paranoid option to reduce session hijacking by enforcing an IP match on session validation. This is not claimed to be a perfect solution to the problem by any stretch, it merely raises the bar on the script kiddies to the detriment of those whose dynamic IPs aren't long lived. For these reasons it is opt-in.
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1 changed files with 26 additions and 17 deletions
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@ -1,20 +1,29 @@
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<?php
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function nuke_session() {
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unset($_SESSION['authenticated']);
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unset($_SESSION['uid']);
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unset($_SESSION['visitor_id']);
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unset($_SESSION['administrator']);
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unset($_SESSION['cid']);
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unset($_SESSION['theme']);
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unset($_SESSION['page_flags']);
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}
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// login/logout
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if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-params'))) || ($_POST['auth-params'] !== 'login'))) {
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if(((x($_POST,'auth-params')) && ($_POST['auth-params'] === 'logout')) || ($a->module === 'logout')) {
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// process logout request
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unset($_SESSION['authenticated']);
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unset($_SESSION['uid']);
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unset($_SESSION['visitor_id']);
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unset($_SESSION['administrator']);
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unset($_SESSION['cid']);
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unset($_SESSION['theme']);
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unset($_SESSION['page_flags']);
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nuke_session();
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notice( t('Logged out.') . EOL);
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goaway($a->get_baseurl());
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}
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@ -23,13 +32,19 @@ if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-p
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// already logged in user returning
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$check = get_config('system','paranoia');
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// extra paranoia - if the IP changed, log them out
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if($check && ($_SESSION['addr'] != $_SERVER['REMOTE_ADDR'])) {
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nuke_session();
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goaway($a->get_baseurl());
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}
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$r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
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intval($_SESSION['uid'])
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);
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if(! count($r)) {
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unset($_SESSION['authenticated']);
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unset($_SESSION['uid']);
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nuke_session();
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goaway($a->get_baseurl());
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}
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@ -57,14 +72,7 @@ if((isset($_SESSION)) && (x($_SESSION,'authenticated')) && ((! (x($_POST,'auth-p
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else {
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if(isset($_SESSION)) {
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unset($_SESSION['authenticated']);
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unset($_SESSION['uid']);
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unset($_SESSION['visitor_id']);
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unset($_SESSION['administrator']);
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unset($_SESSION['cid']);
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unset($_SESSION['theme']);
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unset($_SESSION['my_url']);
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unset($_SESSION['page_flags']);
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nuke_session();
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}
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if((x($_POST,'password')) && strlen($_POST['password']))
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@ -140,6 +148,7 @@ else {
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$_SESSION['authenticated'] = 1;
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$_SESSION['page_flags'] = $r[0]['page-flags'];
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$_SESSION['my_url'] = $a->get_baseurl() . '/profile/' . $r[0]['nickname'];
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$_SESSION['addr'] = $_SERVER['REMOTE_ADDR'];
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notice( t("Welcome back ") . $r[0]['username'] . EOL);
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$a->user = $r[0];
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