.
Copyright (C) 2003-2004 Manuel Kasper .
Copyright (C) 2006 Scott Ullrich
All rights reserved.
Modified for the Pfsense snort package v. 1.8+
Copyright (C) 2009 Robert Zelaya Sr. Developer
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
require_once("guiconfig.inc");
require_once("/usr/local/pkg/snort/snort.inc");
/* load only javascript that is needed */
$snort_load_sortabletable = 'yes';
$snort_load_mootools = 'yes';
$snortalertlogt = $config['installedpackages']['snortglobal']['snortalertlogtype'];
if ($_GET['instance'])
$instanceid = $_GET['instance'];
if ($_POST['instance'])
$instanceid = $_POST['instance'];
if (empty($instanceid))
$instanceid = 0;
if (!is_array($config['installedpackages']['snortglobal']['rule']))
$config['installedpackages']['snortglobal']['rule'] = array();
$a_instance = &$config['installedpackages']['snortglobal']['rule'];
$snort_uuid = $a_instance[$instanceid]['uuid'];
$if_real = snort_get_real_interface($a_instance[$instanceid]['interface']);
if (is_array($config['installedpackages']['snortglobal']['alertsblocks'])) {
$pconfig['arefresh'] = $config['installedpackages']['snortglobal']['alertsblocks']['arefresh'];
$pconfig['alertnumber'] = $config['installedpackages']['snortglobal']['alertsblocks']['alertnumber'];
$anentries = $pconfig['alertnumber'];
} else {
$anentries = '250';
$pconfig['alertnumber'] = '250';
$pconfig['arefresh'] = 'off';
}
if ($_POST['save'])
{
if (!is_array($config['installedpackages']['snortglobal']['alertsblocks']))
$config['installedpackages']['snortglobal']['alertsblocks'] = array();
$config['installedpackages']['snortglobal']['alertsblocks']['arefresh'] = $_POST['arefresh'] ? 'on' : 'off';
$config['installedpackages']['snortglobal']['alertsblocks']['alertnumber'] = $_POST['alertnumber'];
write_config();
header("Location: /snort/snort_alerts.php?instance={$instanceid}");
exit;
}
if ($_GET['action'] == "clear" || $_POST['delete']) {
if (file_exists("/var/log/snort/snort_{$if_real}{$snort_uuid}/alert")) {
conf_mount_rw();
snort_post_delete_logs($snort_uuid);
@file_put_contents("/var/log/snort/snort_{$if_real}{$snort_uuid}/alert", "");
/* XXX: This is needed is snort is run as snort user */
//mwexec('/usr/sbin/chown snort:snort /var/log/snort/*', true);
mwexec('/bin/chmod 660 /var/log/snort/*', true);
mwexec("/bin/pkill -HUP -F {$g['varrun_path']}/snort_{$if_real}{$snort_uuid}.pid -a");
conf_mount_ro();
}
header("Location: /snort/snort_alerts.php?instance={$instanceid}");
exit;
}
if ($_POST['download']) {
$save_date = exec('/bin/date "+%Y-%m-%d-%H-%M-%S"');
$file_name = "snort_logs_{$save_date}_{$if_real}.tar.gz";
exec("/usr/bin/tar cfz /tmp/{$file_name} /var/log/snort/snort_{$if_real}{$snort_uuid}");
if (file_exists("/tmp/{$file_name}")) {
$file = "/tmp/snort_logs_{$save_date}.tar.gz";
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT\n");
header("Pragma: private"); // needed for IE
header("Cache-Control: private, must-revalidate"); // needed for IE
header('Content-type: application/force-download');
header('Content-Transfer-Encoding: Binary');
header("Content-length: ".filesize($file));
header("Content-disposition: attachment; filename = {$file_name}");
readfile("$file");
exec("/bin/rm /tmp/{$file_name}");
}
header("Location: /snort/snort_alerts.php?instance={$instanceid}");
exit;
}
/* WARNING: took me forever to figure reg expression, dont lose */
// $fileline = '12/09-18:12:02.086733 [**] [122:6:0] (portscan) TCP Filtered Decoy Portscan [**] [Priority: 3] {PROTO:255} 125.135.214.166 -> 70.61.243.50';
function get_snort_alert_date($fileline)
{
/* date full date \d+\/\d+-\d+:\d+:\d+\.\d+\s */
if (preg_match("/\d+\/\d+-\d+:\d+:\d\d/", $fileline, $matches))
$alert_date = "$matches[0]";
return $alert_date;
}
function get_snort_alert_disc($fileline)
{
/* disc */
if (preg_match("/\[\*\*\] (\[.*\]) (.*) (\[\*\*\])/", $fileline, $matches))
$alert_disc = "$matches[2]";
return $alert_disc;
}
function get_snort_alert_class($fileline)
{
/* class */
if (preg_match('/\[Classification:\s.+[^\d]\]/', $fileline, $matches))
$alert_class = "$matches[0]";
return $alert_class;
}
function get_snort_alert_priority($fileline)
{
/* Priority */
if (preg_match('/Priority:\s\d/', $fileline, $matches))
$alert_priority = "$matches[0]";
return $alert_priority;
}
function get_snort_alert_proto($fileline)
{
/* Priority */
if (preg_match('/\{.+\}/', $fileline, $matches))
$alert_proto = "$matches[0]";
return $alert_proto;
}
function get_snort_alert_proto_full($fileline)
{
/* Protocal full */
if (preg_match('/.+\sTTL/', $fileline, $matches))
$alert_proto_full = "$matches[0]";
return $alert_proto_full;
}
function get_snort_alert_ip_src($fileline)
{
/* SRC IP */
$re1='.*?'; # Non-greedy match on filler
$re2='((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(?![\\d])'; # IPv4 IP Address 1
if (preg_match_all ("/".$re1.$re2."/is", $fileline, $matches))
$alert_ip_src = $matches[1][0];
return $alert_ip_src;
}
function get_snort_alert_src_p($fileline)
{
/* source port */
if (preg_match('/:\d+\s-/', $fileline, $matches))
$alert_src_p = "$matches[0]";
return $alert_src_p;
}
function get_snort_alert_flow($fileline)
{
/* source port */
if (preg_match('/(->|<-)/', $fileline, $matches))
$alert_flow = "$matches[0]";
return $alert_flow;
}
function get_snort_alert_ip_dst($fileline)
{
/* DST IP */
$re1dp='.*?'; # Non-greedy match on filler
$re2dp='(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(?![\\d])'; # Uninteresting: ipaddress
$re3dp='.*?'; # Non-greedy match on filler
$re4dp='((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?))(?![\\d])'; # IPv4 IP Address 1
if (preg_match_all("/".$re1dp.$re2dp.$re3dp.$re4dp."/is", $fileline, $matches))
$alert_ip_dst = $matches[1][0];
return $alert_ip_dst;
}
function get_snort_alert_dst_p($fileline)
{
/* dst port */
if (preg_match('/:\d+$/', $fileline, $matches))
$alert_dst_p = "$matches[0]";
return $alert_dst_p;
}
function get_snort_alert_dst_p_full($fileline)
{
/* dst port full */
if (preg_match('/:\d+\n[A-Z]+\sTTL/', $fileline, $matches))
$alert_dst_p = "$matches[0]";
return $alert_dst_p;
}
function get_snort_alert_sid($fileline)
{
/* SID */
if (preg_match('/\[\d+:\d+:\d+\]/', $fileline, $matches))
$alert_sid = "$matches[0]";
return $alert_sid;
}
$pgtitle = "Services: Snort: Snort Alerts";
include_once("head.inc");
?>
\n";
?>
' . $pgtitle . '
';}?>
# |
PRI |
PROTO |
DESCRIPTION |
CLASS |
SRC |
SPORT |
FLOW |
DST |
DPORT |
SID |
Date |
$fileline) {
if (empty($fileline))
continue;
if ($counter > $anentries)
break;
/* Date */
$alert_date_str = get_snort_alert_date($fileline);
if($alert_date_str != '')
$alert_date = $alert_date_str;
else
$alert_date = 'empty';
/* Discription */
$alert_disc_str = get_snort_alert_disc($fileline);
if(empty($alert_disc_str))
$alert_disc = 'empty';
else
$alert_disc = $alert_disc_str;
/* Classification */
$alert_class_str = get_snort_alert_class($fileline);
if($alert_class_str != '')
{
$alert_class_match = array('[Classification:',']');
$alert_class = str_replace($alert_class_match, '', "$alert_class_str");
}else{
$alert_class = 'Prep';
}
/* Priority */
$alert_priority_str = get_snort_alert_priority($fileline);
if($alert_priority_str != '')
{
$alert_priority_match = array('Priority: ',']');
$alert_priority = str_replace($alert_priority_match, '', "$alert_priority_str");
}else{
$alert_priority = 'empty';
}
/* Protocol */
/* Detect alert file type */
if ($snortalertlogt == 'full')
{
$alert_proto_str = get_snort_alert_proto_full($fileline);
}else{
$alert_proto_str = get_snort_alert_proto($fileline);
}
if($alert_proto_str != '')
{
$alert_proto_match = array(" TTL",'{','}');
$alert_proto = str_replace($alert_proto_match, '', "$alert_proto_str");
}else{
$alert_proto = 'empty';
}
/* IP SRC */
$alert_ip_src_str = get_snort_alert_ip_src($fileline);
if($alert_ip_src_str != '')
{
$alert_ip_src = $alert_ip_src_str;
}else{
$alert_ip_src = 'empty';
}
/* IP SRC Port */
$alert_src_p_str = get_snort_alert_src_p($fileline);
if($alert_src_p_str != '')
{
$alert_src_p_match = array(' -',':');
$alert_src_p = str_replace($alert_src_p_match, '', "$alert_src_p_str");
}else{
$alert_src_p = 'empty';
}
/* Flow */
$alert_flow_str = get_snort_alert_flow($fileline);
if($alert_flow_str != '')
{
$alert_flow = $alert_flow_str;
}else{
$alert_flow = 'empty';
}
/* IP Destination */
$alert_ip_dst_str = get_snort_alert_ip_dst($fileline);
if($alert_ip_dst_str != '')
{
$alert_ip_dst = $alert_ip_dst_str;
}else{
$alert_ip_dst = 'empty';
}
/* IP DST Port */
if ($snortalertlogt == 'full')
{
$alert_dst_p_str = get_snort_alert_dst_p_full($fileline);
}else{
$alert_dst_p_str = get_snort_alert_dst_p($fileline);
}
if($alert_dst_p_str != '')
{
$alert_dst_p_match = array(':',"\n"," TTL");
$alert_dst_p_str2 = str_replace($alert_dst_p_match, '', "$alert_dst_p_str");
$alert_dst_p_match2 = array('/[A-Z]/');
$alert_dst_p = preg_replace($alert_dst_p_match2, '', "$alert_dst_p_str2");
}else{
$alert_dst_p = 'empty';
}
/* SID */
$alert_sid_str = get_snort_alert_sid($fileline);
if($alert_sid_str != '')
{
$alert_sid_match = array('[',']');
$alert_sid = str_replace($alert_sid_match, '', "$alert_sid_str");
}else{
$alert_sid_str = 'empty';
}
/* NOTE: using one echo improves performance by 2x */
echo "
{$counter} |
{$alert_priority} |
{$alert_proto} |
{$alert_disc} |
{$alert_class} |
{$alert_ip_src} |
{$alert_src_p} |
{$alert_flow} |
{$alert_ip_dst} |
{$alert_dst_p} |
{$alert_sid} |
{$alert_date} |
\n";
}
}
?>
|