X-Git-Url: https://delta.frontaccounting.com/gitweb/?a=blobdiff_plain;f=includes%2Fsession.inc;h=37591d3489e8bdbceffdb78b28eece26c6053966;hb=063c5f22068dbbd6adccacaf5bd0f66b2eda8e4f;hp=81e743c8fbc0757a621139c729837b9c5bfe5b8b;hpb=e372cc12091663d268b7ec9947df02567466a428;p=fa-stable.git

diff --git a/includes/session.inc b/includes/session.inc
index 81e743c8..37591d34 100644
--- a/includes/session.inc
+++ b/includes/session.inc
@@ -77,7 +77,6 @@ class SessionManager
 
 		// Create new session without destroying the old one
 		session_regenerate_id();
- 
 		// Grab current session ID and close both sessions to allow other scripts to use them
 		$newSession = session_id();
 		session_write_close();
@@ -141,6 +140,58 @@ function login_fail()
 	die();
 }
 
+function check_faillog()
+{
+	global $login_delay, $login_faillog, $login_max_attempts;
+
+	$user = $_SESSION["wa_current_user"]->user;
+
+	if (@$login_delay && (@$login_faillog[$user][$_SERVER['REMOTE_ADDR']] >= @$login_max_attempts) && (time() < $login_faillog[$user]['last'] + $login_delay))
+		return true;
+
+	return false;
+}
+/*
+	Simple brute force attack detection is performed before connection to company database is open. Therefore access counters have to be stored in file.
+	Login attempts counter is created for every new user IP, which partialy prevent DOS attacks.
+*/
+function write_login_filelog($login, $result)
+{
+	global $login_faillog, $login_max_attempts, $path_to_root;
+
+	$user = $_SESSION["wa_current_user"]->user;
+
+	$ip = $_SERVER['REMOTE_ADDR'];
+
+	if (!isset($login_faillog[$user][$ip]) || $result) // init or reset on successfull login
+		$login_faillog[$user] = array($ip => 0, 'last' => '');
+
+ 	if (!$result)
+	{
+		if ($login_faillog[$user][$ip] < @$login_max_attempts) {
+
+ 			$login_faillog[$user][$ip]++;
+ 		} else {
+ 			$login_faillog[$user][$ip] = 0; // comment out to restart counter only after successfull login.
+	 		error_log(sprintf(_("Brute force attack on account '%s' detected. Access for non-logged users temporarily blocked."	), $login));
+	 	}
+ 		$login_faillog[$user]['last'] = time();
+	}
+
+	$msg = "<?php\n";
+	$msg .= "/*\n";
+	$msg .= "Login attempts info.\n";
+	$msg .= "*/\n";
+	$msg .= "\$login_faillog = " .var_export($login_faillog, true). ";\n";
+
+	$filename = $path_to_root."/faillog.php";
+
+	if ((!file_exists($filename) && is_writable($path_to_root)) || is_writable($filename))
+	{
+		file_put_contents($filename, $msg);
+	}
+}
+
 //----------------------------------------------------------------------------------------
 
 function check_page_security($page_security)
@@ -258,6 +309,16 @@ if (!isset($path_to_root))
 	$path_to_root = ".";
 }
 
+//----------------------------------------------------------------------------------------
+// set to reasonable values if not set in config file (pre-2.3.12 installations)
+
+if ((!isset($login_delay)) || ($login_delay < 0))
+    $login_delay = 10;
+
+if ((!isset($login_max_attempts)) || ($login_max_attempts < 0))
+    $login_max_attempts = 3; 
+
+
 // Prevent register_globals vulnerability
 if (isset($_GET['path_to_root']) || isset($_POST['path_to_root']))
 	die("Restricted access");
@@ -303,6 +364,9 @@ header("Cache-control: private");
 include_once($path_to_root . "/config.php");
 get_text_init();
 
+if ($login_delay > 0)
+	@include_once($path_to_root . "/faillog.php");
+
 // Page Initialisation
 if (!isset($_SESSION['language']) || !method_exists($_SESSION['language'], 'set_language')) 
 {
@@ -387,6 +451,14 @@ if (strstr($_SERVER['PHP_SELF'], 'logout.php') == false){
 			// Incorrect password
 				login_fail();
 			}
+			elseif(!$_SESSION['timeout']['post'])
+			{
+				// in case of GET request redirect to avoid confirmation dialog 
+				// after return from menu option
+				header("HTTP 1.1 303 See Other");
+				header("Location: ".$_SESSION['timeout']['uri']);
+				exit();
+			}
 			$lang = &$_SESSION['language'];
 			$lang->set_language($_SESSION['language']->code);
 		}