines
No EOL
10 KiB
Text
# -- 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.
|
|
#
|
|
SecRequestBodyLimit 13107200
|
|
SecRequestBodyNoFilesLimit 131072
|
|
|
|
# What to 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?
|
|
#
|
|
# Here is a short description about the ModSecurity Multipart parser: the
|
|
# parser returns with value 0, if all "boundary-like" line matches with
|
|
# the boundary string which given in MIME header. In any other cases it returns
|
|
# with different value, eg. 1 or 2.
|
|
#
|
|
# The RFC 1341 descript the multipart content-type and its syntax must contains
|
|
# only three mandatory lines (above the content):
|
|
# * Content-Type: multipart/mixed; boundary=BOUNDARY_STRING
|
|
# * --BOUNDARY_STRING
|
|
# * --BOUNDARY_STRING--
|
|
#
|
|
# First line indicates, that this is a multipart content, second shows that
|
|
# here starts a part of the multipart content, third shows the end of content.
|
|
#
|
|
# If there are any other lines, which starts with "--", then it should be
|
|
# another boundary id - or not.
|
|
#
|
|
# After 3.0.3, there are two kinds of types of boundary errors: strict and permissive.
|
|
#
|
|
# If multipart content contains the three necessary lines with correct order, but
|
|
# there are one or more lines with "--", then parser returns with value 2 (non-zero).
|
|
#
|
|
# If some of the necessary lines (usually the start or end) misses, or the order
|
|
# is wrong, then parser returns with value 1 (also a non-zero).
|
|
#
|
|
# You can choose, which one is what you need. The example below contains the
|
|
# 'strict' mode, which means if there are any lines with start of "--", then
|
|
# ModSecurity blocked the content. But the next, commented example contains
|
|
# the 'permissive' mode, then you check only if the necessary lines exists in
|
|
# correct order. Whit this, you can enable to upload PEM files (eg "----BEGIN.."),
|
|
# or other text files, which contains eg. HTTP headers.
|
|
#
|
|
# The difference is only the operator - in strict mode (first) the content blocked
|
|
# in case of any non-zero value. In permissive mode (second, commented) the
|
|
# content blocked only if the value is explicit 1. If it 0 or 2, the content will
|
|
# allowed.
|
|
#
|
|
|
|
#
|
|
# See #1747 and #1924 for further information on the possible values for
|
|
# MULTIPART_UNMATCHED_BOUNDARY.
|
|
#
|
|
SecRule MULTIPART_UNMATCHED_BOUNDARY "@eq 1" \
|
|
"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 1000
|
|
SecPcreMatchLimitRecursion 1000
|
|
|
|
# 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/xml
|
|
|
|
# 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 ABIJDEFHZ
|
|
|
|
# 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/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 |