Current Directory: /home/astoriaah/www/old15/plugins/system/admintools/util
Viewing File: /home/astoriaah/www/old15/plugins/system/admintools/util/exceptionshandler.php
<?php
/**
* @package AdminTools
* @copyright Copyright (c)2010-2015 Nicholas K. Dionysopoulos
* @license GNU General Public License version 3, or later
*/
defined('_JEXEC') or die;
class AtsystemUtilExceptionshandler
{
/** @var JRegistry Plugin parameters */
protected $params = null;
/** @var AdmintoolsModelStorage Component parameters */
protected $cparams = null;
public function __construct(JRegistry &$params, AdmintoolsModelStorage &$cparams)
{
$this->params = $params;
$this->cparams = $cparams;
}
/**
* Logs security exceptions and processes the IP auto-ban for this IP
*
* @param string $reason Block reason code
* @param string $extraLogInformation Extra information to be written to the text log file
* @param string $extraLogTableInformation Extra information to be written to the extradata field of the log table (useful for JSON format)
*
* @return bool
*/
public function logAndAutoban($reason, $extraLogInformation = '', $extraLogTableInformation = '')
{
$ret = $this->logBreaches($reason, $extraLogInformation, $extraLogTableInformation);
$autoban = $this->cparams->getValue('tsrenable', 0);
if ($autoban)
{
$this->autoBan($reason);
}
return $ret;
}
/**
* Blocks the request in progress and, optionally, logs the details of the
* blocked request for the admin to review later
*
* @param string $reason Block reason code
* @param string $message The message to be shown to the user
* @param string $extraLogInformation Extra information to be written to the text log file
* @param string $extraLogTableInformation Extra information to be written to the extradata field of the log table (useful for JSON format)
*
* @throws Exception
*/
public function blockRequest($reason = 'other', $message = '', $extraLogInformation = '', $extraLogTableInformation = '')
{
if (empty($message))
{
$customMessage = $this->cparams->getValue('custom403msg', '');
if (!empty($customMessage))
{
$message = $customMessage;
}
else
{
$message = 'ADMINTOOLS_BLOCKED_MESSAGE';
}
}
$r = $this->logBreaches($reason, $extraLogInformation, $extraLogTableInformation);
if (!$r)
{
return;
}
$autoban = $this->cparams->getValue('tsrenable', 0);
if ($autoban)
{
$this->autoBan($reason);
}
// Merge the default translation with the current translation
$jlang = JFactory::getLanguage();
// Front-end translation
$jlang->load('plg_system_admintools', JPATH_ADMINISTRATOR, 'en-GB', true);
$jlang->load('plg_system_admintools', JPATH_ADMINISTRATOR, $jlang->getDefault(), true);
$jlang->load('plg_system_admintools', JPATH_ADMINISTRATOR, null, true);
if ((JText::_('ADMINTOOLS_BLOCKED_MESSAGE') == 'ADMINTOOLS_BLOCKED_MESSAGE') && ($message == 'ADMINTOOLS_BLOCKED_MESSAGE'))
{
$message = "Access Denied";
}
else
{
$message = JText::_($message);
}
// Show the 403 message
if ($this->cparams->getValue('use403view', 0))
{
// Using a view
if (!JFactory::getSession()->get('block', false, 'com_admintools'))
{
// This is inside an if-block so that we don't end up in an infinite rediretion loop
JFactory::getSession()->set('block', true, 'com_admintools');
JFactory::getSession()->set('message', $message, 'com_admintools');
JFactory::getSession()->close();
JFactory::getApplication()->redirect(JURI::base());
}
}
else
{
// Using Joomla!'s error page
if (version_compare(JVERSION, '3.0', 'ge'))
{
JFactory::getApplication()->input->set('template', null);
throw new Exception($message, 403);
}
else
{
JRequest::setVar('template', null);
JError::raiseError(403, $message);
}
}
}
/**
* Logs security exceptions
*
* @param string $reason Block reason code
* @param string $extraLogInformation Extra information to be written to the text log file
* @param string $extraLogTableInformation Extra information to be written to the extradata field of the log table (useful for JSON format)
*
* @return bool
*/
public function logBreaches($reason, $extraLogInformation = '', $extraLogTableInformation = '')
{
$reasons_nolog = $this->cparams->getValue('reasons_nolog', 'geoblocking');
$reasons_noemail = $this->cparams->getValue('reasons_noemail', 'geoblocking');
$whitelist_domains = $this->cparams->getValue('whitelist_domains', '.googlebot.com,.search.msn.com');
$reasons_nolog = explode(',', $reasons_nolog);
$reasons_noemail = explode(',', $reasons_noemail);
$whitelist_domains = explode(',', $whitelist_domains);
// === SANITY CHECK - BEGIN ===
// Get our IP address
$ip = AtsystemUtilFilter::getIp();
if ((strpos($ip, '::') === 0) && (strstr($ip, '.') !== false))
{
$ip = substr($ip, strrpos($ip, ':') + 1);
}
// No point continuing if we can't get an address, right?
if (empty($ip) || ($ip == '0.0.0.0'))
{
return false;
}
// Make sure it's not an IP in the safe list
$safeIPs = $this->cparams->getValue('neverblockips', '');
if (!empty($safeIPs))
{
$safeIPs = explode(',', $safeIPs);
if (!empty($safeIPs))
{
if (AtsystemUtilFilter::IPinList($safeIPs))
{
return false;
}
}
}
// Make sure we don't have a list in the administrator white list
if ($this->cparams->getValue('ipwl', 0) == 1)
{
$db = JFactory::getDBO();
$sql = $db->getQuery(true)
->select($db->qn('ip'))
->from($db->qn('#__admintools_adminiplist'));
$db->setQuery($sql);
try
{
if (version_compare(JVERSION, '3.0', 'ge'))
{
$ipTable = $db->loadColumn();
}
else
{
$ipTable = $db->loadResultArray();
}
}
catch (Exception $e)
{
$ipTable = null;
}
if (!empty($ipTable))
{
if (AtsystemUtilFilter::IPinList($ipTable))
{
return false;
}
}
}
// Make sure this IP doesn't resolve to a whitelisted domain
if (!empty($whitelist_domains))
{
$remote_domain = @gethostbyaddr($ip);
if (!empty($remote_domain))
{
foreach ($whitelist_domains as $domain)
{
$domain = trim($domain);
if (strrpos($remote_domain, $domain) !== false)
{
return true;
}
}
}
}
// === SANITY CHECK - END ===
// DO I have any kind of log? Let's get some extra info
if (
($this->cparams->getValue('logbreaches', 0) && !in_array($reason, $reasons_nolog)) ||
($this->cparams->getValue('emailbreaches', '') && !in_array($reason, $reasons_noemail))
)
{
$uri = JURI::getInstance();
$url = $uri->toString(array('scheme', 'user', 'pass', 'host', 'port', 'path', 'query', 'fragment'));
JLoader::import('joomla.utilities.date');
$date = new JDate();
$user = JFactory::getUser();
if ($user->guest)
{
$username = 'Guest';
}
else
{
$username = $user->username . ' (' . $user->name . ' <' . $user->email . '>)';
}
$country = '';
$continent = '';
if (class_exists('AkeebaGeoipProvider'))
{
$geoip = new AkeebaGeoipProvider();
$country = $geoip->getCountryCode($ip);
$continent = $geoip->getContinent($ip);
}
if (empty($country))
{
$country = '(unknown country)';
}
if (empty($continent))
{
$continent = '(unknown continent)';
}
}
if ($this->cparams->getValue('logbreaches', 0) && !in_array($reason, $reasons_nolog))
{
// Logging to file
$config = JFactory::getConfig();
if (version_compare(JVERSION, '3.0', 'ge'))
{
$logpath = $config->get('log_path');
}
else
{
$logpath = $config->getValue('log_path');
}
$fname = $logpath . DIRECTORY_SEPARATOR . 'admintools_breaches.log';
// -- Check the file size. If it's over 1Mb, archive and start a new log.
if (@file_exists($fname))
{
$fsize = filesize($fname);
if ($fsize > 1048756)
{
if (@file_exists($fname . '.1'))
{
unlink($fname . '.1');
}
@copy($fname, $fname . '.1');
@unlink($fname);
}
}
// -- Log the exception
$fp = @fopen($fname, 'at');
if ($fp !== false)
{
fwrite($fp, str_repeat('-', 79) . "\n");
fwrite($fp, "Blocking reason: " . $reason . "\n" . str_repeat('-', 79) . "\n");
fwrite($fp, 'Date/time : ' . gmdate('Y-m-d H:i:s') . " GMT\n");
fwrite($fp, 'URL : ' . $url . "\n");
fwrite($fp, 'User : ' . $username . "\n");
fwrite($fp, 'IP : ' . $ip . "\n");
fwrite($fp, 'Country : ' . $country . "\n");
fwrite($fp, 'Continent : ' . $continent . "\n");
fwrite($fp, 'UA : ' . $_SERVER['HTTP_USER_AGENT'] . "\n");
if (!empty($extraLogInformation))
{
fwrite($fp, $extraLogInformation . "\n");
}
fwrite($fp, "\n\n");
fclose($fp);
}
// ...and write a record to the log table
$db = JFactory::getDBO();
$logEntry = (object)array(
'logdate' => $date->toSql(),
'ip' => $ip,
'url' => $url,
'reason' => $reason,
'extradata' => $extraLogTableInformation,
);
try
{
$db->insertObject('#__admintools_log', $logEntry);
}
catch (Exception $e)
{
// Do nothing if the query fails
}
}
$emailbreaches = $this->cparams->getValue('emailbreaches', '');
if (!empty($emailbreaches) && !in_array($reason, $reasons_noemail))
{
// Load the component's administrator translation files
$jlang = JFactory::getLanguage();
$jlang->load('com_admintools', JPATH_ADMINISTRATOR, 'en-GB', true);
$jlang->load('com_admintools', JPATH_ADMINISTRATOR, $jlang->getDefault(), true);
$jlang->load('com_admintools', JPATH_ADMINISTRATOR, null, true);
// Get the site name
$config = JFactory::getConfig();
if (version_compare(JVERSION, '3.0', 'ge'))
{
$sitename = $config->get('sitename');
}
else
{
$sitename = $config->getValue('config.sitename');
}
// Create a link to lookup the IP
$ip_link = $this->cparams->getValue('iplookupscheme', 'http') . '://' . $this->cparams->getValue('iplookup', 'ip-lookup.net/index.php?ip={ip}');
$ip_link = str_replace('{ip}', $ip, $ip_link);
// Get the reason in human readable format
$txtReason = JText::_('ATOOLS_LBL_REASON_' . strtoupper($reason));
// Get extra information
if ($extraLogTableInformation)
{
list($logReason,) = explode('|', $extraLogTableInformation);
$txtReason .= " ($logReason)";
}
// Send the email
$mailer = JFactory::getMailer();
if (version_compare(JVERSION, '3.0', 'ge'))
{
$mailfrom = $config->get('mailfrom');
$fromname = $config->get('fromname');
}
else
{
$mailfrom = $config->getValue('config.mailfrom');
$fromname = $config->getValue('config.fromname');
}
// Let's get the most suitable email template
$template = $this->getEmailTemplate($reason);
// Got no template, the user didn't published any email template, or the template doesn't want us to
// send a notification email. Anyway, let's stop here
if (!$template)
{
return true;
}
else
{
$subject = $template[0];
$body = $template[1];
}
$tokens = array(
'[SITENAME]' => $sitename,
'[REASON]' => $txtReason,
'[DATE]' => gmdate('Y-m-d H:i:s') . " GMT",
'[URL]' => $url,
'[USER]' => $username,
'[IP]' => $ip,
'[LOOKUP]' => '<a href="' . $ip_link . '">IP Lookup</a>',
'[COUNTRY]' => $country,
'[CONTINENT]' => $continent,
'[UA]' => $_SERVER['HTTP_USER_AGENT']
);
$subject = str_replace(array_keys($tokens), array_values($tokens), $subject);
$body = str_replace(array_keys($tokens), array_values($tokens), $body);
$recipients = explode(',', $emailbreaches);
$recipients = array_map('trim', $recipients);
foreach ($recipients as $recipient)
{
$mailer->isHtml(true);
$mailer->setSender(array($mailfrom, $fromname));
$mailer->addRecipient($recipient);
$mailer->setSubject($subject);
$mailer->setBody($body);
$mailer->Send();
}
}
return true;
}
/**
* Checks if an IP address should be automatically banned for raising too many security exceptions over a predefined
* time period.
*
* @param string $reason The reason of the ban
*
* @return void
*/
public function autoBan($reason = 'other')
{
// We need to be able to get our own IP, right?
if (!function_exists('inet_pton'))
{
return;
}
// Get the IP
$ip = AtsystemUtilFilter::getIp();
// No point continuing if we can't get an address, right?
if (empty($ip) || ($ip == '0.0.0.0'))
{
return;
}
// Check for repeat offenses
$db = JFactory::getDBO();
$strikes = $this->cparams->getValue('tsrstrikes', 3);
$numfreq = $this->cparams->getValue('tsrnumfreq', 1);
$frequency = $this->cparams->getValue('tsrfrequency', 'hour');
$mindatestamp = 0;
switch ($frequency)
{
case 'second':
break;
case 'minute':
$numfreq *= 60;
break;
case 'hour':
$numfreq *= 3600;
break;
case 'day':
$numfreq *= 86400;
break;
case 'ever':
$mindatestamp = 946706400; // January 1st, 2000
break;
}
JLoader::import('joomla.utilities.date');
$jNow = new JDate();
if ($mindatestamp == 0)
{
$mindatestamp = $jNow->toUnix() - $numfreq;
}
$jMinDate = new JDate($mindatestamp);
$minDate = $jMinDate->toSql();
$sql = $db->getQuery(true)
->select('COUNT(*)')
->from($db->qn('#__admintools_log'))
->where($db->qn('logdate') . ' >= ' . $db->q($minDate))
->where($db->qn('ip') . ' = ' . $db->q($ip));
$db->setQuery($sql);
try
{
$numOffenses = $db->loadResult();
}
catch (Exception $e)
{
$numOffenses = 0;
}
if ($numOffenses < $strikes)
{
return;
}
// Block the IP
$myIP = @inet_pton($ip);
if ($myIP === false)
{
return;
}
$myIP = inet_ntop($myIP);
$until = $jNow->toUnix();
$numfreq = $this->cparams->getValue('tsrbannum', 1);
$frequency = $this->cparams->getValue('tsrbanfrequency', 'hour');
switch ($frequency)
{
case 'second':
$until += $numfreq;
break;
case 'minute':
$numfreq *= 60;
$until += $numfreq;
break;
case 'hour':
$numfreq *= 3600;
$until += $numfreq;
break;
case 'day':
$numfreq *= 86400;
$until += $numfreq;
break;
case 'ever':
$until = 2145938400; // January 1st, 2038 (mind you, UNIX epoch runs out on January 19, 2038!)
break;
}
JLoader::import('joomla.utilities.date');
$jMinDate = new JDate($until);
$minDate = $jMinDate->toSql();
$record = (object)array(
'ip' => $myIP,
'reason' => $reason,
'until' => $minDate
);
// If I'm here it means that we have to ban the user. Let's see if this is a simple autoban or
// we have to issue a permaban as a result of several attacks
if ($this->cparams->getValue('permaban', 0))
{
// Ok I have to check the number of autoban
$query = $db->getQuery(true)
->select('COUNT(*)')
->from($db->qn('#__admintools_ipautobanhistory'))
->where($db->qn('ip') . ' = ' . $db->q($myIP));
try
{
$bans = $db->setQuery($query)->loadResult();
}
catch (Exception $e)
{
$bans = 0;
}
$limit = (int)$this->cparams->getValue('permabannum', 0);
if ($limit && ($bans >= $limit))
{
$block = (object)array(
'ip' => $myIP,
'description' => 'IP automatically blocked after being banned automatically ' . $bans . ' times'
);
$db->insertObject('#__admintools_ipblock', $block);
}
}
$db->insertObject('#__admintools_ipautoban', $record);
// Send an optional email
if ($this->cparams->getValue('emailafteripautoban', ''))
{
// Get the site name
$config = JFactory::getConfig();
if (version_compare(JVERSION, '3.0', 'ge'))
{
$sitename = $config->get('sitename');
}
else
{
$sitename = $config->getValue('config.sitename');
}
$substitutions = array(
'[SITENAME]' => $sitename,
'[IP]' => $myIP,
'[UNTIL]' => $minDate
);
// Load the component's administrator translation files
$jlang = JFactory::getLanguage();
$jlang->load('com_admintools', JPATH_ADMINISTRATOR, 'en-GB', true);
$jlang->load('com_admintools', JPATH_ADMINISTRATOR, $jlang->getDefault(), true);
$jlang->load('com_admintools', JPATH_ADMINISTRATOR, null, true);
$subject = JText::_('ATOOLS_LBL_WAF_AUTOIPBLOCKEMAIL_SUBJECT');
$body = JText::_('ATOOLS_LBL_WAF_AUTOIPBLOCKEMAIL_BODY');
foreach ($substitutions as $k => $v)
{
$subject = str_replace($k, $v, $subject);
$body = str_replace($k, $v, $body);
}
// Send the email
$mailer = JFactory::getMailer();
if (version_compare(JVERSION, '3.0', 'ge'))
{
$mailfrom = $config->get('mailfrom');
$fromname = $config->get('fromname');
}
else
{
$mailfrom = $config->getValue('config.mailfrom');
$fromname = $config->getValue('config.fromname');
}
$mailer->setSender(array($mailfrom, $fromname));
$mailer->addRecipient($this->cparams->getValue('emailafteripautoban', ''));
$mailer->setSubject($subject);
$mailer->setBody($body);
$mailer->Send();
}
}
/**
* Gets the email template for a specific security exception reason
*
* @param string $reason The security exception reason for which to fetch the email template
*
* @return array
*/
public function getEmailTemplate($reason)
{
// Let's get the subject and the body from email templates
$jlang = JFactory::getLanguage();
$db = JFactory::getDbo();
$languages = array($db->q('*'), $db->q('en-GB'), $db->q($jlang->getDefault()));
$stack = array();
$query = $db->getQuery(true)
->select('*')
->from($db->qn('#__admintools_waftemplates'))
->where($db->qn('reason') . ' IN(' . $db->q($reason) . ', ' . $db->q('all') . ')')
->where($db->qn('language') . ' IN(' . implode(',', $languages) . ')')
->where($db->qn('enabled') . ' = ' . $db->q('1'));
try
{
$templates = $db->setQuery($query)->loadObjectList();
}
catch (Exception $e)
{
return array();
}
foreach ($templates as $template)
{
$score = 0;
if ($template->reason == $reason)
{
$score += 10;
}
if ($template->language == $jlang->getDefault())
{
$score += 10;
}
elseif ($template->language == '*')
{
$score += 5;
}
elseif ($template->language == 'en-GB')
{
$score += 1;
}
$stack[$score] = $template;
}
ksort($stack);
$best = array_pop($stack);
if (!$best)
{
return array();
}
if ($this->cparams->getValue('email_throttle', 1))
{
// Ok I found out the best template, HOWEVER, should I really send out an email? Let's do some checks vs frequency limits
$emails = $best->email_num ? $best->email_num : 5;
$numfreq = $best->email_numfreq ? $best->email_numfreq : 1;
$frequency = $best->email_freq ? $best->email_freq : 'hour';
$mindatestamp = 0;
switch ($frequency)
{
case 'second':
break;
case 'minute':
$numfreq *= 60;
break;
case 'hour':
$numfreq *= 3600;
break;
case 'day':
$numfreq *= 86400;
break;
case 'ever':
$mindatestamp = 946706400; // January 1st, 2000
break;
}
JLoader::import('joomla.utilities.date');
$jNow = new JDate();
if ($mindatestamp == 0)
{
$mindatestamp = $jNow->toUnix() - $numfreq;
}
$jMinDate = new JDate($mindatestamp);
$minDate = $jMinDate->toSql();
$sql = $db->getQuery(true)
->select('COUNT(*)')
->from($db->qn('#__admintools_log'))
->where($db->qn('logdate') . ' >= ' . $db->q($minDate))
->where($db->qn('reason') . ' = ' . $db->q($reason));
$db->setQuery($sql);
try
{
$numOffenses = $db->loadResult();
}
catch (Exception $e)
{
$numOffenses = 0;
}
if ($numOffenses > $emails)
{
return array();
}
}
return array(
$best->subject,
$best->template
);
}
}