/**
* Process results from IDS scan.
*
* @param IDS_Init $init PHPIDS init object reference.
* @param IDS_Report $result The result object from PHPIDS.
*
* @return void
*/
private function _processIdsResult(IDS_Init $init, IDS_Report $result)
{
// $result contains any suspicious fields enriched with additional info
// Note: it is moreover possible to dump this information by simply doing
//"echo $result", calling the IDS_Report::$this->__toString() method implicitely.
$requestImpact = $result->getImpact();
if ($requestImpact < 1) {
// nothing to do
return;
}
// update total session impact to track an attackers activity for some time
$sessionImpact = SessionUtil::getVar('idsImpact', 0) + $requestImpact;
SessionUtil::setVar('idsImpact', $sessionImpact);
// let's see which impact mode we are using
$idsImpactMode = System::getVar('idsimpactmode', 1);
$idsImpactFactor = 1;
if ($idsImpactMode == 1) {
$idsImpactFactor = 1;
} elseif ($idsImpactMode == 2) {
$idsImpactFactor = 10;
} elseif ($idsImpactMode == 3) {
$idsImpactFactor = 5;
}
// determine our impact threshold values
$impactThresholdOne = System::getVar('idsimpactthresholdone', 1) * $idsImpactFactor;
$impactThresholdTwo = System::getVar('idsimpactthresholdtwo', 10) * $idsImpactFactor;
$impactThresholdThree = System::getVar('idsimpactthresholdthree', 25) * $idsImpactFactor;
$impactThresholdFour = System::getVar('idsimpactthresholdfour', 75) * $idsImpactFactor;
$usedImpact = ($idsImpactMode == 1) ? $requestImpact : $sessionImpact;
// react according to given impact
if ($usedImpact > $impactThresholdOne) {
// db logging
// determine IP address of current user
$_REMOTE_ADDR = System::serverGetVar('REMOTE_ADDR');
$_HTTP_X_FORWARDED_FOR = System::serverGetVar('HTTP_X_FORWARDED_FOR');
$ipAddress = ($_HTTP_X_FORWARDED_FOR) ? $_HTTP_X_FORWARDED_FOR : $_REMOTE_ADDR;
$currentPage = System::getCurrentUri();
$currentUid = UserUtil::getVar('uid');
$intrusionItems = array();
foreach ($result as $event) {
$eventName = $event->getName();
$malVar = explode(".", $eventName, 2);
$filters = array();
foreach ($event as $filter) {
array_push($filters, array(
'id' => $filter->getId(),
'description' => $filter->getDescription(),
'impact' => $filter->getImpact(),
'tags' => $filter->getTags(),
'rule' => $filter->getRule()));
}
$tagVal = $malVar[1];
$newIntrusionItem = array(
'name' => array($eventName),
'tag' => $tagVal,
'value' => $event->getValue(),
'page' => $currentPage,
'uid' => $currentUid,
'ip' => $ipAddress,
'impact' => $result->getImpact(),
'filters' => serialize($filters),
'date' => DateUtil::getDatetime()
);
if (array_key_exists($tagVal, $intrusionItems)) {
$intrusionItems[$tagVal]['name'][] = $newIntrusionItem['name'][0];
} else {
$intrusionItems[$tagVal] = $newIntrusionItem;
}
}
// log details to database
foreach ($intrusionItems as $tag => $intrusionItem) {
$intrusionItem['name'] = implode(", ", $intrusionItem['name']);
// create new ZIntrusion instance
$obj = new SecurityCenter_DBObject_Intrusion();
// set data
$obj->setData($intrusionItem);
// save object to db
$obj->save();
}
}
if (System::getVar('idsmail') && ($usedImpact > $impactThresholdTwo)) {
// mail admin
// prepare mail text
$mailBody = __('The following attack has been detected by PHPIDS') . "\n\n";
$mailBody .= __f('IP: %s', $ipAddress) . "\n";
$mailBody .= __f('UserID: %s', $currentUid) . "\n";
$mailBody .= __f('Date: %s', DateUtil::strftime(__('%b %d, %Y'), (time()))) . "\n";
if ($idsImpactMode == 1) {
$mailBody .= __f('Request Impact: %d', $requestImpact) . "\n";
} else {
$mailBody .= __f('Session Impact: %d', $sessionImpact) . "\n";
}
$mailBody .= __f('Affected tags: %s', join(' ', $result->getTags())) . "\n";
$attackedParameters = '';
foreach ($result as $event) {
$attackedParameters .= $event->getName() . '=' . urlencode($event->getValue()) . ", ";
}
$mailBody .= __f('Affected parameters: %s', trim($attackedParameters)) . "\n";
$mailBody .= __f('Request URI: %s', urlencode($currentPage));
// prepare other mail arguments
$siteName = System::getVar('sitename');
$adminmail = System::getVar('adminmail');
$mailTitle = __('Intrusion attempt detected by PHPIDS');
if (ModUtil::available('Mailer')) {
$args = array();
$args['fromname'] = $siteName;
$args['fromaddress'] = $adminmail;
$args['toname'] = 'Site Administrator';
$args['toaddress'] = $adminmail;
$args['subject'] = $mailTitle;
$args['body'] = $mailBody;
$rc = ModUtil::apiFunc('Mailer', 'user', 'sendmessage', $args);
} else {
$headers = "From: $siteName <$adminmail>\n"
."X-Priority: 1 (Highest)";
System::mail($adminmail, $mailTitle, $mailBody, $headers);
}
}
if ($usedImpact > $impactThresholdThree) {
// block request
if (System::getVar('idssoftblock')) {
// warn only for debugging the ruleset
LogUtil::registerError(__('Malicious request code / a hacking attempt was detected. This request has NOT been blocked!'));
} else {
throw new Zikula_Exception_Forbidden(__('Malicious request code / a hacking attempt was detected. Thus this request has been blocked.'), null, $result);
}
}
return;
}
