Snort Widget v0.3.2, Snort 2.9.2.3 pkg v. 2.5.1 Alerts Tab and Blocked tab fix

digdug3 · Jul 26, 2012, 6:46 AM

Here are fixes for the Snort Widget v0.3.2, Snort 2.9.2.3 pkg v. 2.5.1 Alerts Tab and Blocked tab. Please test. If all works it can be committed.
Snort Widget v0.3.2 fix (update 26-07-2012): Sorts all interfaces by date, displays ip and port, fixes Snort alert descriptions with ",". Uses firewall widget setting as number of entries. Removed bogus line.
Just install Snort Widget v0.3.2 and replace the /usr/local/www/widgets/snort_alerts.widget.php with this:

 $val){
		$offset = 0;
		$found = false;
		foreach ($temp_array as $tmp_key => $tmp_val) {
			if (!$found and strtolower($val[$subkey]) > strtolower($tmp_val[$subkey])) {
				$temp_array = array_merge((array)array_slice($temp_array,0,$offset), array($key => $val), array_slice($temp_array,$offset));
				$found = true;
			};
			$offset++;
		};
		if (!$found) $temp_array = array_merge($temp_array, array($key => $val));
	};

	if ($sort_ascending) {
		$array = array_reverse($temp_array);
	} else $array = $temp_array;
};

/* check if firewall widget variable is set */
if (!isset($nentries)) $nentries = 5;

/* retrieve snort variables */
require_once("/usr/local/pkg/snort/snort.inc");

if (!is_array($config['installedpackages']['snortglobal']['rule']))
	$config['installedpackages']['snortglobal']['rule'] = array();
$a_instance = &$config['installedpackages']['snortglobal']['rule'];

/* read log file(s) */
$counter=0;
foreach ($a_instance as $instanceid => $instance) {
	$snort_uuid = $a_instance[$instanceid]['uuid'];
	$if_real = snort_get_real_interface($a_instance[$instanceid]['interface']);

	/* make sure alert file exists */
	if (file_exists("/var/log/snort/snort_{$if_real}{$snort_uuid}/alert")) {
		exec("tail -n{$nentries} /var/log/snort/snort_{$if_real}{$snort_uuid}/alert > /tmp/alert_{$snort_uuid}");
		if (file_exists("/tmp/alert_{$snort_uuid}")) {
			$tmpblocked = array_flip(snort_get_blocked_ips());

			/*                 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;

				$snort_alerts[$counter]['instanceid'] = $a_instance[$instanceid]['interface'];
				$snort_alerts[$counter]['timestamp'] = $fields[0];
				$snort_alerts[$counter]['timeonly'] = substr($fields[0], 6, -8);
				$snort_alerts[$counter]['dateonly'] = substr($fields[0], 0, -17);
				$snort_alerts[$counter]['src'] = $fields[6];
				$snort_alerts[$counter]['srcport'] = $fields[7];
				$snort_alerts[$counter]['dst'] = $fields[8];
				$snort_alerts[$counter]['dstport'] = $fields[9];
				$snort_alerts[$counter]['priority'] = $fields[12];
				$snort_alerts[$counter]['category'] = $fields[11];
				$counter++;
			};
			fclose($fd);
			@unlink("/tmp/alert_{$snort_uuid}");
		};
	};
};

/* sort the array */
if (isset($config['syslog']['reverse'])) {
	sksort($snort_alerts, 'timestamp', false);
} else {
	sksort($snort_alerts, 'timestamp', true);
};

/* display the result */
?>

	
		
		  IF/Date
			Src/Dst
			Details
		



				" . $alert['instanceid'] . "
" . $alert['timeonly'] . " " . $alert['dateonly'] . "		
				" . $alert['src'] . ":" . $alert['srcport'] . "
" . $alert['dst'] . ":" . $alert['dstport'] . "
				Pri : " . $alert['priority'] . "
Cat : " . $alert['category'] . "
			");
		$counter++;
		if($counter >= $nentries) break;
	}
};
?>

Snort 2.9.2.3 pkg v. 2.5.1 Alerts Tab fix, fixes Snort alert descriptions with ",".
Just install Snort 2.9.2.3 pkg v. 2.5.1 package and replace /usr/local/www/snort/snort_alerts.php with this:

.
 * Copyright (C) 2003-2004 Manuel Kasper ```
**Snort 2.9.2.3 pkg v. 2.5.1 Blocked Tab fix**, fixes Snort blocked descriptions with ",". (Not just N/A)
Just install Snort 2.9.2.3 pkg v. 2.5.1 package and replace /usr/local/www/snort/snort\_blocked.php with this:

{
ob_start(); //important or other posts will fail
$save_date = exec('/bin/date "+%Y-%m-%d-%H-%M-%S"');
$file_name = "snort_blocked_{$save_date}.tar.gz";
exec('/bin/mkdir -p /tmp/snort_blocked');
file_put_contents("/tmp/snort_blocked/snort_block.pf", "");
foreach($blocked_ips_array_save as $counter => $fileline) {
if (empty($fileline))
continue;
$fileline = trim($fileline, " \n\t");
file_put_contents("/tmp/snort_blocked/snort_block.pf", "{$fileline}\n", FILE_APPEND);
}

exec("/usr/bin/tar cf /tmp/{$file_name} /tmp/snort_blocked");

if(file_exists("/tmp/{$file_name}")) {
	header("Expires: Mon, 26 Jul 1997 05:00:00 GMT\n");
	header("Pragma: private"); // needed for IE
	header("Cache-Control: private, must-revalidate"); // needed for IE
	header('Content-type: application/force-download');
	header('Content-Transfer-Encoding: Binary');
	header("Content-length: " . filesize("/tmp/{$file_name}"));
	header("Content-disposition: attachment; filename = {$file_name}");
	readfile("/tmp/{$file_name}");
	ob_end_clean(); //importanr or other post will fail
	@unlink("/tmp/{$file_name}");
	exec("/bin/rm -fr /tmp/snort_blocked");
} else
	$savemsg = "An error occurred while createing archive";

} else
$savemsg = "No content on snort block list";
}

if ($_POST['save'])
{
/* no errors */
if (!$input_errors) {
$config['installedpackages']['snortglobal']['alertsblocks']['brefresh'] = $_POST['brefresh'] ? 'on' : 'off';
$config['installedpackages']['snortglobal']['alertsblocks']['blertnumber'] = $_POST['blertnumber'];

	write_config();

	header("Location: /snort/snort_blocked.php");
	exit;
}

}

$pgtitle = "Services: Snort Blocked Hosts";
include_once("head.inc");

?>

\n";
?>

' . $pgtitle . '

';}?>

			Last 
			Blocked.
			This page lists hosts that have
			been blocked by Snort.  
		


		
			Save or Remove Hosts
			
				 All
			blocked hosts will be saved.  **Warning:**
			all hosts will be removed.


			
		
		
			Auto Refresh and Log View
			
				 Refresh >
			**Default** is **ON**.  Enter the
			number of blocked entries to view. **Default** is **500**.
			
		



	
		
			
				#
				IP
				Alert Description
				Remove
			


	 $blocked_msg) {
			$blocked_desc = "

" . implode("
", $blocked_msg);
if($counter > $bnentries)
break;
else
$counter++;

			/* use one echo to do the magic*/
			echo "
		 {$counter}
		 {$blocked_ip}
		 {$blocked_desc}
		[
		![\"Delete\"](\"../themes/{$g['theme']}/images/icons/icon_x.gif\")][0]

\n";

		}

		echo "\n{$counter} items listed.

";
} else
echo "\n
There are currently no items being blocked by snort.

";

?>



[0]: snort_blocked.php?todelete=" . trim(urlencode($blocked_ip)) . "

eri-- · Jul 25, 2012, 6:59 AM

Wy don't you send pull requests on github?

digdug3 · Jul 25, 2012, 12:09 PM

I did this morning. Thanks for the reply.

Cino · Jul 27, 2012, 6:59 PM

@digdug3:

I did this morning. Thanks for the reply.

they haven't been pulled in yet :-(

digdug3 · Jul 28, 2012, 9:07 AM

Just checked. Ermal pushed them all 11 hours ago. I did something wrong at Github.
As an extra it looks like this also fixes the quotes when adding a rule to the suppression list.

Added another pull request to add back the link to Snort Alerts in the widget.

fillmoreb · Aug 2, 2012, 2:31 AM

Is this supposed to fix the

Warning: Invalid argument supplied for foreach() in /usr/local/www/widgets/widgets/snort_alerts.widget.php on line 36

error in the Snort Alerts Widget? Cuz I still get that. :(

CS · Aug 3, 2012, 11:34 AM

I also get the same error msg.

digdug3 · Aug 3, 2012, 2:27 PM

Do you have any alerts in the Snort alerts list?
What version of Snort and pfSense are you using?

digdug3 · Aug 3, 2012, 2:46 PM

This should fix the 'foreach' error:

Snort Widget v0.3.2 fix (update 03-08-2012): Sorts all interfaces by date, displays ip and port, fixes Snort alert descriptions with ",". Uses firewall widget setting as number of entries. Removed bogus line. Fixed 'foreach' error when no alerts are found.
Just install Snort Widget v0.3.2 and replace the /usr/local/www/widgets/snort_alerts.widget.php with this:

/*
    snort_alerts.widget.php
    Copyright (C) 2009 Jim Pingle
    mod 03-08-2012

    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.
*/
global $config, $g;

/* array sorting */
function sksort(&$array, $subkey="id", $sort_ascending=false) {
	if (count($array)) {
		$temp_array[key($array)] = array_shift($array);
	};

	foreach ($array as $key => $val){
		$offset = 0;
		$found = false;
		foreach ($temp_array as $tmp_key => $tmp_val) {
			if (!$found and strtolower($val[$subkey]) > strtolower($tmp_val[$subkey])) {
				$temp_array = array_merge((array)array_slice($temp_array,0,$offset), array($key => $val), array_slice($temp_array,$offset));
				$found = true;
			};
			$offset++;
		};
		if (!$found) $temp_array = array_merge($temp_array, array($key => $val));
	};

	if ($sort_ascending) {
		$array = array_reverse($temp_array);
	} else $array = $temp_array;
};

/* check if firewall widget variable is set */
if (!isset($nentries)) $nentries = 5;

/* retrieve snort variables */
require_once("/usr/local/pkg/snort/snort.inc");
if (!is_array($config['installedpackages']['snortglobal']['rule']))
	$config['installedpackages']['snortglobal']['rule'] = array();
$a_instance = &$config['installedpackages']['snortglobal']['rule'];

/* read log file(s) */
$counter=0;
foreach ($a_instance as $instanceid => $instance) {
	$snort_uuid = $a_instance[$instanceid]['uuid'];
	$if_real = snort_get_real_interface($a_instance[$instanceid]['interface']);

	/* make sure alert file exists */
	if (file_exists("/var/log/snort/snort_{$if_real}{$snort_uuid}/alert")) {
		exec("tail -n{$nentries} /var/log/snort/snort_{$if_real}{$snort_uuid}/alert > /tmp/alert_{$snort_uuid}");
		if (file_exists("/tmp/alert_{$snort_uuid}")) {
			$tmpblocked = array_flip(snort_get_blocked_ips());

			/*                 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;

				$snort_alerts[$counter]['instanceid'] = $a_instance[$instanceid]['interface'];
				$snort_alerts[$counter]['timestamp'] = $fields[0];
				$snort_alerts[$counter]['timeonly'] = substr($fields[0], 6, -8);
				$snort_alerts[$counter]['dateonly'] = substr($fields[0], 0, -17);
				$snort_alerts[$counter]['src'] = $fields[6];
				$snort_alerts[$counter]['srcport'] = $fields[7];
				$snort_alerts[$counter]['dst'] = $fields[8];
				$snort_alerts[$counter]['dstport'] = $fields[9];
				$snort_alerts[$counter]['priority'] = $fields[12];
				$snort_alerts[$counter]['category'] = $fields[11];
				$counter++;
			};
			fclose($fd);
			@unlink("/tmp/alert_{$snort_uuid}");
		};
	};
};

/* display the result */
?>

if (is_array($snort_alerts)) {
	/* sort the array */
	if (isset($config['syslog']['reverse'])) {
		sksort($snort_alerts, 'timestamp', false);
	} else {
		sksort($snort_alerts, 'timestamp', true);
	};

	$counter=0;
	foreach ($snort_alerts as $alert) {
		echo("	

");
		$counter++;
		if($counter >= $nentries) break;
	}
};
?>

| IF/Date |			 Src/Dst |			 Details |		
				 " . $alert['instanceid'] . "
" . $alert['timeonly'] . " " . $alert['dateonly'] . " |						 " . $alert['src'] . ":" . $alert['srcport'] . "
" . $alert['dst'] . ":" . $alert['dstport'] . " |				 Pri : " . $alert['priority'] . "
Cat : " . $alert['category'] . " |

Github pull request made.

fillmoreb · Aug 4, 2012, 12:48 AM

I no longer get the error. Thanx! I also have no alerts, so I'm waiting to see if they show up. ;)

digdug3 · Aug 5, 2012, 10:06 AM

@fillmoreb: Thanks for the bugreport and testing.
@ermal: could you push this?

Topper727 · Aug 8, 2012, 12:55 PM

I had the problem and the fix worked for me. Not see a block yet but no more error shows.

digdug3 · Aug 11, 2012, 10:08 AM

Thanks for the response. The widget will only display alerts if there are any.

CS · Aug 11, 2012, 10:22 AM

I am waiting for ermal to pull the changes. ;)

tester_02 · Aug 23, 2012, 1:11 AM

Has this been pushed to production?
Should we be looking for a version change, or just reinstall the package?

digdug3 · Aug 27, 2012, 2:08 PM

As soon as it has been pulled you just have to reinstall.

java007md · Aug 27, 2012, 5:01 PM

Looking forward to seeing this fix as well.

ronnieredd · Sep 22, 2012, 6:59 PM

FYI: Widget issue:

Warning: Invalid argument supplied for foreach() in /usr/local/www/widgets/widgets/snort_alerts.widget.php on line 36

is still there.

digdug3 · Sep 24, 2012, 1:03 PM

The 03-08 fix still not has been pulled…

If you have the error you have to fix it manually with the latest fix I sended 03-08-2012.
The file /usr/local/www/widgets/snort_alerts.widget.php should contain "mod 03-08-2012" at line 5.

_igor_ · Nov 28, 2012, 11:23 PM

Date today: 12-11-29: Fix is not merged into the package. Seems to be like no (or very small) interest to fix it?????