. * Copyright (C) 2003-2004 Manuel Kasper . * Copyright (C) 2006 Scott Ullrich * Copyright (C) 2012 Ermal Luci * 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"); $snortalertlogt = $config['installedpackages']['snortglobal']['snortalertlogtype']; $supplist = array(); function snort_is_alert_globally_suppressed($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 snort_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']['snortglobal']['suppress'])) $config['installedpackages']['snortglobal']['suppress'] = array(); if (!is_array($config['installedpackages']['snortglobal']['suppress']['item'])) $config['installedpackages']['snortglobal']['suppress']['item'] = array(); $a_suppress = &$config['installedpackages']['snortglobal']['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] = $alist; } } } } /* If we created a new list or updated an existing one, save the change, */ /* tell Snort to load it, and return true; otherwise return false. */ if ($found_list) { write_config(); sync_snort_package_config(); snort_reload_config($a_instance[$instanceid]); return true; } else return false; } 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'] = $config['installedpackages']['snortglobal']['alertsblocks']['alertnumber']; } if (empty($pconfig['alertnumber'])) $pconfig['alertnumber'] = '250'; if (empty($pconfig['arefresh'])) $pconfig['arefresh'] = 'off'; $anentries = $pconfig['alertnumber']; if ($_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 ($_POST['todelete'] || $_GET['todelete']) { $ip = ""; if($_POST['todelete']) $ip = $_POST['todelete']; else if($_GET['todelete']) $ip = $_GET['todelete']; if (is_ipaddr($ip)) { exec("/sbin/pfctl -t snort2c -T delete {$ip}"); $savemsg = gettext("Host IP address {$ip} has been removed from the Blocked Table."); } } if ($_GET['act'] == "addsuppress" && is_numeric($_GET['sidid']) && is_numeric($_GET['gen_id'])) { if (empty($_GET['descr'])) $suppress = "suppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}\n"; else $suppress = "#{$_GET['descr']}\nsuppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}"; /* Add the new entry to the Suppress List */ if (snort_add_supplist_entry($suppress)) $savemsg = gettext("An entry for 'suppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}' has been added to the Suppress List."); else $input_errors[] = gettext("Suppress List '{$a_instance[$instanceid]['suppresslistname']}' is defined for this interface, but it could not be found!"); } if (($_GET['act'] == "addsuppress_srcip" || $_GET['act'] == "addsuppress_dstip") && is_numeric($_GET['sidid']) && is_numeric($_GET['gen_id'])) { if ($_GET['act'] == "addsuppress_srcip") $method = "by_src"; else $method = "by_dst"; /* Check for valid IP addresses, exit if not valid */ if (is_ipaddr($_GET['ip']) || is_ipaddrv6($_GET['ip'])) { if (empty($_GET['descr'])) $suppress = "suppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}, track {$method}, ip {$_GET['ip']}\n"; else $suppress = "#{$_GET['descr']}\nsuppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}, track {$method}, ip {$_GET['ip']}\n"; } else { header("Location: /snort/snort_alerts.php?instance={$instanceid}"); exit; } /* Add the new entry to the Suppress List */ if (snort_add_supplist_entry($suppress)) $savemsg = gettext("An entry for 'suppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}, track {$method}, ip {$_GET['ip']}' has been added to the Suppress List."); else /* We did not find the defined list, so notify the user with an error */ $input_errors[] = gettext("Suppress List '{$a_instance[$instanceid]['suppresslistname']}' is defined for this interface, but it could not be found!"); } if ($_GET['action'] == "clear" || $_POST['delete']) { snort_post_delete_logs($snort_uuid); $fd = @fopen("/var/log/snort/snort_{$if_real}{$snort_uuid}/alert", "w+"); if ($fd) fclose($fd); /* XXX: This is needed if snort is run as snort user */ mwexec('/bin/chmod 660 /var/log/snort/*', true); if (file_exists("{$g['varrun_path']}/snort_{$if_real}{$snort_uuid}.pid")) mwexec("/bin/pkill -HUP -F {$g['varrun_path']}/snort_{$if_real}{$snort_uuid}.pid -a"); header("Location: /snort/snort_alerts.php?instance={$instanceid}"); exit; } if ($_POST['download']) { $save_date = exec('/bin/date "+%Y-%m-%d-%H-%M-%S"'); $file_name = "snort_logs_{$save_date}_{$if_real}.tar.gz"; exec("cd /var/log/snort/snort_{$if_real}{$snort_uuid} && /usr/bin/tar -czf /tmp/{$file_name} *"); if (file_exists("/tmp/{$file_name}")) { ob_start(); //important or other posts will fail if (isset($_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("/tmp/{$file_name}")); header("Content-disposition: attachment; filename = {$file_name}"); ob_end_clean(); //important or other post will fail readfile("/tmp/{$file_name}"); // Clean up the temp file @unlink("/tmp/{$file_name}"); } else $savemsg = gettext("An error occurred while creating archive"); } /* Load up an array with the current Suppression List GID,SID values */ $supplist = snort_load_suppress_sigs($a_instance[$instanceid], true); $pgtitle = gettext("Snort: Snort Alerts"); include_once("head.inc"); ?> \n"; if($pfsense_stable == 'yes'){echo '

' . $pgtitle . '

';} /* Display Alert message */ if ($input_errors) { print_input_errors($input_errors); // TODO: add checks } if ($savemsg) { print_info_box($savemsg); } ?>
  
  
> ', '', '', ''); ?>   ', '', '', ''); ?>
  
/tmp/alert_{$snort_uuid}"); if (file_exists("/tmp/alert_{$snort_uuid}")) { $tmpblocked = array_flip(snort_get_blocked_ips()); $counter = 0; /* 0 1 2 3 4 5 6 7 8 9 10 11 12 */ /* File format timestamp,sig_generator,sig_id,sig_rev,msg,proto,src,srcport,dst,dstport,id,classification,priority */ $fd = fopen("/tmp/alert_{$snort_uuid}", "r"); while (($fields = fgetcsv($fd, 1000, ',', '"')) !== FALSE) { if(count($fields) < 11) continue; /* Time */ $alert_time = substr($fields[0], strpos($fields[0], '-')+1, -8); /* Date */ $alert_date = substr($fields[0], 0, strpos($fields[0], '-')); /* Description */ $alert_descr = $fields[4]; $alert_descr_url = urlencode($fields[4]); /* Priority */ $alert_priority = $fields[12]; /* Protocol */ $alert_proto = $fields[5]; /* IP SRC */ $alert_ip_src = $fields[6]; /* 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 icons */ $alert_ip_src .= "
"; $alert_ip_src .= ""; $alert_ip_src .= " "; $alert_ip_src .= ""; /* Add icons for auto-adding to Suppress List if appropriate */ if (!snort_is_alert_globally_suppressed($supplist, $fields[1], $fields[2]) && !isset($supplist[$fields[1]][$fields[2]]['by_src'][$fields[6]])) { $alert_ip_src .= "  "; $alert_ip_src .= ""; } elseif (isset($supplist[$fields[1]][$fields[2]]['by_src'][$fields[6]])) { $alert_ip_src .= "  "; } /* Add icon for auto-removing from Blocked Table if required */ if (isset($tmpblocked[$fields[6]])) { $alert_ip_src .= " "; $alert_ip_src .= " \"Remove"; } /* IP SRC Port */ $alert_src_p = $fields[7]; /* IP Destination */ $alert_ip_dst = $fields[8]; /* 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 .= "
"; $alert_ip_dst .= ""; $alert_ip_dst .= " "; $alert_ip_dst .= ""; /* Add icons for auto-adding to Suppress List if appropriate */ if (!snort_is_alert_globally_suppressed($supplist, $fields[1], $fields[2]) && !isset($supplist[$fields[1]][$fields[2]]['by_dst'][$fields[8]])) { $alert_ip_dst .= "  "; $alert_ip_dst .= ""; } elseif (isset($supplist[$fields[1]][$fields[2]]['by_dst'][$fields[8]])) { $alert_ip_dst .= "  "; } /* Add icon for auto-removing from Blocked Table if required */ if (isset($tmpblocked[$fields[8]])) { $alert_ip_dst .= " "; $alert_ip_dst .= " \"Remove"; } /* IP DST Port */ $alert_dst_p = $fields[9]; /* SID */ $alert_sid_str = "{$fields[1]}:{$fields[2]}"; if (!snort_is_alert_globally_suppressed($supplist, $fields[1], $fields[2])) { $sidsupplink = ""; $sidsupplink .= ""; } else { $sidsupplink = ""; } $alert_class = $fields[11]; echo "\n"; $counter++; } fclose($fd); @unlink("/tmp/alert_{$snort_uuid}"); } } ?>
{$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}
{$alert_descr}