. * Copyright (C) 2003-2004 Manuel Kasper . * Copyright (C) 2006 Scott Ullrich * Copyright (C) 2009 Robert Zelaya Sr. Developer * Copyright (C) 2012 Ermal Luci * Copyright (C) 2014 Jim Pingle jim@pingle.org * All rights reserved. * * Adapted for Suricata by: * Copyright (C) 2014 Bill Meeks * All rights reserved. * * 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/suricata/suricata.inc"); global $g, $config; $supplist = array(); $suri_pf_table = SURICATA_PF_TABLE; $filterlogentries = FALSE; function suricata_is_alert_globally_suppressed($list, $gid, $sid) { /************************************************/ /* Checks the passed $gid:$sid to see if it has */ /* been globally suppressed. If true, then any */ /* "track by_src" or "track by_dst" options are */ /* disabled since they are overridden by the */ /* global suppression of the $gid:$sid. */ /************************************************/ /* If entry has a child array, then it's by src or dst ip. */ /* So if there is a child array or the keys are not set, */ /* then this gid:sid is not globally suppressed. */ if (is_array($list[$gid][$sid])) return false; elseif (!isset($list[$gid][$sid])) return false; else return true; } function suricata_add_supplist_entry($suppress) { /************************************************/ /* Adds the passed entry to the Suppress List */ /* for the active interface. If a Suppress */ /* List is defined for the interface, it is */ /* used. If no list is defined, a new default */ /* list is created using the interface name. */ /* */ /* On Entry: */ /* $suppress --> suppression entry text */ /* */ /* Returns: */ /* TRUE if successful or FALSE on failure */ /************************************************/ global $config, $a_instance, $instanceid; if (!is_array($config['installedpackages']['suricata']['suppress'])) $config['installedpackages']['suricata']['suppress'] = array(); if (!is_array($config['installedpackages']['suricata']['suppress']['item'])) $config['installedpackages']['suricata']['suppress']['item'] = array(); $a_suppress = &$config['installedpackages']['suricata']['suppress']['item']; $found_list = false; /* If no Suppress List is set for the interface, then create one with the interface name */ if (empty($a_instance[$instanceid]['suppresslistname']) || $a_instance[$instanceid]['suppresslistname'] == 'default') { $s_list = array(); $s_list['uuid'] = uniqid(); $s_list['name'] = $a_instance[$instanceid]['interface'] . "suppress" . "_" . $s_list['uuid']; $s_list['descr'] = "Auto-generated list for Alert suppression"; $s_list['suppresspassthru'] = base64_encode($suppress); $a_suppress[] = $s_list; $a_instance[$instanceid]['suppresslistname'] = $s_list['name']; $found_list = true; } else { /* If we get here, a Suppress List is defined for the interface so see if we can find it */ foreach ($a_suppress as $a_id => $alist) { if ($alist['name'] == $a_instance[$instanceid]['suppresslistname']) { $found_list = true; if (!empty($alist['suppresspassthru'])) { $tmplist = base64_decode($alist['suppresspassthru']); $tmplist .= "\n{$suppress}"; $alist['suppresspassthru'] = base64_encode($tmplist); $a_suppress[$a_id] = $alist; } else { $alist['suppresspassthru'] = base64_encode($suppress); $a_suppress[$a_id] = $alist; } } } } /* If we created a new list or updated an existing one, save the change */ /* and return true; otherwise return false. */ if ($found_list) { write_config(); sync_suricata_package_config(); return true; } else return false; } function suricata_escape_filter_regex($filtertext) { /* If the caller (user) has not already put a backslash before a slash, to escape it in the regex, */ /* then this will do it. Take out any "\/" already there, then turn all ordinary "/" into "\/". */ return str_replace('/', '\/', str_replace('\/', '/', $filtertext)); } function suricata_match_filter_field($flent, $fields) { foreach ($fields as $key => $field) { if ($field == null) continue; if ((strpos($field, '!') === 0)) { $field = substr($field, 1); $field_regex = suricata_escape_filter_regex($field); if (@preg_match("/{$field_regex}/i", $flent[$key])) return false; } else { $field_regex = suricata_escape_filter_regex($field); if (!@preg_match("/{$field_regex}/i", $flent[$key])) return false; } } return true; } if (isset($_POST['instance']) && is_numericint($_POST['instance'])) $instanceid = $_POST['instance']; // This is for the auto-refresh so we can stay on the same interface elseif (isset($_GET['instance']) && is_numericint($_GET['instance'])) $instanceid = $_GET['instance']; if (is_null($instanceid)) $instanceid = 0; if (!is_array($config['installedpackages']['suricata']['rule'])) $config['installedpackages']['suricata']['rule'] = array(); $a_instance = &$config['installedpackages']['suricata']['rule']; $suricata_uuid = $a_instance[$instanceid]['uuid']; $if_real = get_real_interface($a_instance[$instanceid]['interface']); $suricatalogdir = SURICATALOGDIR; // Load up the arrays of force-enabled and force-disabled SIDs $enablesid = suricata_load_sid_mods($a_instance[$instanceid]['rule_sid_on']); $disablesid = suricata_load_sid_mods($a_instance[$instanceid]['rule_sid_off']); $pconfig = array(); if (is_array($config['installedpackages']['suricata']['alertsblocks'])) { $pconfig['arefresh'] = $config['installedpackages']['suricata']['alertsblocks']['arefresh']; $pconfig['alertnumber'] = $config['installedpackages']['suricata']['alertsblocks']['alertnumber']; } if (empty($pconfig['alertnumber'])) $pconfig['alertnumber'] = '250'; if (empty($pconfig['arefresh'])) $pconfig['arefresh'] = 'off'; $anentries = $pconfig['alertnumber']; # --- AJAX REVERSE DNS RESOLVE Start --- if (isset($_POST['resolve'])) { $ip = strtolower($_POST['resolve']); $res = (is_ipaddr($ip) ? gethostbyaddr($ip) : ''); if ($res && $res != $ip) $response = array('resolve_ip' => $ip, 'resolve_text' => $res); else $response = array('resolve_ip' => $ip, 'resolve_text' => gettext("Cannot resolve")); echo json_encode(str_replace("\\","\\\\", $response)); // single escape chars can break JSON decode exit; } # --- AJAX REVERSE DNS RESOLVE End --- if ($_POST['filterlogentries_submit']) { // Set flag for filtering alert entries $filterlogentries = TRUE; // -- IMPORTANT -- // Note the order of these fields must match the order decoded from the alerts log $filterfieldsarray = array(); $filterfieldsarray['time'] = $_POST['filterlogentries_time'] ? $_POST['filterlogentries_time'] : null; $filterfieldsarray['action'] = null; $filterfieldsarray['gid'] = $_POST['filterlogentries_gid'] ? $_POST['filterlogentries_gid'] : null; $filterfieldsarray['sid'] = $_POST['filterlogentries_sid'] ? $_POST['filterlogentries_sid'] : null; $filterfieldsarray['rev'] = null; $filterfieldsarray['msg'] = $_POST['filterlogentries_description'] ? $_POST['filterlogentries_description'] : null; $filterfieldsarray['class'] = $_POST['filterlogentries_classification'] ? $_POST['filterlogentries_classification'] : null; $filterfieldsarray['priority'] = $_POST['filterlogentries_priority'] ? $_POST['filterlogentries_priority'] : null; $filterfieldsarray['proto'] = $_POST['filterlogentries_protocol'] ? $_POST['filterlogentries_protocol'] : null; // Remove any zero-length spaces added to the IP address that could creep in from a copy-paste operation $filterfieldsarray['src'] = $_POST['filterlogentries_sourceipaddress'] ? str_replace("\xE2\x80\x8B", "", $_POST['filterlogentries_sourceipaddress']) : null; $filterfieldsarray['sport'] = $_POST['filterlogentries_sourceport'] ? $_POST['filterlogentries_sourceport'] : null; // Remove any zero-length spaces added to the IP address that could creep in from a copy-paste operation $filterfieldsarray['dst'] = $_POST['filterlogentries_destinationipaddress'] ? str_replace("\xE2\x80\x8B", "", $_POST['filterlogentries_destinationipaddress']) : null; $filterfieldsarray['dport'] = $_POST['filterlogentries_destinationport'] ? $_POST['filterlogentries_destinationport'] : null; } if ($_POST['filterlogentries_clear']) { $filterfieldsarray = array(); $filterlogentries = TRUE; } if ($_POST['save']) { if (!is_array($config['installedpackages']['suricata']['alertsblocks'])) $config['installedpackages']['suricata']['alertsblocks'] = array(); $config['installedpackages']['suricata']['alertsblocks']['arefresh'] = $_POST['arefresh'] ? 'on' : 'off'; $config['installedpackages']['suricata']['alertsblocks']['alertnumber'] = $_POST['alertnumber']; write_config(); header("Location: /suricata/suricata_alerts.php?instance={$instanceid}"); exit; } if ($_POST['unblock'] && $_POST['ip']) { if (is_ipaddr($_POST['ip'])) { exec("/sbin/pfctl -t {$suri_pf_table} -T delete {$_POST['ip']}"); $savemsg = gettext("Host IP address {$_POST['ip']} has been removed from the Blocked Table."); } } if (($_POST['addsuppress_srcip'] || $_POST['addsuppress_dstip'] || $_POST['addsuppress']) && is_numeric($_POST['sidid']) && is_numeric($_POST['gen_id'])) { if ($_POST['addsuppress_srcip']) $method = "by_src"; elseif ($_POST['addsuppress_dstip']) $method = "by_dst"; else $method ="all"; // See which kind of Suppress Entry to create switch ($method) { case "all": if (empty($_POST['descr'])) $suppress = "suppress gen_id {$_POST['gen_id']}, sig_id {$_POST['sidid']}\n"; else $suppress = "#{$_POST['descr']}\nsuppress gen_id {$_POST['gen_id']}, sig_id {$_POST['sidid']}\n"; $success = gettext("An entry for 'suppress gen_id {$_POST['gen_id']}, sig_id {$_POST['sidid']}' has been added to the Suppress List."); break; case "by_src": case "by_dst": // Check for valid IP addresses, exit if not valid if (is_ipaddr($_POST['ip'])) { if (empty($_POST['descr'])) $suppress = "suppress gen_id {$_POST['gen_id']}, sig_id {$_POST['sidid']}, track {$method}, ip {$_POST['ip']}\n"; else $suppress = "#{$_POST['descr']}\nsuppress gen_id {$_POST['gen_id']}, sig_id {$_POST['sidid']}, track {$method}, ip {$_POST['ip']}\n"; $success = gettext("An entry for 'suppress gen_id {$_POST['gen_id']}, sig_id {$_POST['sidid']}, track {$method}, ip {$_POST['ip']}' has been added to the Suppress List."); } else { header("Location: /suricata/suricata_alerts.php"); exit; } break; default: header("Location: /suricata/suricata_alerts.php"); exit; } /* Add the new entry to the Suppress List and signal Suricata to reload config */ if (suricata_add_supplist_entry($suppress)) { suricata_reload_config($a_instance[$instanceid]); $savemsg = $success; // Sync to configured CARP slaves if any are enabled suricata_sync_on_changes(); sleep(2); } else $input_errors[] = gettext("Suppress List '{$a_instance[$instanceid]['suppresslistname']}' is defined for this interface, but it could not be found!"); } if ($_POST['togglesid'] && is_numeric($_POST['sidid']) && is_numeric($_POST['gen_id'])) { // Get the GID and SID tags embedded in the clicked rule icon. $gid = $_POST['gen_id']; $sid= $_POST['sidid']; // See if the target SID is in our list of modified SIDs, // and toggle it if present. if (isset($enablesid[$gid][$sid])) unset($enablesid[$gid][$sid]); if (isset($disablesid[$gid][$sid])) unset($disablesid[$gid][$sid]); elseif (!isset($disablesid[$gid][$sid])) $disablesid[$gid][$sid] = "disablesid"; // Write the updated enablesid and disablesid values to the config file. $tmp = ""; foreach (array_keys($enablesid) as $k1) { foreach (array_keys($enablesid[$k1]) as $k2) $tmp .= "{$k1}:{$k2}||"; } $tmp = rtrim($tmp, "||"); if (!empty($tmp)) $a_instance[$instanceid]['rule_sid_on'] = $tmp; else unset($a_instance[$instanceid]['rule_sid_on']); $tmp = ""; foreach (array_keys($disablesid) as $k1) { foreach (array_keys($disablesid[$k1]) as $k2) $tmp .= "{$k1}:{$k2}||"; } $tmp = rtrim($tmp, "||"); if (!empty($tmp)) $a_instance[$instanceid]['rule_sid_off'] = $tmp; else unset($a_instance[$instanceid]['rule_sid_off']); /* Update the config.xml file. */ write_config(); /*************************************************/ /* Update the suricata.yaml file and rebuild the */ /* rules for this interface. */ /*************************************************/ $rebuild_rules = true; conf_mount_rw(); suricata_generate_yaml($a_instance[$instanceid]); conf_mount_ro(); $rebuild_rules = false; /* Signal Suricata to live-load the new rules */ suricata_reload_config($a_instance[$instanceid]); // Sync to configured CARP slaves if any are enabled suricata_sync_on_changes(); sleep(2); $savemsg = gettext("The state for rule {$gid}:{$sid} has been modified. Suricata is 'live-reloading' the new rules list. Please wait at least 15 secs for the process to complete before toggling additional rules."); } if ($_POST['delete']) { suricata_post_delete_logs($suricata_uuid); $fd = @fopen("{$suricatalogdir}suricata_{$if_real}{$suricata_uuid}/alerts.log", "w+"); if ($fd) fclose($fd); /* XXX: This is needed if suricata is run as suricata user */ mwexec('/bin/chmod 660 {$suricatalogdir}*', true); header("Location: /suricata/suricata_alerts.php?instance={$instanceid}"); exit; } if ($_POST['download']) { $save_date = date("Y-m-d-H-i-s"); $file_name = "suricata_logs_{$save_date}_{$if_real}.tar.gz"; exec("cd {$suricatalogdir}suricata_{$if_real}{$suricata_uuid} && /usr/bin/tar -czf {$g['tmp_path']}/{$file_name} *"); if (file_exists("{$g['tmp_path']}/{$file_name}")) { ob_start(); //important or other posts will fail if (isset($_SERVER['HTTPS'])) { header('Pragma: '); header('Cache-Control: '); } else { header("Pragma: private"); header("Cache-Control: private, must-revalidate"); } header("Content-Type: application/octet-stream"); header("Content-length: " . filesize("{$g['tmp_path']}/{$file_name}")); header("Content-disposition: attachment; filename = {$file_name}"); ob_end_clean(); //important or other post will fail readfile("{$g['tmp_path']}/{$file_name}"); // Clean up the temp file unlink_if_exists("{$g['tmp_path']}/{$file_name}"); } else $savemsg = gettext("An error occurred while creating archive"); } /* Load up an array with the current Suppression List GID,SID values */ $supplist = suricata_load_suppress_sigs($a_instance[$instanceid], true); $pgtitle = gettext("Suricata: Alerts"); include_once("head.inc"); ?> \n"; ?>
"> ">
  
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" onclick="enable_showFilter();" />   
" title="" />    " title="" />    " onclick="enable_hideFilter();" title="" />
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{$g['tmp_path']}/alerts_suricata{$suricata_uuid}"); if (file_exists("{$g['tmp_path']}/alerts_suricata{$suricata_uuid}")) { $tmpblocked = array_flip(suricata_get_blocked_ips()); $counter = 0; /*************** FORMAT without CSV patch -- ALERT -- ***********************************************************************************/ /* Line format: timestamp action[**] [gid:sid:rev] msg [**] [Classification: class] [Priority: pri] {proto} src:srcport -> dst:dstport */ /* 0 1 2 3 4 5 6 7 8 9 10 11 12 */ /****************************************************************************************************************************************/ /**************** FORMAT without CSV patch -- DECODER EVENT -- **************************************************************************/ /* Line format: timestamp action[**] [gid:sid:rev] msg [**] [Classification: class] [Priority: pri] [**] [Raw pkt: ...] */ /* 0 1 2 3 4 5 6 7 */ /************** *************************************************************************************************************************/ $fd = fopen("{$g['tmp_path']}/alerts_suricata{$suricata_uuid}", "r"); $buf = ""; while (($buf = fgets($fd)) !== FALSE) { $fields = array(); $tmp = array(); $decoder_event = FALSE; /**************************************************************/ /* Parse alert log entry to find the parts we want to display */ /**************************************************************/ // Field 0 is the event timestamp $fields['time'] = substr($buf, 0, strpos($buf, ' ')); // Field 1 is currently not used, so set to NULL $fields['action'] = null; // The regular expression match below returns an array as follows: // [2] => GID, [3] => SID, [4] => REV, [5] => MSG, [6] => CLASSIFICATION, [7] = PRIORITY preg_match('/\[\*{2}\]\s\[((\d+):(\d+):(\d+))\]\s(.*)\[\*{2}\]\s\[Classification:\s(.*)\]\s\[Priority:\s(\d+)\]\s/', $buf, $tmp); $fields['gid'] = trim($tmp[2]); $fields['sid'] = trim($tmp[3]); $fields['rev'] = trim($tmp[4]); $fields['msg'] = trim($tmp[5]); $fields['class'] = trim($tmp[6]); $fields['priority'] = trim($tmp[7]); // The regular expression match below looks for the PROTO, SRC and DST fields // and returns an array as follows: // [1] = PROTO, [2] => SRC:SPORT [3] => DST:DPORT if (preg_match('/\{(.*)\}\s(.*)\s->\s(.*)/', $buf, $tmp)) { // Get PROTO $fields['proto'] = trim($tmp[1]); // Get SRC $fields['src'] = trim(substr($tmp[2], 0, strrpos($tmp[2], ':'))); if (is_ipaddrv6($fields['src'])) $fields['src'] = inet_ntop(inet_pton($fields['src'])); // Get SPORT $fields['sport'] = trim(substr($tmp[2], strrpos($tmp[2], ':') + 1)); // Get DST $fields['dst'] = trim(substr($tmp[3], 0, strrpos($tmp[3], ':'))); if (is_ipaddrv6($fields['dst'])) $fields['dst'] = inet_ntop(inet_pton($fields['dst'])); // Get DPORT $fields['dport'] = trim(substr($tmp[3], strrpos($tmp[3], ':') + 1)); } else { // If no PROTO nor IP ADDR, then this is a DECODER EVENT $decoder_event = TRUE; $fields['proto'] = gettext("n/a"); $fields['sport'] = gettext("n/a"); $fields['dport'] = gettext("n/a"); } // Create a DateTime object from the event timestamp that // we can use to easily manipulate output formats. $event_tm = date_create_from_format("m/d/Y-H:i:s.u", $fields['time']); // Check the 'CATEGORY' field for the text "(null)" and // substitute "Not Assigned". if ($fields['class'] == "(null)") $fields['class'] = gettext("Not Assigned"); $fields['time'] = date_format($event_tm, "m/d/Y") . " " . date_format($event_tm, "H:i:s"); if ($filterlogentries && !suricata_match_filter_field($fields, $filterfieldsarray)) { continue; } /* Time */ $alert_time = date_format($event_tm, "H:i:s"); /* Date */ $alert_date = date_format($event_tm, "m/d/Y"); /* Description */ $alert_descr = $fields['msg']; $alert_descr_url = urlencode($fields['msg']); /* Priority */ $alert_priority = $fields['priority']; /* Protocol */ $alert_proto = $fields['proto']; /* IP SRC */ if ($decoder_event == FALSE) { $alert_ip_src = $fields['src']; /* Add zero-width space as soft-break opportunity after each colon if we have an IPv6 address */ $alert_ip_src = str_replace(":", ":​", $alert_ip_src); /* Add Reverse DNS lookup icon */ $alert_ip_src .= "
\"Icon"; /* Add icons for auto-adding to Suppress List if appropriate */ if (!suricata_is_alert_globally_suppressed($supplist, $fields['gid'], $fields['sid']) && !isset($supplist[$fields['gid']][$fields['sid']]['by_src'][$fields['src']])) { $alert_ip_src .= "  "; } elseif (isset($supplist[$fields['gid']][$fields['sid']]['by_src'][$fields['src']])) { $alert_ip_src .= "  "; } /* Add icon for auto-removing from Blocked Table if required */ if (isset($tmpblocked[$fields['src']])) { $alert_ip_src .= " "; } } else { if (preg_match('/\s\[Raw pkt:(.*)\]/', $buf, $tmp)) $alert_ip_src = "
" . gettext("Decoder Event") . "
"; else $alert_ip_src = gettext("Decoder Event"); } /* IP SRC Port */ $alert_src_p = $fields['sport']; /* IP DST */ if ($decoder_event == FALSE) { $alert_ip_dst = $fields['dst']; /* Add zero-width space as soft-break opportunity after each colon if we have an IPv6 address */ $alert_ip_dst = str_replace(":", ":​", $alert_ip_dst); /* Add Reverse DNS lookup icons */ $alert_ip_dst .= "
\"Icon"; /* Add icons for auto-adding to Suppress List if appropriate */ if (!suricata_is_alert_globally_suppressed($supplist, $fields['gid'], $fields['sid']) && !isset($supplist[$fields['gid']][$fields['sid']]['by_dst'][$fields['dst']])) { $alert_ip_dst .= "  "; } elseif (isset($supplist[$fields['gid']][$fields['sid']]['by_dst'][$fields['dst']])) { $alert_ip_dst .= "  "; } /* Add icon for auto-removing from Blocked Table if required */ if (isset($tmpblocked[$fields['dst']])) { $alert_ip_dst .= " "; } } else { $alert_ip_dst = gettext("n/a"); } /* IP DST Port */ $alert_dst_p = $fields['dport']; /* SID */ $alert_sid_str = "{$fields['gid']}:{$fields['sid']}"; if (!suricata_is_alert_globally_suppressed($supplist, $fields['gid'], $fields['sid'])) { $sidsupplink = ""; } else { $sidsupplink = ""; } /* Add icon for toggling rule state */ if (isset($disablesid[$fields['gid']][$fields['sid']])) { $sid_dsbl_link = ""; } else { $sid_dsbl_link = ""; } /* DESCRIPTION */ $alert_class = $fields['class']; echo "\n"; $counter++; } unset($fields, $buf, $tmp); fclose($fd); unlink_if_exists("{$g['tmp_path']}/alerts_suricata{$suricata_uuid}"); } } ?>
{$alert_date}
{$alert_time}
{$alert_priority} {$alert_proto} {$alert_class} {$alert_ip_src} {$alert_src_p} {$alert_ip_dst} {$alert_dst_p} {$alert_sid_str}
{$sidsupplink}  {$sid_dsbl_link}
{$alert_descr}