From 197203727417a03d87053a47e5aa5175a76e3e0b Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Thu, 17 Oct 2013 04:24:53 -0400
Subject: [PATCH] Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)
---
program/steps/utils/save_pref.inc | 19 ++++++++++++++-----
1 files changed, 14 insertions(+), 5 deletions(-)
diff --git a/program/steps/utils/save_pref.inc b/program/steps/utils/save_pref.inc
index 0bc731a..428e2a2 100644
--- a/program/steps/utils/save_pref.inc
+++ b/program/steps/utils/save_pref.inc
@@ -16,16 +16,26 @@
+-----------------------------------------------------------------------+
*/
-$name = get_input_value('_name', RCUBE_INPUT_POST);
-$value = get_input_value('_value', RCUBE_INPUT_POST);
+$name = get_input_value('_name', RCUBE_INPUT_POST);
+$value = get_input_value('_value', RCUBE_INPUT_POST);
+$sessname = get_input_value('_session', RCUBE_INPUT_POST);
+
+// Whitelisted preferences and session variables, others
+// can be added by plugins
$whitelist = array(
'preview_pane',
'list_cols',
'collapsed_folders',
'collapsed_abooks',
);
+$whitelist_sess = array(
+ 'list_attrib/columns',
+);
-if (!in_array($name, array_merge($whitelist, $RCMAIL->plugins->allowed_prefs))) {
+$whitelist = array_merge($whitelist, $RCMAIL->plugins->allowed_prefs);
+$whitelist_sess = array_merge($whitelist_sess, $RCMAIL->plugins->allowed_session_prefs);
+
+if (!in_array($name, $whitelist) || ($sessname && !in_array($sessname, $whitelist_sess))) {
raise_error(array('code' => 500, 'type' => 'php',
'file' => __FILE__, 'line' => __LINE__,
'message' => sprintf("Hack attempt detected (user: %s)", $_SESSION['username'])),
@@ -39,7 +49,7 @@
$RCMAIL->user->save_prefs(array($name => $value));
// update also session if requested
-if ($sessname = get_input_value('_session', RCUBE_INPUT_POST)) {
+if ($sessname) {
// Support multidimensional arrays...
$vars = explode('/', $sessname);
@@ -54,4 +64,3 @@
$OUTPUT->reset();
$OUTPUT->send();
-
--
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