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-rw-r--r--config/suricata/suricata_rules_flowbits.php306
1 files changed, 306 insertions, 0 deletions
diff --git a/config/suricata/suricata_rules_flowbits.php b/config/suricata/suricata_rules_flowbits.php
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+++ b/config/suricata/suricata_rules_flowbits.php
@@ -0,0 +1,306 @@
+<?php
+/*
+ * suricata_rules_flowbits.php
+ * 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, $rebuild_rules;
+
+$suricatadir = SURICATADIR;
+$flowbit_rules_file = FLOWBITS_FILENAME;
+$rules_map = array();
+$supplist = array();
+
+if (!is_array($config['installedpackages']['suricata']['rule'])) {
+ $config['installedpackages']['suricata']['rule'] = array();
+}
+$a_nat = &$config['installedpackages']['suricata']['rule'];
+
+// Set who called us so we can return to the correct page with
+// the RETURN button. We will just trust this User-Agent supplied
+// string for now.
+session_start();
+if(!isset($_SESSION['org_referer']))
+ $_SESSION['org_referer'] = $_SERVER['HTTP_REFERER'];
+$referrer = $_SESSION['org_referer'];
+
+if ($_POST['cancel']) {
+ session_start();
+ unset($_SESSION['org_referer']);
+ session_write_close();
+ header("Location: {$referrer}");
+ exit;
+}
+
+$id = $_GET['id'];
+if (isset($_POST['id']))
+ $id = $_POST['id'];
+if (is_null($id)) {
+ session_start();
+ unset($_SESSION['org_referer']);
+ session_write_close();
+ header("Location: /suricata/suricata_interfaces.php");
+ exit;
+}
+
+$if_real = suricata_get_real_interface($a_nat[$id]['interface']);
+$suricata_uuid = $a_nat[$id]['uuid'];
+
+/* We should normally never get to this page if Auto-Flowbits are disabled, but just in case... */
+if ($a_nat[$id]['autoflowbitrules'] == 'on') {
+ if (file_exists("{$suricatadir}suricata_{$suricata_uuid}_{$if_real}/rules/{$flowbit_rules_file}") &&
+ filesize("{$suricatadir}suricata_{$suricata_uuid}_{$if_real}/rules/{$flowbit_rules_file}") > 0) {
+ $rules_map = suricata_load_rules_map("{$suricatadir}suricata_{$suricata_uuid}_{$if_real}/rules/{$flowbit_rules_file}");
+ }
+ else
+ $savemsg = gettext("There are no flowbit-required rules necessary for the current enforcing rule set.");
+}
+else
+ $input_errors[] = gettext("Auto-Flowbit rule generation is disabled for this interface!");
+
+if ($_GET['act'] == "addsuppress" && is_numeric($_GET['sidid']) && is_numeric($_GET['gen_id'])) {
+ $descr = suricata_get_msg($rules_map[$_GET['gen_id']][$_GET['sidid']]['rule']);
+ if (empty($descr))
+ $suppress = "suppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}\n";
+ else
+ $suppress = "# {$descr}\nsuppress gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}\n";
+ 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'];
+ $found_list = false;
+
+ if (empty($a_nat[$id]['suppresslistname']) || $a_nat[$id]['suppresslistname'] == 'default') {
+ $s_list = array();
+ $s_list['uuid'] = uniqid();
+ $s_list['name'] = $a_nat[$id]['interface'] . "suppress" . "_" . $s_list['uuid'];
+ $s_list['descr'] = "Auto-generated list for Alert suppression";
+ $s_list['suppresspassthru'] = base64_encode($suppress);
+ $a_suppress[] = $s_list;
+ $a_nat[$id]['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'] == $a_nat[$id]['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] = $alist;
+ }
+ }
+ }
+ }
+ if ($found_list) {
+ write_config();
+ $rebuild_rules = false;
+ sync_suricata_package_config();
+ suricata_reload_config($a_nat[$id]);
+ $savemsg = gettext("An entry to suppress the Alert for 'gen_id {$_GET['gen_id']}, sig_id {$_GET['sidid']}' has been added to Suppress List '{$a_nat[$id]['suppresslistname']}'.");
+ }
+ else {
+ /* We did not find the defined list, so notify the user with an error */
+ $input_errors[] = gettext("Suppress List '{$a_nat[$id]['suppresslistname']}' is defined for this interface, but it could not be found!");
+ }
+}
+
+function truncate($string, $length) {
+
+ /********************************
+ * This function truncates the *
+ * passed string to the length *
+ * specified adding ellipsis if *
+ * truncation was necessary. *
+ ********************************/
+ if (strlen($string) > $length)
+ $string = substr($string, 0, ($length - 3)) . "...";
+ return $string;
+}
+
+/* Load up an array with the current Suppression List GID,SID values */
+$supplist = suricata_load_suppress_sigs($a_nat[$id]);
+
+$if_friendly = suricata_get_friendly_interface($a_nat[$id]['interface']);
+$pgtitle = gettext("Suricata: Interface {$if_friendly} - Flowbit Rules");
+include_once("head.inc");
+
+?>
+
+<body link="#0000CC" vlink="#0000CC" alink="#0000CC" >
+
+<?php
+include("fbegin.inc");
+if($pfsense_stable == 'yes'){echo '<p class="pgtitle">' . $pgtitle . '</p>';}
+if ($input_errors) print_input_errors($input_errors);
+if ($savemsg)
+ print_info_box($savemsg);
+?>
+<form action="suricata_rules_flowbits.php" method="post" name="iform" id="iform">
+<div id="boxarea">
+<table width="100%" border="0" cellpadding="0" cellspacing="0">
+<tr>
+<td class="tabcont">
+<table width="100%" border="0" cellpadding="6" cellspacing="0">
+ <tr>
+ <td valign="middle" class="listtopic"><?php echo gettext("Auto-Generated Flowbit-Required Rules"); ?></td>
+ </tr>
+ <tr>
+ <td width="78%" class="vncell">
+ <?php echo gettext("The rules listed below are required to be included in the rules set ") .
+ gettext("because they set flowbits that are checked and relied upon by rules in the enforcing rules set. ") .
+ gettext("If these dependent flowbits are not set, then some of your chosen rules may not fire. ") .
+ gettext("Enabling all the rules that set these dependent flowbits ensures your chosen rules fire as intended. ") .
+ gettext("Most flowbits rules contain the \"noalert\" keyword to prevent an alert from firing ") .
+ gettext("when the flowbit is detected. For those flowbit rules that do not contain the \"noalert\" option, click the ") .
+ gettext("icon displayed beside the Signature ID (SID) to add the alert to the Suppression List if desired."); ?></td>
+ </tr>
+ <tr>
+ <td valign="middle" class="listtopic"><?php echo gettext("Flowbit-Required Rules for {$if_friendly}"); ?></td>
+ </tr>
+ <tr>
+ <td width="78%" class="vncell">
+ <table width="100%" border="0" cellspacing="2" cellpadding="0">
+ <tr>
+ <td width="17px"><img src="../themes/<?=$g['theme']?>/images/icons/icon_plus.gif" width='12' height='12' border='0'/></td>
+ <td><span class="vexpl"><?php echo gettext("Alert is Not Suppressed"); ?></span></td>
+ <td rowspan="3" align="right"><input id="cancel" name="cancel" type="submit" class="formbtn" <?php
+ echo "value=\"" . gettext("Return") . "\" title=\"" . gettext("Return to previous page") . "\""; ?>/>
+ <input name="id" type="hidden" value="<?=$id;?>" /></td>
+ </tr>
+ <tr>
+ <td width="17px"><img src="../themes/<?=$g['theme']?>/images/icons/icon_plus_d.gif" width='12' height='12' border='0'/></td>
+ <td><span class="vexpl"><?php echo gettext("Alert has been Suppressed"); ?></span></td>
+ </tr>
+ <tr>
+ <td width="17px"> </td>
+ <td colspan="2" class="vexpl"><?php echo "<span class=\"red\"><strong>" .
+ gettext("Note: ") . "</strong></span>". gettext("the icon is only ") .
+ gettext("displayed for flowbit rules without the \"noalert\" option."); ?></td>
+ </tr>
+ </table>
+ </td>
+ </tr>
+ <tr>
+ <td>
+ <table id="myTable" width="100%" class="sortable" border="1" cellpadding="0" cellspacing="0">
+ <colgroup>
+ <col width="11%" axis="number">
+ <col width="10%" axis="string">
+ <col width="14%" axis="string">
+ <col width="14%" axis="string">
+ <col width="20%" axis="string">
+ <col axis="string">
+ </colgroup>
+ <thead>
+ <tr>
+ <th class="listhdrr" axis="number"><?php echo gettext("SID"); ?></th>
+ <th class="listhdrr" axis="string"><?php echo gettext("Proto"); ?></th>
+ <th class="listhdrr" axis="string"><?php echo gettext("Source"); ?></th>
+ <th class="listhdrr" axis="string"><?php echo gettext("Destination"); ?></th>
+ <th class="listhdrr" axis="string"><?php echo gettext("Flowbits"); ?></th>
+ <th class="listhdrr" axis="string"><?php echo gettext("Message"); ?></th>
+ </tr>
+ <thead>
+ <tbody>
+ <?php
+ $count = 0;
+ foreach ($rules_map as $k1 => $rulem) {
+ foreach ($rulem as $k2 => $v) {
+ $sid = suricata_get_sid($v['rule']);
+ $gid = suricata_get_gid($v['rule']);
+
+ // Pick off the first section of the rule (prior to the start of the MSG field),
+ // and then use a REGX split to isolate the remaining fields into an array.
+ $tmp = substr($v['rule'], 0, strpos($v['rule'], "("));
+ $tmp = trim(preg_replace('/^\s*#+\s*/', '', $tmp));
+ $rule_content = preg_split('/[\s]+/', $tmp);
+
+ $protocol = $rule_content[1]; //protocol
+ $source = truncate($rule_content[2], 14); //source
+ $destination = truncate($rule_content[5], 14); //destination
+ $message = suricata_get_msg($v['rule']);
+ $flowbits = implode("; ", suricata_get_flowbits($v['rule']));
+ if (strstr($flowbits, "noalert"))
+ $supplink = "";
+ else {
+ if (!isset($supplist[$gid][$sid])) {
+ $supplink = "<a href=\"?id={$id}&act=addsuppress&sidid={$sid}&gen_id={$gid}\">";
+ $supplink .= "<img src=\"../themes/{$g['theme']}/images/icons/icon_plus.gif\" ";
+ $supplink .= "width='12' height='12' border='0' title='";
+ $supplink .= gettext("Click to add to Suppress List") . "'/></a>";
+ }
+ else {
+ $supplink = "<img src=\"../themes/{$g['theme']}/images/icons/icon_plus_d.gif\" ";
+ $supplink .= "width='12' height='12' border='0' title='";
+ $supplink .= gettext("Alert has been suppressed") . "'/>";
+ }
+ }
+
+ // Use "echo" to write the table HTML row-by-row.
+ echo "<tr>" .
+ "<td class=\"listr\">{$sid}&nbsp;{$supplink}</td>" .
+ "<td class=\"listr\">{$protocol}</td>" .
+ "<td class=\"listr\"><span title=\"{$rule_content[2]}\">{$source}</span></td>" .
+ "<td class=\"listr\"><span title=\"{$rule_content[5]}\">{$destination}</span></td>" .
+ "<td class=\"listr\" style=\"word-wrap:break-word; word-break:normal;\">{$flowbits}</td>" .
+ "<td class=\"listr\" style=\"word-wrap:break-word; word-break:normal;\">{$message}</td>" .
+ "</tr>";
+ $count++;
+ }
+ }
+ unset($rulem, $v);
+ ?>
+ </tbody>
+ </table>
+ </td>
+ </tr>
+ <?php if ($count > 20): ?>
+ <tr>
+ <td align="center" valign="middle">
+ <input id="cancel" name="cancel" type="submit" class="formbtn" <?php
+ echo "value=\"" . gettext("Return") . "\" title=\"" . gettext("Return to previous page") . "\""; ?>/>
+ <input name="id" type="hidden" value="<?=$id;?>" />
+ </td>
+ </tr>
+ <?php endif; ?>
+</table>
+</td>
+</tr>
+</table>
+</div>
+</form>
+<?php include("fend.inc"); ?>
+</body>
+</html>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 18:58:32 +0000