From: Arne Fitzenreiter <git@ipfire.org>
To: ipfire-scm@lists.ipfire.org
Subject: [git.ipfire.org] IPFire 2.x development tree branch, next, updated. e698090e7f696923ff146b272b587a3eeca34c6c
Date: Mon, 06 Apr 2020 14:04:11 +0000 [thread overview]
Message-ID: <48wsj76d1zz2xwT@people01.haj.ipfire.org> (raw)
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- Log -----------------------------------------------------------------
commit e698090e7f696923ff146b272b587a3eeca34c6c
Author: Stefan Schantl <stefan.schantl(a)ipfire.org>
Date: Fri Apr 3 16:25:01 2020 +0200
IDS: Dynamically generate and import the HTTP ports.
With this commit suricata reads the HTTP port declarations from a newly
introduced external file
(/var/ipfire/suricata/suricata-http-ports.yaml).
This file dynamically will be generated. HTTP ports always are the
default port "80" and "81" for update Accelerator and HTTP access to the
WUI. In case the Web-proxy is used, the configured proxy port and/or Transparent
Proxy port also will be declared as a HTTP port and written to that file.
In case one of the proxy ports will be changed, the HTTP port file will
be re-generated and suricate restarted if launched. Also if an old
backup with snort will be restored the convert script handles the
generation of the HTTP ports file.
Finally the suricata-generate-http-ports-file as a tiny script which
simply generates the http ports file and needs to be launched during the
installation of a core update. (The script will no be required
anymore, so it could be deleted afterwards.)
Fixes #12308.
Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f(a)ipfire.org>
commit 6084e66e70bc5a8f598029b075eeda1fc842fa00
Author: Stefan Schantl <stefan.schantl(a)ipfire.org>
Date: Sun Apr 5 13:03:24 2020 +0200
suricata.yaml: Re-add EVE log section.
Hopefully the EVE log will display some more content when trying to
debug suricata events and rules.
Fixes #12315.
Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
Acked-by: Michael Tremer <michael.tremer(a)ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f(a)ipfire.org>
commit 1622e5c1f3781f1b6e370cb540ecabe17383acad
Author: Stefan Schantl <stefan.schantl(a)ipfire.org>
Date: Mon Apr 6 14:34:21 2020 +0200
ids.cgi: Fix logic if suricata needs to be restarted.
Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f(a)ipfire.org>
-----------------------------------------------------------------------
Summary of changes:
config/cfgroot/ids-functions.pl | 51 +++++
config/suricata/convert-snort | 18 +-
...sids-file => suricata-generate-http-ports-file} | 27 +--
config/suricata/suricata.yaml | 213 ++++++++++++++++++++-
html/cgi-bin/ids.cgi | 17 +-
html/cgi-bin/proxy.cgi | 36 +++-
6 files changed, 329 insertions(+), 33 deletions(-)
copy config/suricata/{convert-ids-modifysids-file => suricata-generate-http-ports-file} (73%)
Difference in files:
diff --git a/config/cfgroot/ids-functions.pl b/config/cfgroot/ids-functions.pl
index 7a2d98f03..f124b12be 100644
--- a/config/cfgroot/ids-functions.pl
+++ b/config/cfgroot/ids-functions.pl
@@ -37,6 +37,9 @@ our $homenet_file = "$settingsdir/suricata-homenet.yaml";
# File where the addresses of the used DNS servers are stored.
our $dns_servers_file = "$settingsdir/suricata-dns-servers.yaml";
+# File where the HTTP ports definition is stored.
+our $http_ports_file = "$settingsdir/suricata-http-ports.yaml";
+
# File which contains the enabled sids.
our $enabled_sids_file = "$settingsdir/oinkmaster-enabled-sids.conf";
@@ -89,6 +92,10 @@ my @suricatactrl_cmds = ( 'start', 'stop', 'restart', 'reload', 'fix-rules-dir',
# Array with supported cron intervals.
my @cron_intervals = ('off', 'daily', 'weekly' );
+# Array which contains the HTTP ports, which statically will be declared as HTTP_PORTS in the
+# http_ports_file.
+my @http_ports = ('80', '81');
+
#
## Function to check and create all IDS related files, if the does not exist.
#
@@ -753,6 +760,50 @@ sub generate_dns_servers_file() {
close(FILE);
}
+#
+# Function to generate and write the file which contains the HTTP_PORTS definition.
+#
+sub generate_http_ports_file() {
+ my %proxysettings;
+
+ # Read-in proxy settings
+ &General::readhash("${General::swroot}/proxy/advanced/settings", \%proxysettings);
+
+ # Check if the proxy is enabled.
+ if (( -e "${General::swroot}/proxy/enable") || (-e "${General::swroot}/proxy/enable_blue")) {
+ # Add the proxy port to the array of HTTP ports.
+ push(@http_ports, $proxysettings{'PROXY_PORT'});
+ }
+
+ # Check if the transparent mode of the proxy is enabled.
+ if ((-e "${General::swroot}/proxy/transparent") || (-e "${General::swroot}/proxy/transparent_blue")) {
+ # Add the transparent proxy port to the array of HTTP ports.
+ push(@http_ports, $proxysettings{'TRANSPARENT_PORT'});
+ }
+
+ # Format HTTP_PORTS declaration.
+ my $line = "";
+
+ # Generate line which will be written to the http ports file.
+ $line = join(",", @http_ports);
+
+ # Open file to store the HTTP_PORTS.
+ open(FILE, ">$http_ports_file") or die "Could not open $http_ports_file. $!\n";
+
+ # Print yaml header.
+ print FILE "%YAML 1.1\n";
+ print FILE "---\n\n";
+
+ # Print notice about autogenerated file.
+ print FILE "#Autogenerated file. Any custom changes will be overwritten!\n";
+
+ # Print the generated HTTP_PORTS declaration to the file.
+ print FILE "HTTP_PORTS:\t\"[$line]\"\n";
+
+ # Close file handle.
+ close(FILE);
+}
+
#
## Function to generate and write the file for used rulefiles.
#
diff --git a/config/suricata/convert-snort b/config/suricata/convert-snort
index ee52548e9..3e938137e 100644
--- a/config/suricata/convert-snort
+++ b/config/suricata/convert-snort
@@ -2,7 +2,7 @@
###############################################################################
# #
# IPFire.org - A linux based firewall #
-# Copyright (C) 2019 IPFire Development Team <info(a)ipfire.org> #
+# Copyright (C) 2020 IPFire Development Team <info(a)ipfire.org> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
@@ -298,7 +298,17 @@ if (-f $IDS::rulestarball) {
&IDS::set_ownership("$IDS::dns_servers_file");
#
-## Step 11: Setup automatic ruleset updates.
+## Step 11: Generate file which contains the HTTP ports.
+#
+
+# Call subfunction to generate the file.
+&IDS::generate_http_ports_file();
+
+# Set correct ownership for the http_ports_file.
+&IDS::set_ownership("$IDS::http_ports_file");
+
+#
+## Step 12: Setup automatic ruleset updates.
#
# Check if a ruleset is configured.
@@ -308,7 +318,7 @@ if($rulessettings{"RULES"}) {
}
#
-## Step 12: Grab used ruleset files from snort config file and convert
+## Step 13: Grab used ruleset files from snort config file and convert
## them into the new format.
#
@@ -354,7 +364,7 @@ close(SNORTCONF);
&IDS::write_used_rulefiles_file(@enabled_rule_files);
#
-## Step 13: Start the IDS if enabled.
+## Step 14: Start the IDS if enabled.
#
# Check if the IDS should be started.
diff --git a/config/suricata/suricata-generate-http-ports-file b/config/suricata/suricata-generate-http-ports-file
new file mode 100644
index 000000000..f0d6bb823
--- /dev/null
+++ b/config/suricata/suricata-generate-http-ports-file
@@ -0,0 +1,47 @@
+#!/usr/bin/perl
+###############################################################################
+# #
+# IPFire.org - A linux based firewall #
+# Copyright (C) 2012 IPFire Development Team <info(a)ipfire.org> #
+# #
+# This program is free software: you can redistribute it and/or modify #
+# it under the terms of the GNU General Public License as published by #
+# the Free Software Foundation, either version 3 of the License, or #
+# (at your option) any later version. #
+# #
+# This program is distributed in the hope that it will be useful, #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
+# GNU General Public License for more details. #
+# #
+# You should have received a copy of the GNU General Public License #
+# along with this program. If not, see <http://www.gnu.org/licenses/>. #
+# #
+###############################################################################
+
+use strict;
+
+require '/var/ipfire/general-functions.pl';
+require "${General::swroot}/ids-functions.pl";
+
+exit unless(-f $IDS::ids_settings_file and -f $IDS::rules_settings_file);
+
+#
+## Step 1: Generate and write the HTTP ports file.
+#
+
+# Call subfunction to generate the HTTP ports file.
+&IDS::generate_http_ports_file();
+
+# Set correct ownership.
+&IDS::set_ownership("$IDS::http_ports_file");
+
+#
+## Step 2: Restart suricata if necessary.
+#
+
+# Check if the IDS should be started.
+if(&IDS::ids_is_running()) {
+ # Call suricatactrl and reload the rules.
+ &IDS::call_suricatactrl("restart");
+}
diff --git a/config/suricata/suricata.yaml b/config/suricata/suricata.yaml
index 54016a887..1f33ea0f3 100644
--- a/config/suricata/suricata.yaml
+++ b/config/suricata/suricata.yaml
@@ -30,7 +30,9 @@ vars:
ENIP_SERVER: "$HOME_NET"
port-groups:
- HTTP_PORTS: "[80,81]"
+ # Incluse HTTP_PORTS declaration from external file.
+ include: /var/ipfire/suricata/suricata-http-ports.yaml
+
SHELLCODE_PORTS: "!80"
ORACLE_PORTS: 1521
SSH_PORTS: "[22,222]"
@@ -90,6 +92,215 @@ outputs:
threads: no # per thread stats
#null-values: yes # print counters that have value 0
+ # Extensible Event Format (nicknamed EVE) event log in JSON format
+ - eve-log:
+ enabled: no
+ filetype: regular #regular|syslog|unix_dgram|unix_stream|redis
+ filename: eve.json
+ #prefix: "@cee: " # prefix to prepend to each log entry
+ # the following are valid when type: syslog above
+ #identity: "suricata"
+ #facility: local5
+ #level: Info ## possible levels: Emergency, Alert, Critical,
+ ## Error, Warning, Notice, Info, Debug
+ #redis:
+ # server: 127.0.0.1
+ # port: 6379
+ # async: true ## if redis replies are read asynchronously
+ # mode: list ## possible values: list|lpush (default), rpush, channel|publish
+ # ## lpush and rpush are using a Redis list. "list" is an alias for lpush
+ # ## publish is using a Redis channel. "channel" is an alias for publish
+ # key: suricata ## key or channel to use (default to suricata)
+ # Redis pipelining set up. This will enable to only do a query every
+ # 'batch-size' events. This should lower the latency induced by network
+ # connection at the cost of some memory. There is no flushing implemented
+ # so this setting as to be reserved to high traffic suricata.
+ # pipelining:
+ # enabled: yes ## set enable to yes to enable query pipelining
+ # batch-size: 10 ## number of entry to keep in buffer
+
+ # Include top level metadata. Default yes.
+ #metadata: no
+
+ # include the name of the input pcap file in pcap file processing mode
+ pcap-file: false
+
+ # Community Flow ID
+ # Adds a 'community_id' field to EVE records. These are meant to give
+ # a records a predictable flow id that can be used to match records to
+ # output of other tools such as Bro.
+ #
+ # Takes a 'seed' that needs to be same across sensors and tools
+ # to make the id less predictable.
+
+ # enable/disable the community id feature.
+ community-id: false
+ # Seed value for the ID output. Valid values are 0-65535.
+ community-id-seed: 0
+
+ # HTTP X-Forwarded-For support by adding an extra field or overwriting
+ # the source or destination IP address (depending on flow direction)
+ # with the one reported in the X-Forwarded-For HTTP header. This is
+ # helpful when reviewing alerts for traffic that is being reverse
+ # or forward proxied.
+ xff:
+ enabled: no
+ # Two operation modes are available, "extra-data" and "overwrite".
+ mode: extra-data
+ # Two proxy deployments are supported, "reverse" and "forward". In
+ # a "reverse" deployment the IP address used is the last one, in a
+ # "forward" deployment the first IP address is used.
+ deployment: reverse
+ # Header name where the actual IP address will be reported, if more
+ # than one IP address is present, the last IP address will be the
+ # one taken into consideration.
+ header: X-Forwarded-For
+
+ types:
+ - alert:
+ # payload: yes # enable dumping payload in Base64
+ # payload-buffer-size: 4kb # max size of payload buffer to output in eve-log
+ # payload-printable: yes # enable dumping payload in printable (lossy) format
+ # packet: yes # enable dumping of packet (without stream segments)
+ # metadata: no # enable inclusion of app layer metadata with alert. Default yes
+ # http-body: yes # Requires metadata; enable dumping of http body in Base64
+ # http-body-printable: yes # Requires metadata; enable dumping of http body in printable format
+
+ # Enable the logging of tagged packets for rules using the
+ # "tag" keyword.
+ tagged-packets: yes
+ - anomaly:
+ # Anomaly log records describe unexpected conditions such
+ # as truncated packets, packets with invalid IP/UDP/TCP
+ # length values, and other events that render the packet
+ # invalid for further processing or describe unexpected
+ # behavior on an established stream. Networks which
+ # experience high occurrences of anomalies may experience
+ # packet processing degradation.
+ #
+ # Anomalies are reported for the following:
+ # 1. Decode: Values and conditions that are detected while
+ # decoding individual packets. This includes invalid or
+ # unexpected values for low-level protocol lengths as well
+ # as stream related events (TCP 3-way handshake issues,
+ # unexpected sequence number, etc).
+ # 2. Stream: This includes stream related events (TCP
+ # 3-way handshake issues, unexpected sequence number,
+ # etc).
+ # 3. Application layer: These denote application layer
+ # specific conditions that are unexpected, invalid or are
+ # unexpected given the application monitoring state.
+ #
+ # By default, anomaly logging is disabled. When anomaly
+ # logging is enabled, applayer anomaly reporting is
+ # enabled.
+ enabled: yes
+ #
+ # Choose one or more types of anomaly logging and whether to enable
+ # logging of the packet header for packet anomalies.
+ types:
+ # decode: no
+ # stream: no
+ # applayer: yes
+ #packethdr: no
+ - http:
+ extended: yes # enable this for extended logging information
+ # custom allows additional http fields to be included in eve-log
+ # the example below adds three additional fields when uncommented
+ #custom: [Accept-Encoding, Accept-Language, Authorization]
+ # set this value to one and only one among {both, request, response}
+ # to dump all http headers for every http request and/or response
+ # dump-all-headers: none
+ - dns:
+ # This configuration uses the new DNS logging format,
+ # the old configuration is still available:
+ # https://suricata.readthedocs.io/en/latest/output/eve/eve-json-output.html#dns-v1-format
+
+ # As of Suricata 5.0, version 2 of the eve dns output
+ # format is the default.
+ #version: 2
+
+ # Enable/disable this logger. Default: enabled.
+ #enabled: yes
+
+ # Control logging of requests and responses:
+ # - requests: enable logging of DNS queries
+ # - responses: enable logging of DNS answers
+ # By default both requests and responses are logged.
+ #requests: no
+ #responses: no
+
+ # Format of answer logging:
+ # - detailed: array item per answer
+ # - grouped: answers aggregated by type
+ # Default: all
+ #formats: [detailed, grouped]
+
+ # Types to log, based on the query type.
+ # Default: all.
+ #types: [a, aaaa, cname, mx, ns, ptr, txt]
+ - tls:
+ extended: yes # enable this for extended logging information
+ # output TLS transaction where the session is resumed using a
+ # session id
+ #session-resumption: no
+ # custom allows to control which tls fields that are included
+ # in eve-log
+ #custom: [subject, issuer, session_resumed, serial, fingerprint, sni, version, not_before, not_after, certificate, chain, ja3, ja3s]
+ - files:
+ force-magic: no # force logging magic on all logged files
+ # force logging of checksums, available hash functions are md5,
+ # sha1 and sha256
+ #force-hash: [md5]
+ #- drop:
+ # alerts: yes # log alerts that caused drops
+ # flows: all # start or all: 'start' logs only a single drop
+ # # per flow direction. All logs each dropped pkt.
+ - smtp:
+ #extended: yes # enable this for extended logging information
+ # this includes: bcc, message-id, subject, x_mailer, user-agent
+ # custom fields logging from the list:
+ # reply-to, bcc, message-id, subject, x-mailer, user-agent, received,
+ # x-originating-ip, in-reply-to, references, importance, priority,
+ # sensitivity, organization, content-md5, date
+ #custom: [received, x-mailer, x-originating-ip, relays, reply-to, bcc]
+ # output md5 of fields: body, subject
+ # for the body you need to set app-layer.protocols.smtp.mime.body-md5
+ # to yes
+ #md5: [body, subject]
+
+ #- dnp3
+ - ftp
+ #- rdp
+ - nfs
+ - smb
+ - tftp
+ - ikev2
+ - krb5
+ - snmp
+ #- sip
+ - dhcp:
+ enabled: yes
+ # When extended mode is on, all DHCP messages are logged
+ # with full detail. When extended mode is off (the
+ # default), just enough information to map a MAC address
+ # to an IP address is logged.
+ extended: no
+ - ssh
+ - stats:
+ totals: yes # stats for all threads merged together
+ threads: no # per thread stats
+ deltas: no # include delta values
+ # bi-directional flows
+ - flow
+ # uni-directional flows
+ #- netflow
+
+ # Metadata event type. Triggered whenever a pktvar is saved
+ # and will include the pktvars, flowvars, flowbits and
+ # flowints.
+ #- metadata
+
logging:
# The default log level, can be overridden in an output section.
# Note that debug level logging will only be emitted if Suricata was
diff --git a/html/cgi-bin/ids.cgi b/html/cgi-bin/ids.cgi
index c3e5eefdb..bc31a341f 100644
--- a/html/cgi-bin/ids.cgi
+++ b/html/cgi-bin/ids.cgi
@@ -2,7 +2,7 @@
###############################################################################
# #
# IPFire.org - A linux based firewall #
-# Copyright (C) 2007-2018 IPFire Team <info(a)ipfire.org> #
+# Copyright (C) 2007-2020 IPFire Team <info(a)ipfire.org> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
@@ -417,17 +417,17 @@ if ($cgiparams{'RULESET'} eq $Lang::tr{'save'}) {
# Loop through the hash of idsrules.
foreach my $rulefile(keys %idsrules) {
+ # Check if the state of the rulefile has been changed.
+ unless ($cgiparams{$rulefile} eq $idsrules{$rulefile}{'Rulefile'}{'State'}) {
+ # A restart of suricata is required to apply the changes of the used rulefiles.
+ $suricata_restart_required = 1;
+ }
+
# Check if the rulefile is enabled.
if ($cgiparams{$rulefile} eq "on") {
# Add rulefile to the array of enabled rulefiles.
push(@enabled_rulefiles, $rulefile);
- # Check if the state of the rulefile has been changed.
- unless ($cgiparams{$rulefile} eq $idsrules{$rulefile}{'Rulefile'}{'State'}) {
- # A restart of suricata is required to apply the changes of the used rulefiles.
- $suricata_restart_required = 1;
- }
-
# Drop item from cgiparams hash.
delete $cgiparams{$rulefile};
}
@@ -625,6 +625,9 @@ if ($cgiparams{'RULESET'} eq $Lang::tr{'save'}) {
# Generate file to the store the DNS servers.
&IDS::generate_dns_servers_file();
+ # Generate file to store the HTTP ports.
+ &IDS::generate_http_ports_file();
+
# Write the modify sid's file and pass the taken ruleaction.
&IDS::write_modify_sids_file();
diff --git a/html/cgi-bin/proxy.cgi b/html/cgi-bin/proxy.cgi
index 06aca579b..73646a5ae 100644
--- a/html/cgi-bin/proxy.cgi
+++ b/html/cgi-bin/proxy.cgi
@@ -2,7 +2,7 @@
###############################################################################
# #
# IPFire.org - A linux based firewall #
-# Copyright (C) 2007-2013 IPFire Team <info(a)ipfire.org> #
+# Copyright (C) 2007-2020 IPFire Team <info(a)ipfire.org> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
@@ -37,6 +37,8 @@ require '/var/ipfire/general-functions.pl';
require "${General::swroot}/lang.pl";
require "${General::swroot}/header.pl";
+require "${General::swroot}/ids-functions.pl";
+
my @squidversion = `/usr/sbin/squid -v`;
my $http_port='81';
my $https_port='444';
@@ -550,6 +552,29 @@ ERROR:
if ($proxysettings{'VALID'} eq 'yes')
{
+ # Determine if suricata may needs to be restarted.
+ my $suricata_proxy_ports_changed;
+
+ # Check if the IDS is running
+ if(&IDS::ids_is_running()) {
+ my %oldproxysettings;
+
+ # Read-in current proxy settings and store them as oldsettings hash.
+ &General::readhash("${General::swroot}/proxy/advanced/settings", \%oldproxysettings);
+
+ # Check if the proxy port has been changed.
+ unless ($proxysettings{'PROXY_PORT'} eq $oldproxysettings{'PROXY_PORT'}) {
+ # Port has changed, suricata needs to be adjusted.
+ $suricata_proxy_ports_changed = 1;
+ }
+
+ # Check if the transparent port has been changed.
+ unless ($proxysettings{'TRANSPARENT_PORT'} eq $oldproxysettings{'TRANSPARENT_PORT'}) {
+ # Transparent port has changed, suricata needs to be adjusted.
+ $suricata_proxy_ports_changed = 1;
+ }
+ }
+
&write_acls;
delete $proxysettings{'SRC_SUBNETS'};
@@ -627,6 +652,15 @@ ERROR:
if ($proxysettings{'ACTION'} eq $Lang::tr{'advproxy save and restart'}) { system('/usr/local/bin/squidctrl restart >/dev/null 2>&1'); }
if ($proxysettings{'ACTION'} eq $Lang::tr{'proxy reconfigure'}) { system('/usr/local/bin/squidctrl reconfigure >/dev/null 2>&1'); }
+
+ # Check if the suricata_proxy_ports_changed flag has been set.
+ if ($suricata_proxy_ports_changed) {
+ # Re-generate HTTP ports file.
+ &IDS::generate_http_ports_file();
+
+ # Restart suricata.
+ &IDS::call_suricatactrl("restart");
+ }
}
}
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