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<?php
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/*
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* snort_check_for_rule_updates.php
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*
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* Copyright (C) 2006 Scott Ullrich
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* Copyright (C) 2009 Robert Zelaya
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* Copyright (C) 2011-2012 Ermal Luci
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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require_once("functions.inc");
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require_once("service-utils.inc");
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require_once("/usr/local/pkg/snort/snort.inc");
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global $snort_gui_include;
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$snortdir = SNORTDIR;
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if (!isset($snort_gui_include))
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$pkg_interface = "console";
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$tmpfname = "{$snortdir}/tmp/snort_rules_up";
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$snort_filename_md5 = "{$snort_rules_file}.md5";
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$snort_filename = "{$snort_rules_file}";
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$emergingthreats_filename_md5 = "emerging.rules.tar.gz.md5";
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$emergingthreats_filename = "emerging.rules.tar.gz";
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/* define checks */
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$oinkid = $config['installedpackages']['snortglobal']['oinkmastercode'];
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$snortdownload = $config['installedpackages']['snortglobal']['snortdownload'];
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$emergingthreats = $config['installedpackages']['snortglobal']['emergingthreats'];
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$vrt_enabled = $config['installedpackages']['snortglobal']['snortdownload'];
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$et_enabled = $config['installedpackages']['snortglobal']['emergingthreats'];
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/* Start of code */
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conf_mount_rw();
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if (!is_dir($tmpfname))
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exec("/bin/mkdir -p {$tmpfname}");
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/* Set user agent to Mozilla */
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ini_set('user_agent','Mozilla/4.0 (compatible; MSIE 6.0)');
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ini_set("memory_limit","150M");
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/* remove old $tmpfname files */
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if (is_dir("{$tmpfname}"))
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exec("/bin/rm -r {$tmpfname}");
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/* Make sure snortdir exits */
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exec("/bin/mkdir -p {$snortdir}/rules");
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exec("/bin/mkdir -p {$snortdir}/signatures");
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exec("/bin/mkdir -p {$tmpfname}");
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exec("/bin/mkdir -p /usr/local/lib/snort/dynamicrules");
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/* download md5 sig from snort.org */
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if ($snortdownload == 'on') {
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update_status(gettext("Downloading snort.org md5 file..."));
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$max_tries = 4;
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while ($max_tries > 0) {
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$image = @file_get_contents("http://www.snort.org/pub-bin/oinkmaster.cgi/{$oinkid}/{$snort_filename_md5}");
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if (false === $image) {
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$max_tries--;
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if ($max_tries > 0)
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sleep(30);
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continue;
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} else
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break;
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}
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log_error("Snort MD5 Attempts: " . (4 - $max_tries + 1));
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@file_put_contents("{$tmpfname}/{$snort_filename_md5}", $image);
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if (0 == filesize("{$tmpfname}/{$snort_filename_md5}")) {
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update_status(gettext("Please wait... You may only check for New Rules every 15 minutes..."));
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log_error(gettext("Please wait... You may only check for New Rules every 15 minutes..."));
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update_output_window(gettext("Rules are released every month from snort.org. You may download the Rules at any time."));
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$snortdownload = 'off';
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} else
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update_status(gettext("Done downloading snort.org md5"));
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}
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/* Check if were up to date snort.org */
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if ($snortdownload == 'on') {
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if (file_exists("{$snortdir}/{$snort_filename_md5}")) {
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$md5_check_new = file_get_contents("{$tmpfname}/{$snort_filename_md5}");
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$md5_check_old = file_get_contents("{$snortdir}/{$snort_filename_md5}");
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if ($md5_check_new == $md5_check_old) {
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update_status(gettext("Snort rules are up to date..."));
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log_error("Snort rules are up to date...");
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$snortdownload = 'off';
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}
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}
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}
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/* download snortrules file */
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if ($snortdownload == 'on') {
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update_status(gettext("There is a new set of Snort.org rules posted. Downloading..."));
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log_error(gettext("There is a new set of Snort.org rules posted. Downloading..."));
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$max_tries = 4;
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while ($max_tries > 0) {
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download_file_with_progress_bar("http://www.snort.org/pub-bin/oinkmaster.cgi/{$oinkid}/{$snort_filename}", "{$tmpfname}/{$snort_filename}");
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if (300000 > filesize("{$tmpfname}/$snort_filename")){
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$max_tries--;
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if ($max_tries > 0)
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sleep(30);
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continue;
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} else
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break;
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}
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update_status(gettext("Done downloading rules file."));
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log_error("Snort Rules Attempts: " . (4 - $max_tries + 1));
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if (300000 > filesize("{$tmpfname}/$snort_filename")){
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update_output_window(gettext("Snort rules file download failed..."));
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log_error(gettext("Snort rules file download failed..."));
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log_error("Failed Rules Filesize: " . filesize("{$tmpfname}/$snort_filename"));
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$snortdownload = 'off';
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}
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}
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/* download md5 sig from emergingthreats.net */
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if ($emergingthreats == 'on') {
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update_status(gettext("Downloading emergingthreats md5 file..."));
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$image = @file_get_contents("http://rules.emergingthreats.net/open/snort-{$emerging_threats_version}/emerging.rules.tar.gz.md5");
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/* XXX: error checking */
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@file_put_contents("{$tmpfname}/{$emergingthreats_filename_md5}", $image);
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update_status(gettext("Done downloading emergingthreats md5"));
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if (file_exists("{$snortdir}/{$emergingthreats_filename_md5}")) {
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/* Check if were up to date emergingthreats.net */
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$emerg_md5_check_new = file_get_contents("{$tmpfname}/{$emergingthreats_filename_md5}");
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$emerg_md5_check_old = file_get_contents("{$snortdir}/{$emergingthreats_filename_md5}");
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if ($emerg_md5_check_new == $emerg_md5_check_old) {
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update_status(gettext("Emerging threat rules are up to date..."));
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log_error(gettext("Emerging threat rules are up to date..."));
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$emergingthreats = 'off';
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}
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}
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}
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/* download emergingthreats rules file */
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if ($emergingthreats == "on") {
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update_status(gettext("There is a new set of Emergingthreats rules posted. Downloading..."));
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log_error(gettext("There is a new set of Emergingthreats rules posted. Downloading..."));
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download_file_with_progress_bar("http://rules.emergingthreats.net/open/snort-{$emerging_threats_version}/emerging.rules.tar.gz", "{$tmpfname}/{$emergingthreats_filename}");
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update_status(gettext('Done downloading Emergingthreats rules file.'));
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log_error("Emergingthreats rules file update downloaded succsesfully");
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}
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/* Normalize rulesets */
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$sedcmd = "s/^#alert/# alert/g\n";
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$sedcmd .= "s/^##alert/# alert/g\n";
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$sedcmd .= "s/^#[ \\t#]*alert/# alert/g\n";
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$sedcmd .= "s/^##\\talert/# alert/g\n";
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$sedcmd .= "s/^\\talert/alert/g\n";
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$sedcmd .= "s/^[ \\t]*alert/alert/g\n";
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@file_put_contents("{$snortdir}/tmp/sedcmd", $sedcmd);
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/* Untar emergingthreats rules to tmp */
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if ($emergingthreats == 'on') {
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safe_mkdir("{$snortdir}/tmp/emerging");
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if (file_exists("{$tmpfname}/{$emergingthreats_filename}")) {
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update_status(gettext("Extracting EmergingThreats.org rules..."));
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exec("/usr/bin/tar xzf {$tmpfname}/{$emergingthreats_filename} -C {$snortdir}/tmp/emerging rules/");
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$files = glob("{$snortdir}/tmp/emerging/rules/*.rules");
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foreach ($files as $file) {
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$newfile = basename($file);
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@copy($file, "{$snortdir}/rules/{$newfile}");
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}
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/* IP lists for Emerging Threats rules */
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$files = glob("{$snortdir}/tmp/emerging/rules/*.txt");
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foreach ($files as $file) {
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$newfile = basename($file);
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@copy($file, "{$snortdir}/rules/{$newfile}");
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}
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/* base etc files for Emerging Threats rules */
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foreach (array("classification.config", "reference.config", "gen-msg.map", "unicode.map") as $file) {
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if (file_exists("{$snortdir}/tmp/emerging/rules/{$file}"))
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@copy("{$snortdir}/tmp/emerging/rules/{$file}", "{$snortdir}/ET_{$file}");
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}
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/* make sure default rules are in the right format */
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exec("/usr/bin/sed -I '' -f {$snortdir}/tmp/sedcmd {$snortdir}/rules/emerging*.rules");
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/* Copy emergingthreats md5 sig to snort dir */
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if (file_exists("{$tmpfname}/$emergingthreats_filename_md5")) {
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update_status(gettext("Copying md5 sig to snort directory..."));
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@copy("{$tmpfname}/$emergingthreats_filename_md5", "{$snortdir}/$emergingthreats_filename_md5");
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}
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update_status(gettext("Extraction of EmergingThreats.org rules completed..."));
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}
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}
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/* Untar snort rules file individually to help people with low system specs */
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if ($snortdownload == 'on') {
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if (file_exists("{$tmpfname}/{$snort_filename}")) {
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if ($pfsense_stable == 'yes')
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$freebsd_version_so = 'FreeBSD-7-2';
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else
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$freebsd_version_so = 'FreeBSD-8-1';
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update_status(gettext("Extracting Snort VRT rules..."));
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/* extract snort.org rules and add prefix to all snort.org files*/
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safe_mkdir("{$snortdir}/tmp/snortrules");
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir}/tmp/snortrules rules/");
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$files = glob("{$snortdir}/tmp/snortrules/rules/*.rules");
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foreach ($files as $file) {
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$newfile = basename($file);
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@copy($file, "{$snortdir}/rules/snort_{$newfile}");
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}
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/* IP lists */
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$files = glob("{$snortdir}/tmp/snortrules/rules/*.txt");
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foreach ($files as $file) {
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$newfile = basename($file);
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@copy($file, "{$snortdir}/rules/{$newfile}");
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}
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exec("rm -r {$snortdir}/tmp/snortrules");
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/* extract so rules */
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update_status(gettext("Extracting Snort VRT Shared Objects rules..."));
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exec('/bin/mkdir -p /usr/local/lib/snort/dynamicrules/');
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$snort_arch = php_uname("m");
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$nosorules = false;
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if ($snort_arch == 'i386'){
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir}/tmp so_rules/precompiled/$freebsd_version_so/i386/{$snort_version}/");
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exec("/bin/cp {$snortdir}/tmp/so_rules/precompiled/$freebsd_version_so/i386/{$snort_version}/* /usr/local/lib/snort/dynamicrules/");
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} else if ($snort_arch == 'amd64') {
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir}/tmp so_rules/precompiled/$freebsd_version_so/x86-64/{$snort_version}/");
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exec("/bin/cp {$snortdir}/tmp/so_rules/precompiled/$freebsd_version_so/x86-64/{$snort_version}/* /usr/local/lib/snort/dynamicrules/");
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} else
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$nosorules = true;
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exec("rm -r {$snortdir}/tmp/so_rules");
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252
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if ($nosorules == false) {
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/* extract so rules none bin and rename */
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update_status(gettext("Copying Snort VRT Shared Objects rules..."));
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir}/tmp so_rules/");
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$files = glob("{$snortdir}/tmp/so_rules/*.rules");
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foreach ($files as $file) {
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$newfile = basename($file, ".rules");
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@copy($file, "{$snortdir}/rules/snort_{$newfile}.so.rules");
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}
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exec("rm -r {$snortdir}/tmp/so_rules");
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263
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264
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/* extract base etc files */
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265
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update_status(gettext("Extracting Snort VRT base config files..."));
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266
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir}/tmp etc/");
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267
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foreach (array("classification.config", "reference.config", "gen-msg.map", "unicode.map") as $file) {
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if (file_exists("{$snortdir}/tmp/etc/{$file}"))
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@copy("{$snortdir}/tmp/etc/{$file}", "{$snortdir}/VRT_{$file}");
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}
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exec("rm -r {$snortdir}/tmp/etc");
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272
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273
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/* Untar snort signatures */
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$signature_info_chk = $config['installedpackages']['snortglobal']['signatureinfo'];
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275
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if ($premium_url_chk == 'on') {
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276
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update_status(gettext("Extracting Snort VRT Signatures..."));
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277
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir} doc/signatures/");
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278
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update_status(gettext("Done extracting Signatures."));
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279
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280
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if (is_dir("{$snortdir}/doc/signatures")) {
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281
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update_status(gettext("Copying Snort VRT signatures..."));
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exec("/bin/cp -r {$snortdir}/doc/signatures {$snortdir}/signatures");
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283
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update_status(gettext("Done copying signatures."));
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284
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}
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285
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}
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286
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287
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foreach (glob("/usr/local/lib/snort/dynamicrules/*example*") as $file)
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288
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@unlink($file);
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289
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290
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exec("/usr/bin/tar xzf {$tmpfname}/{$snort_filename} -C {$snortdir} preproc_rules/");
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291
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292
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/* make sure default rules are in the right format */
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293
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exec("/usr/bin/sed -I '' -f {$snortdir}/tmp/sedcmd {$snortdir}/rules/snort_*.rules");
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294
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295
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if (file_exists("{$tmpfname}/{$snort_filename_md5}")) {
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296
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update_status(gettext("Copying md5 sig to snort directory..."));
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297
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@copy("{$tmpfname}/$snort_filename_md5", "{$snortdir}/$snort_filename_md5");
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298
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}
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299
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}
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300
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update_status(gettext("Extraction of Snort VRT rules completed..."));
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301
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}
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302
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}
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303
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304
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/* remove old $tmpfname files */
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305
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if (is_dir("{$snortdir}/tmp")) {
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306
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update_status(gettext("Cleaning up after rules extraction..."));
|
|
307
|
exec("/bin/rm -r {$snortdir}/tmp");
|
|
308
|
}
|
|
309
|
|
|
310
|
function build_sid_msg_map($rules_dir, $sid_file) {
|
|
311
|
|
|
312
|
$sidMap = array();
|
|
313
|
|
|
314
|
/* Normalize the supplied rules path to have a trailing */
|
|
315
|
/* slash in the directory name. */
|
|
316
|
$my_rules_dir = ((strrpos($rules_dir, '/') + 1) == strlen($rules_dir)) ? $rules_dir : $rules_dir . "/";
|
|
317
|
|
|
318
|
/* Read the rule files into an array, then iterate the list */
|
|
319
|
foreach (glob($my_rules_dir . "*.rules") as $file) {
|
|
320
|
|
|
321
|
/* Don't process files with "deleted" in the filename */
|
|
322
|
if (preg_match('/deleted/i', $file))
|
|
323
|
continue;
|
|
324
|
|
|
325
|
/* Read the file into an array, skipping empty lines. */
|
|
326
|
$rules_array = file($file, FILE_SKIP_EMPTY_LINES);
|
|
327
|
$record = "";
|
|
328
|
$b_Multiline = false;
|
|
329
|
|
|
330
|
/* Read and process each line from the rules in the */
|
|
331
|
/* current file. */
|
|
332
|
foreach ($rules_array as $rule) {
|
|
333
|
|
|
334
|
/* Skip any non-rule lines unless we're in */
|
|
335
|
/* multiline mode.
|
|
336
|
if (!preg_match('/^\s*#*\s*(alert|drop|pass)/i', $rule) && !$b_Multiline)
|
|
337
|
continue;
|
|
338
|
|
|
339
|
/* Skip disabled rules or comment lines. */
|
|
340
|
if (preg_match('/^\s*#/', $rule))
|
|
341
|
continue;
|
|
342
|
|
|
343
|
/* Test for a multi-line rule, and reassemble the */
|
|
344
|
/* pieces back into a single line. */
|
|
345
|
if (preg_match('/\\\\s*[\n]$/m', $rule)) {
|
|
346
|
$rule = substr($rule, 0, strrpos($rule, '\\'));
|
|
347
|
$record .= $rule;
|
|
348
|
$b_Multiline = true;
|
|
349
|
continue;
|
|
350
|
}
|
|
351
|
/* If the last segment of a multiline rule, then */
|
|
352
|
/* append it onto the previous parts to form a */
|
|
353
|
/* single-line rule for further processing below. */
|
|
354
|
elseif (!preg_match('/\\\\s*[\n]$/m', $rule) && $b_Multiline) {
|
|
355
|
$record .= $rule;
|
|
356
|
$rule = $record;
|
|
357
|
}
|
|
358
|
$b_Multiline = false;
|
|
359
|
$record = "";
|
|
360
|
|
|
361
|
/* Parse the rule to find sid and any references. */
|
|
362
|
$sid = '';
|
|
363
|
$msg = '';
|
|
364
|
$matches = '';
|
|
365
|
$sidEntry = '';
|
|
366
|
if (preg_match('/\bmsg\s*:\s*"(.+?)"\s*;/i', $rule, $matches))
|
|
367
|
$msg = trim($matches[1]);
|
|
368
|
if (preg_match('/\bsid\s*:\s*(\d+)\s*;/i', $rule, $matches))
|
|
369
|
$sid = trim($matches[1]);
|
|
370
|
if (!empty($sid) && !empty($msg)) {
|
|
371
|
$sidEntry = $sid . ' || ' . $msg;
|
|
372
|
preg_match_all('/\breference\s*:\s*([^\;]+)/i', $rule, $matches);
|
|
373
|
foreach ($matches[1] as $ref)
|
|
374
|
$sidEntry .= " || " . trim($ref);
|
|
375
|
$sidEntry .= "\n";
|
|
376
|
$sidMap[$sid] = $sidEntry;
|
|
377
|
}
|
|
378
|
}
|
|
379
|
}
|
|
380
|
/* Sort the generated sid-msg map by sid */
|
|
381
|
ksort($sidMap);
|
|
382
|
|
|
383
|
/* Now print the result to the supplied file */
|
|
384
|
file_put_contents($sid_file, array_values($sidMap));
|
|
385
|
}
|
|
386
|
|
|
387
|
function snort_merge_reference_configs($cfg_in, $cfg_out) {
|
|
388
|
$outMap = array();
|
|
389
|
foreach ($cfg_in as $file) {
|
|
390
|
$in = file($file, FILE_SKIP_EMPTY_LINES);
|
|
391
|
foreach ($in as $line) {
|
|
392
|
/* Skip comment lines */
|
|
393
|
if (preg_match('/^\s*#/', $line))
|
|
394
|
continue;
|
|
395
|
if (preg_match('/(\:)\s*(\w+)\s*(.*)/', $line, $matches)) {
|
|
396
|
if (!empty($matches[2]) && !empty($matches[3])) {
|
|
397
|
$matches[2] = trim($matches[2]);
|
|
398
|
if (!array_key_exists($matches[2], $outMap))
|
|
399
|
$outMap[$matches[2]] = trim($matches[3]);
|
|
400
|
}
|
|
401
|
}
|
|
402
|
}
|
|
403
|
}
|
|
404
|
/* Sort the new reference map. */
|
|
405
|
uksort($outMap,'strnatcasecmp');
|
|
406
|
|
|
407
|
/* Format and write it to the supplied output file. */
|
|
408
|
$format = "config reference: %-12s %s\n";
|
|
409
|
foreach ($outMap as $key=>$value)
|
|
410
|
$outMap[$key] = sprintf($format, $key, $value);
|
|
411
|
file_put_contents($cfg_out, array_values($outMap));
|
|
412
|
}
|
|
413
|
|
|
414
|
function snort_merge_classification_configs($cfg_in, $cfg_out) {
|
|
415
|
$outMap = array();
|
|
416
|
foreach ($cfg_in as $file) {
|
|
417
|
$in = file($file, FILE_SKIP_EMPTY_LINES);
|
|
418
|
foreach ($in as $line) {
|
|
419
|
if (preg_match('/(.*:)(\s*.*),(.*),(.*)/', $line, $matches)) {
|
|
420
|
/* Skip comment lines */
|
|
421
|
if (preg_match('/^\s*#/', $line))
|
|
422
|
continue;
|
|
423
|
if (!empty($matches[2]) && !empty($matches[3]) && !empty($matches[4])) {
|
|
424
|
$matches[2] = trim($matches[2]);
|
|
425
|
if (!array_key_exists($matches[2], $outMap))
|
|
426
|
$outMap[$matches[2]] = trim($matches[3]) . "," . trim($matches[4]);
|
|
427
|
}
|
|
428
|
}
|
|
429
|
}
|
|
430
|
}
|
|
431
|
/* Sort the new classification map. */
|
|
432
|
uksort($outMap,'strnatcasecmp');
|
|
433
|
|
|
434
|
/* Format and write it to the supplied output file. */
|
|
435
|
$format = "config classification: %s,%s\n";
|
|
436
|
foreach ($outMap as $key=>$value)
|
|
437
|
$outMap[$key] = sprintf($format, $key, $value);
|
|
438
|
file_put_contents($cfg_out, array_values($outMap));
|
|
439
|
}
|
|
440
|
|
|
441
|
function snort_apply_customizations($snortcfg, $if_real) {
|
|
442
|
global $snortdir;
|
|
443
|
|
|
444
|
if (empty($snortcfg['rulesets']))
|
|
445
|
return;
|
|
446
|
else {
|
|
447
|
$enabled_rulesets_array = explode("||", $snortcfg['rulesets']);
|
|
448
|
foreach($enabled_rulesets_array as $enabled_item) {
|
|
449
|
@copy("{$snortdir}/rules/{$enabled_item}", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/rules/{$enabled_item}");
|
|
450
|
if (substr($enabled_item, 0, 5) == "snort" && substr($enabled_item, -9) == ".so.rules") {
|
|
451
|
$slib = substr($enabled_item, 6, -6);
|
|
452
|
if (file_exists("/usr/local/lib/snort/dynamicrules/{$slib}"))
|
|
453
|
@copy("/usr/local/lib/snort/dynamicrules/{$slib}", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/dynamicrules/{$slib}");
|
|
454
|
}
|
|
455
|
}
|
|
456
|
|
|
457
|
@copy("{$snortdir}/classification.config", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/classification.config");
|
|
458
|
@copy("{$snortdir}/gen-msg.map", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/gen-msg.map");
|
|
459
|
if (is_dir("{$snortdir}/generators"))
|
|
460
|
exec("/bin/cp -r {$snortdir}/generators {$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}");
|
|
461
|
@copy("{$snortdir}/reference.config", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/reference.config");
|
|
462
|
@copy("{$snortdir}/sid", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/sid");
|
|
463
|
@copy("{$snortdir}/sid-msg.map", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/sid-msg.map");
|
|
464
|
@copy("{$snortdir}/unicode.map", "{$snortdir}/snort_{$snortcfg['uuid']}_{$if_real}/unicode.map");
|
|
465
|
}
|
|
466
|
|
|
467
|
if (!empty($snortcfg['rule_sid_on']) || !empty($snortcfg['rule_sid_off'])) {
|
|
468
|
if (!empty($snortcfg['rule_sid_on'])) {
|
|
469
|
$enabled_sid_on_array = explode("||", trim($snortcfg['rule_sid_on']));
|
|
470
|
$enabled_sids = array_flip($enabled_sid_on_array);
|
|
471
|
}
|
|
472
|
|
|
473
|
if (!empty($snortcfg['rule_sid_off'])) {
|
|
474
|
$enabled_sid_off_array = explode("||", trim($snortcfg['rule_sid_off']));
|
|
475
|
$disabled_sids = array_flip($enabled_sid_off_array);
|
|
476
|
}
|
|
477
|
|
|
478
|
$files = glob("{$snortdir}/snort_{$snortcfg}_{$if_real}/rules/*.rules");
|
|
479
|
foreach ($files as $file) {
|
|
480
|
$splitcontents = file($file);
|
|
481
|
$changed = false;
|
|
482
|
foreach ( $splitcontents as $counter => $value ) {
|
|
483
|
$sid = snort_get_rule_part($value, 'sid:', ';', 0);
|
|
484
|
if (!is_numeric($sid))
|
|
485
|
continue;
|
|
486
|
if (isset($enabled_sids["enablesid {$sid}"])) {
|
|
487
|
if (substr($value, 0, 5) == "alert")
|
|
488
|
/* Rule is already enabled */
|
|
489
|
continue;
|
|
490
|
if (substr($value, 0, 7) == "# alert") {
|
|
491
|
/* Rule is disabled, change */
|
|
492
|
$splitcontents[$counter] = substr($value, 2);
|
|
493
|
$changed = true;
|
|
494
|
} else if (substr($splitcontents[$counter - 1], 0, 5) == "alert") {
|
|
495
|
/* Rule is already enabled */
|
|
496
|
continue;
|
|
497
|
} else if (substr($splitcontents[$counter - 1], 0, 7) == "# alert") {
|
|
498
|
/* Rule is disabled, change */
|
|
499
|
$splitcontents[$counter - 1] = substr($value, 2);
|
|
500
|
$changed = true;
|
|
501
|
}
|
|
502
|
} else if (isset($disabled_sids["disablesid {$sid}"])) {
|
|
503
|
if (substr($value, 0, 7) == "# alert")
|
|
504
|
/* Rule is already disabled */
|
|
505
|
continue;
|
|
506
|
if (substr($value, 0, 5) == "alert") {
|
|
507
|
/* Rule is enabled, change */
|
|
508
|
$splitcontents[$counter] = "# {$value}";
|
|
509
|
$changed = true;
|
|
510
|
} else if (substr($splitcontents[$counter - 1], 0, 7) == "# alert") {
|
|
511
|
/* Rule is already disabled */
|
|
512
|
continue;
|
|
513
|
} else if (substr($splitcontents[$counter - 1], 0, 5) == "alert") {
|
|
514
|
/* Rule is enabled, change */
|
|
515
|
$splitcontents[$counter - 1] = "# {$value}";
|
|
516
|
$changed = true;
|
|
517
|
}
|
|
518
|
|
|
519
|
}
|
|
520
|
}
|
|
521
|
if ($changed == true)
|
|
522
|
@file_put_contents($file, implode("\n", $splitcontents));
|
|
523
|
}
|
|
524
|
}
|
|
525
|
}
|
|
526
|
|
|
527
|
if ($snortdownload == 'on' || $emergingthreats == 'on') {
|
|
528
|
/* Build a new sid-msg.map file from downloaded and enabled rules. */
|
|
529
|
update_status(gettext('Generating new sid-msg map file...'));
|
|
530
|
build_sid_msg_map("{$snortdir}/rules/", "{$snortdir}/sid-msg.map");
|
|
531
|
|
|
532
|
update_status(gettext('Copying new config and map files...'));
|
|
533
|
|
|
534
|
/* Determine which base etc file set to use for the master copy. */
|
|
535
|
/* If the Snort VRT rules are not enabled, then use Emerging Threats. */
|
|
536
|
if (($vrt_enabled == 'off') && (et_enabled == 'on')) {
|
|
537
|
foreach (array("classification.config", "reference.config", "gen-msg.map", "unicode.map") as $file) {
|
|
538
|
if (file_exists("{$snortdir}/ET_{$file}"))
|
|
539
|
@rename("{$snortdir}/ET_{$file}", "{$snortdir}/{$file}");
|
|
540
|
}
|
|
541
|
}
|
|
542
|
elseif (($vrt_enabled == 'on') && ($et_enabled == 'off')) {
|
|
543
|
foreach (array("classification.config", "reference.config", "gen-msg.map", "unicode.map") as $file) {
|
|
544
|
if (file_exists("{$snortdir}/VRT_{$file}"))
|
|
545
|
@rename("{$snortdir}/VRT_{$file}", "{$snortdir}/{$file}");
|
|
546
|
}
|
|
547
|
}
|
|
548
|
else {
|
|
549
|
/* Both VRT and ET rules are enabled, so build combined */
|
|
550
|
/* reference.config and classification.config files. */
|
|
551
|
$cfgs = glob("{$snortdir}/*reference.config");
|
|
552
|
snort_merge_reference_configs($cfgs, "{$snortdir}/reference.config");
|
|
553
|
$cfgs = glob("{$snortdir}/*classification.config");
|
|
554
|
snort_merge_classification_configs($cfgs, "{$snortdir}/classification.config");
|
|
555
|
}
|
|
556
|
|
|
557
|
/* Clean-up our temp versions of the config and map files. */
|
|
558
|
update_status(gettext('Cleaning up temp files...'));
|
|
559
|
$cfgs = glob("{$snortdir}/??*_*.config");
|
|
560
|
foreach ($cfgs as $file) {
|
|
561
|
if (file_exists($file)) {
|
|
562
|
$cmd = "/bin/rm -r " . $file;
|
|
563
|
exec($cmd);
|
|
564
|
}
|
|
565
|
}
|
|
566
|
$cfgs = glob("{$snortdir}/??*_*.map");
|
|
567
|
foreach ($cfgs as $file) {
|
|
568
|
if (file_exists($file)) {
|
|
569
|
$cmd = "/bin/rm -r " . $file;
|
|
570
|
exec($cmd);
|
|
571
|
}
|
|
572
|
}
|
|
573
|
|
|
574
|
/* Start the proccess for each configured interface */
|
|
575
|
if (is_array($config['installedpackages']['snortglobal']['rule'])) {
|
|
576
|
foreach ($config['installedpackages']['snortglobal']['rule'] as $id => $value) {
|
|
577
|
|
|
578
|
/* Create configuration for each active Snort interface */
|
|
579
|
$if_real = snort_get_real_interface($value['interface']);
|
|
580
|
$tmp = "Updating rules configuration for: ";
|
|
581
|
if (!empty($value['descr']))
|
|
582
|
$tmp += $value['descr'];
|
|
583
|
else
|
|
584
|
$tmp += $value['interface'];
|
|
585
|
$tmp += " ...";
|
|
586
|
update_status(gettext($tmp));
|
|
587
|
log_error($tmp);
|
|
588
|
snort_apply_customizations($value, $if_real);
|
|
589
|
}
|
|
590
|
}
|
|
591
|
exec("/bin/sh /usr/local/etc/rc.d/snort.sh restart");
|
|
592
|
sleep(10);
|
|
593
|
if (!is_process_running("snort"))
|
|
594
|
exec("/bin/sh /usr/local/etc/rc.d/snort.sh start");
|
|
595
|
update_output_window(gettext("Snort has restarted with your new set of rules..."));
|
|
596
|
log_error("Snort has restarted with your new set of rules...");
|
|
597
|
}
|
|
598
|
|
|
599
|
update_status(gettext("The Rules update finished..."));
|
|
600
|
log_error("The Rules update finished...");
|
|
601
|
conf_mount_ro();
|
|
602
|
|
|
603
|
?>
|