From 037af6890fe6fdb84a08d3c86083e847c90ec0ad Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Tue, 22 Oct 2013 08:17:26 -0400
Subject: [PATCH] Fix vulnerability in handling _session argument of utils/save-prefs (#1489382)

---
 program/lib/Roundcube/rcube_imap.php |   39 ++++++++++++---------------------------
 1 files changed, 12 insertions(+), 27 deletions(-)

diff --git a/program/lib/Roundcube/rcube_imap.php b/program/lib/Roundcube/rcube_imap.php
index 18c6b12..ca5e35f 100644
--- a/program/lib/Roundcube/rcube_imap.php
+++ b/program/lib/Roundcube/rcube_imap.php
@@ -70,7 +70,7 @@
     protected $search_sort_field = '';
     protected $search_threads = false;
     protected $search_sorted = false;
-    protected $options = array('auth_method' => 'check');
+    protected $options = array('auth_type' => 'check');
     protected $caching = false;
     protected $messages_caching = false;
     protected $threading = false;
@@ -398,10 +398,10 @@
     public function check_permflag($flag)
     {
         $flag       = strtoupper($flag);
-        $imap_flag  = $this->conn->flags[$flag];
         $perm_flags = $this->get_permflags($this->folder);
+        $imap_flag  = $this->conn->flags[$flag];
 
-        return in_array_nocase($imap_flag, $perm_flags);
+        return $imap_flag && !empty($perm_flags) && in_array_nocase($imap_flag, $perm_flags);
     }
 
 
@@ -417,17 +417,7 @@
         if (!strlen($folder)) {
             return array();
         }
-/*
-        Checking PERMANENTFLAGS is rather rare, so we disable caching of it
-        Re-think when we'll use it for more than only MDNSENT flag
 
-        $cache_key = 'mailboxes.permanentflags.' . $folder;
-        $permflags = $this->get_cache($cache_key);
-
-        if ($permflags !== null) {
-            return explode(' ', $permflags);
-        }
-*/
         if (!$this->check_connection()) {
             return array();
         }
@@ -442,10 +432,7 @@
         if (!is_array($permflags)) {
             $permflags = array();
         }
-/*
-        // Store permflags as string to limit cached object size
-        $this->update_cache($cache_key, implode(' ', $permflags));
-*/
+
         return $permflags;
     }
 
@@ -981,7 +968,7 @@
             // use memory less expensive (and quick) method for big result set
             $index = clone $this->index('', $this->sort_field, $this->sort_order);
             // get messages uids for one page...
-            $index->slice($start_msg, min($cnt-$from, $this->page_size));
+            $index->slice($from, min($cnt-$from, $this->page_size));
 
             if ($slice) {
                 $index->slice(-$slice, $slice);
@@ -1336,17 +1323,16 @@
         // THREAD=REFERENCES:     sorting by sent date of root message
         // THREAD=REFS:           sorting by the most recent date in each thread
 
-        if ($this->sort_field && ($this->sort_field != 'date' || $this->get_capability('THREAD') != 'REFS')) {
-            $index = $this->index_direct($this->folder, $this->sort_field, $this->sort_order, false);
+        if ($this->threading != 'REFS' || ($this->sort_field && $this->sort_field != 'date')) {
+            $sortby = $this->sort_field ? $this->sort_field : 'date';
+            $index  = $this->index_direct($this->folder, $sortby, $this->sort_order, false);
 
             if (!$index->is_empty()) {
                 $threads->sort($index);
             }
         }
-        else {
-            if ($this->sort_order != $threads->get_parameters('ORDER')) {
-                $threads->revert();
-            }
+        else if ($this->sort_order != $threads->get_parameters('ORDER')) {
+            $threads->revert();
         }
     }
 
@@ -2726,7 +2712,7 @@
 
         // filter folders list according to rights requirements
         if ($rights && $this->get_capability('ACL')) {
-            $a_folders = $this->filter_rights($a_folders, $rights);
+            $a_mboxes = $this->filter_rights($a_mboxes, $rights);
         }
 
         // filter folders and sort them
@@ -3371,7 +3357,6 @@
     {
         if (!empty($this->options['fetch_headers'])) {
             $headers = explode(' ', $this->options['fetch_headers']);
-            $headers = array_map('strtoupper', $headers);
         }
         else {
             $headers = array();
@@ -3381,7 +3366,7 @@
             $headers = array_merge($headers, $this->all_headers);
         }
 
-        return implode(' ', array_unique($headers));
+        return $headers;
     }
 
 

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