rootkit_detection.php

<?php /*

 ocPortal
 Copyright (c) ocProducts, 2004-2012

 See text/EN/licence.txt for full licencing information.

*/

/**
 * @license		http://opensource.org/licenses/cpal_1.0 Common Public Attribution License
 * @copyright	ocProducts Ltd
 * @package		rootkit_detector
 */

// Find ocPortal base directory, and chdir into it
global $FILE_BASE,$RELATIVE_PATH;
$FILE_BASE=(strpos(__FILE__,'./')===false)?__FILE__:realpath(__FILE__);
$FILE_BASE=dirname($FILE_BASE);
if (!is_file($FILE_BASE.'/sources/global.php')) // Need to navigate up a level further perhaps?
{
	$RELATIVE_PATH=basename($FILE_BASE);
	$FILE_BASE=dirname($FILE_BASE);
} else
{
	$RELATIVE_PATH='';
}
@chdir($FILE_BASE);

if (!function_exists('mysql_connect')) echo 'MySQL extension needed';
// To make Code Quality Checker pass
if (!function_exists('mysql_connect')) return;
if (!function_exists('mysql_select_db')) return;
if (!function_exists('mysql_query')) return;
if (!function_exists('mysql_fetch_assoc')) return;

$type=isset($_GET['type'])?$_GET['type']:'';

rd_do_header();

if ($type=='')
{
	echo <<<END
		<p>Be warned that this is a tool for experts, who wish to take active extra measures to make sure their website is not hacked against their knowledge. This is the most ominous security problem for many, because it means that their own website could be spreading customer information or compromised software downloads. When we say this script is for experts, we mean it - this script is strictly separated from any other ocPortal file and thus stands alone without access to our quality and standards frameworks.</p>
		<p>This detector will provide you with a portion of text that identifies the state of the most critical areas of ocPortal. You can then take the text, and save it in a file on your computer. You then run this tool again at a later date and use a tool such as <a href="http://winmerge.sourceforge.net/">WinMerge</a> to compare the results - seeing what has changed.</p>
		<p>This tool will not find out if areas of your site have been vandalised, because there is way too much information to scan and present for that to be viable. Instead, it focuses on compromised file systems, ocPortal permissions, and database-stored PHP/OcCLE-Code. It only checks staff settings on the local OCF, not on any other foreign forum.</p>
		<p>It is important that you upload a new copy of this script before you run it, in case this script itself has been compromised.</p>
		<p>This script may take some time to run, as it computes hashes over a large number of files. It requires PHP 4.2.0 or higher, as well as the 'mysql' module for usage on a mySQL database. If a different database is being used, then custom changes will be required to this script.</p>
		<p>This script cannot extract database access details from your config file because the config file itself (which is an executable file for ocPortal) may have been configured to give out fake details to this script. Therefore you will need to enter them here, and the config file will only be used for accessing the ocPortal password (which will be extracted using a non-executive method).</p>

		<div>
			<p>ocPortal master password: <input type="password" name="password" /></p>
			<p>Database host: <input type="text" name="db_host" value="localhost" /></p>
			<p>Database name: <input type="text" name="db_name" value="ocf" /></p>
			<p>Database table prefix: <input type="text" name="db_prefix" value="ocp_" /></p>
			<p>Database username: <input type="text" name="db_user" value="root" /></p>
			<p>Database password: <input type="password" name="db_pass" /></p>

			<input type="submit" value="Begin" />
		</div>
END;
} else
{
	if (get_magic_quotes_gpc())
	{
		foreach ($_POST as $key=>$val)
		{
			$_POST[$key]=stripslashes($val);
		}
	}

	$info_file=file_get_contents('info.php');
	$matches=array();
	if (preg_match('#\$SITE_INFO\[\'admin_password\'\]=\'([^\']*)\';#',$info_file,$matches)==0) exit(':(');
	global $SITE_INFO;
	$SITE_INFO=array('admin_password'=>$matches[1]);
	if (!rk_check_master_password($_POST['password']))
	{
		echo '<p>Incorrect master password</p>';
		rd_do_footer();
		exit();
	}

	$db=mysql_connect($_POST['db_host'],$_POST['db_user'],$_POST['db_pass']);
	if ($db===false)
	{
		echo '<p>Could not connect (1)</p>';
		rd_do_footer();
		exit();
	}
	if (!mysql_select_db($_POST['db_name'],$db))
	{
		echo '<p>Could not connect (2)</p>';
		rd_do_footer();
		exit();
	}

	$results='';

	// Check database
	$prefix=$_POST['db_prefix'];
	if (file_exists($FILE_BASE.'/sources/hooks/systems/addon_registry/calendar_events.php'))
	{
		$r=mysql_query('SELECT * FROM '.$prefix.'calendar_events e LEFT JOIN '.$prefix.'translate t on e.e_content=t.id WHERE e_type=1 ORDER BY e.id',$db);
		if ($r!==false)
		{
			while (($row=mysql_fetch_assoc($r))!==false)
			{
				$results.="Cronjob: {$row['id']}=".md5($row['text_original'])."\n";
			}
		}
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'config WHERE config_value IS NULL ORDER BY the_name',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="Executable-config-option: {$row['the_name']}=".$row['eval']."\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'f_groups WHERE g_is_super_admin=1 OR g_is_super_moderator=1 ORDER BY id',$db);
	$staff_groups=array();
	$pg='';
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		if ($pg!='') $pg.=' OR ';
		$pg.='m_primary_group='.strval($row['id']);
		$staff_groups[]=$row['id'];
		$results.="Staff-group: {$row['id']}=N/A\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'f_members WHERE '.$pg.' ORDER BY id',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="In-staff-group (primary): {$row['id']}=N/A\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'f_group_members WHERE ('.str_replace('m_primary_group','gm_group_id',$pg).') AND gm_validated=1 ORDER BY gm_member_id',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="In-staff-group (secondary): {$row['gm_member_id']}=N/A\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'group_zone_access WHERE zone_name=\'cms\' OR zone_name=\'adminzone\' OR zone_name=\'collaboration\' ORDER BY zone_name,group_id',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="Zone-access: {$row['zone_name']}/{$row['group_id']}=N/A\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'gsp WHERE the_value=1 ORDER BY specific_permission,the_page,module_the_name,category_name,group_id',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="Privileges: {$row['specific_permission']}/{$row['the_page']}/{$row['module_the_name']}/{$row['category_name']}/{$row['group_id']}={$row['the_value']}\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'member_zone_access WHERE zone_name=\'cms\' OR zone_name=\'adminzone\' OR zone_name=\'collaboration\' ORDER BY zone_name,member_id',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="Member-Zone-access: {$row['zone_name']}/{$row['member_id']}=N/A\n";
	}
	$r=mysql_query('SELECT * FROM '.$prefix.'msp WHERE the_value=1 ORDER BY specific_permission,the_page,module_the_name,category_name,member_id',$db);
	while (($row=mysql_fetch_assoc($r))!==false)
	{
		$results.="Member-Privileges: {$row['specific_permission']}/{$row['the_page']}/{$row['module_the_name']}/{$row['category_name']}/{$row['member_id']}={$row['the_value']}\n";
	}

	// Check files
	if (function_exists('set_time_limit')) @set_time_limit(0);
	$files=rd_do_dir('');
	foreach ($files as $file)
	{
		if (filesize($GLOBALS['FILE_BASE'].'/'.$file)!=0)
		{
			$results.='File: '.$file.'=';
			if (function_exists('md5_file'))
			{
				$results.=md5_file($GLOBALS['FILE_BASE'].'/'.$file);
			} else
			{
				$data='';
				$myfile=@fopen($GLOBALS['FILE_BASE'].'/'.$file,'rb');
				if ($file!==false)
				{
					while (!feof($myfile)) $data.=fread($myfile,1024);
					fclose($myfile);
				}
				$results.=md5($data);
			}
			$results.="\n";
		}
	}

	echo <<<END
		<p>This is the result of the scan. Please save this to your own computer somewhere secure, and if you have run this tool previously, run a diff between those results and these. It is up to you to interpret the results - basically the diff will tell you what has been added and changed, and if you see anything you cannot fully explain, you may wish to investigate. This tool has been designed to empower, and to some extent promote secure practice, but it is only really useful in expert hands (there's no point ocProducts making it easier, as the security principles and analysis involved require expert knowledge in themself).</p>
		<textarea style="width: 100%" rows="30" cols="100" name="results">{$results}</textarea>
END;
}

rd_do_footer();

/**
 * Search inside a directory for files.
 *
 * @param  SHORT_TEXT	The directory path to search.
 * @return array			The HTML for the list box selection.
 */
function rd_do_dir($dir)
{
	$out=array();
	$_dir=($dir=='')?'.':$dir;
	$dh=@opendir($_dir);
	if ($dh!==false)
	{
		while (($file=readdir($dh))!==false)
		{
			if (!in_array($file,array('.','..','website_specific')))
			{
				if (is_file($_dir.'/'.$file))
				{
					$path=$dir.(($dir!='')?'/':'').$file;
					if (substr($path,-4)=='.php')
						$out[]=$path;
				} elseif (is_dir($_dir.'/'.$file))
				{
					$out=array_merge($out,rd_do_dir($dir.(($dir!='')?'/':'').$file));
				}
			}
		}
	}
	return $out;
}

/**
 * Output the config editors page header.
 */
function rd_do_header()
{
	echo <<<END
<!DOCTYPE html>
	<html lang="EN">
	<head>
		<title>ocPortal rootkit detector</title>
		<link rel="icon" href="http://ocportal.com/favicon.ico" type="image/x-icon" />
		<style type="text/css">/*<![CDATA[*/
END;
@print(preg_replace('#/\*\s*\*/\s*#','',str_replace('url(\'\')','none',str_replace('url("")','none',preg_replace('#\{\$[^\}]*\}#','',file_get_contents($GLOBALS['FILE_BASE'].'/themes/default/css/global.css'))))));
echo <<<END
			.screen_title { text-decoration: underline; display: block; background: url('themes/default/images/bigicons/ocp-logo.png') top left no-repeat; min-height: 42px; padding: 3px 0 0 60px; }
			a[target="_blank"], a[onclick$="window.open"] { padding-right: 0; }
		/*]]>*/</style>
	</head>
	<body class="website_body" style="margin: 1em"><div class="global_middle">
		<h1 class="screen_title">ocPortal rootkit detector</h1>
		<form title="Proceed" action="rootkit_detection.php?type=go" method="post">
END;
}

/**
 * Output the config editors page footer.
 */
function rd_do_footer()
{
	echo <<<END
		</form>
	</div></body>
</html>
END;
}

/**
 * Check the given master password is valid.
 *
 * @param  SHORT_TEXT	Given master password
 * @return boolean		Whether it is valid
 */
function rk_check_master_password($password_given)
{
	global $SITE_INFO;
	if (!array_key_exists('admin_password',$SITE_INFO)) exit('No master password defined in info.php currently so cannot authenticate');
	$actual_password_hashed=$SITE_INFO['admin_password'];
	$salt='';
	if ((substr($actual_password_hashed,0,1)=='!') && (strlen($actual_password_hashed)==33))
	{
		$actual_password_hashed=substr($actual_password_hashed,1);
		$salt='ocp';
	}
	return (((strlen($password_given)!=32) && ($actual_password_hashed==$password_given)) || ($actual_password_hashed==md5($password_given.$salt)));
}