[patch] sqm-144-xss.patch

sqm-144-xss.patch (text/plain), 25.48 KB, created by Thierry Carrez (RETIRED) on 2005-06-14 01:52:48 UTC

diff -uwr squirrelmail-1.4.4.orig/functions/addressbook.php squirrelmail-1.4.4/functions/addressbook.php
--- squirrelmail-1.4.4.orig/functions/addressbook.php	Mon Dec 27 16:03:42 2004
+++ squirrelmail-1.4.4/functions/addressbook.php	Mon Jun 13 21:59:31 2005
@@ -108,7 +108,7 @@
                 if (!$r && $showerr) {
                     printf( ' ' . _("Error initializing LDAP server %s:") .
                             "<br />\n", $param['host']);
-                    echo '&nbsp;' . $abook->error;
+                    echo '&nbsp;' . htmlspecialchars($abook->error);
                     exit;
                 }
             }
@@ -239,7 +239,7 @@
                 if (is_array($res)) {
                     $ret = array_merge($ret, $res);
                 } else {
-                    $this->error .= "<br />\n" . $backend->error;
+                    $this->error .= "\n" . $backend->error;
                     $failed++;
                 }
             }
@@ -255,7 +255,7 @@

             $ret = $this->backends[$bnum]->search($expression);
             if (!is_array($ret)) {
-                $this->error .= "<br />\n" . $this->backends[$bnum]->error;
+                $this->error .= "\n" . $this->backends[$bnum]->error;
                 $ret = FALSE;
             }
         }
diff -uwr squirrelmail-1.4.4.orig/functions/mime.php squirrelmail-1.4.4/functions/mime.php
--- squirrelmail-1.4.4.orig/functions/mime.php	Mon Jan 10 19:52:48 2005
+++ squirrelmail-1.4.4/functions/mime.php	Mon Jun 13 21:59:31 2005
@@ -1388,12 +1388,33 @@
                 }
             }
         }
+
+        /**
+         * Replace empty src tags with the blank image.  src is only used
+         * for frames, images, and image inputs.  Doing a replace should
+         * not affect them working as should be, however it will stop
+         * IE from being kicked off when src for img tags are not set
+         */
+        if (($attname == 'src') && ($attvalue == '""')) {
+            $attary{$attname} = '"' . SM_PATH . 'images/blank.png"';
+        }
+
         /**
          * Turn cid: urls into http-friendly ones.
          */
         if (preg_match("/^[\'\"]\s*cid:/si", $attvalue)){
             $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox);
         }
+
+        /**
+         * "Hack" fix for Outlook using propriatary outbind:// protocol in img tags.
+         * One day MS might actually make it match something useful, for now, falling
+         * back to using cid2http, so we can grab the blank.png.
+         */
+        if (preg_match("/^[\'\"]\s*outbind:\/\//si", $attvalue)) {
+            $attary{$attname} = sq_cid2http($message, $id, $attvalue, $mailbox);
+        }
+
     }
     /**
      * See if we need to append any attributes to this tag.
@@ -1408,7 +1429,7 @@

 /**
  * This function edits the style definition to make them friendly and
- * usable in squirrelmail.
+ * usable in SquirrelMail.
  *
  * @param  $message  the message object
  * @param  $id       the message id
@@ -1436,27 +1457,54 @@
     /**
      * Fix url('blah') declarations.
      */
-    $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si",
-                            "url(\\1$secremoveimg\\2)", $content);
+    //   $content = preg_replace("|url\s*\(\s*([\'\"])\s*\S+script\s*:.*?([\'\"])\s*\)|si",
+    //                           "url(\\1$secremoveimg\\2)", $content);
+    // remove NUL
+    $content = str_replace("\0", "", $content);
+    // NB I insert NUL characters to keep to avoid an infinite loop. They are removed after the loop.
+    while (preg_match("/url\s*\(\s*[\'\"]?([^:]+):(.*)?[\'\"]?\s*\)/si", $content, $matches)) {
+        $sProto = strtolower($matches[1]);
+        switch ($sProto) {
     /**
      * Fix url('https*://.*) declarations but only if $view_unsafe_images
      * is false.
      */
+          case 'https':
+          case 'http':
     if (!$view_unsafe_images){
-        $content = preg_replace("|url\s*\(\s*([\'\"])\s*https*:.*?([\'\"])\s*\)|si",
-                                "url(\\1$secremoveimg\\2)", $content);
+                $sExpr = "/url\s*\(\s*([\'\"])\s*$sProto*:.*?([\'\"])\s*\)/si";
+                $content = preg_replace($sExpr, "u\0r\0l(\\1$secremoveimg\\2)", $content);
     }
-
+            break;
     /**
      * Fix urls that refer to cid:
      */
-    while (preg_match("|url\s*\(\s*([\'\"]\s*cid:.*?[\'\"])\s*\)|si",
-                      $content, $matches)){
-        $cidurl = $matches{1};
+          case 'cid':
+            $cidurl = 'cid:'. $matches[2];
         $httpurl = sq_cid2http($message, $id, $cidurl, $mailbox);
         $content = preg_replace("|url\s*\(\s*$cidurl\s*\)|si",
-                                "url($httpurl)", $content);
+                                "u\0r\0l($httpurl)", $content);
+            break;
+          default:
+            /**
+             * replace url with protocol other then the white list
+             * http,https and cid by an empty string.
+             */
+            $content = preg_replace("/url\s*\(\s*[\'\"]?([^:]+):(.*)?[\'\"]?\s*\)/si",
+                                "", $content);
+            break;
     }
+        break;
+    }
+    // remove NUL
+    $content = str_replace("\0", "", $content);
+
+   /**
+    * Remove any backslashes, entities, and extraneous whitespace.
+    */
+    $contentTemp = $content;
+    sq_defang($contentTemp);
+    sq_unspace($contentTemp);

     /**
      * Fix stupid css declarations which lead to vulnerabilities
@@ -1467,10 +1515,16 @@
                      '/binding/i',
                      '/include-source/i');
     $replace = Array('idiocy', 'idiocy', 'idiocy', 'idiocy');
-    $content = preg_replace($match, $replace, $content);
+    $contentNew = preg_replace($match, $replace, $contentTemp);
+    if ($contentNew !== $contentTemp) {
+        // insecure css declarations are used. From now on we don't care
+        // anymore if the css is destroyed by sq_deent, sq_unspace or sq_unbackslash
+        $content = $contentNew;
+    }
     return array($content, $newpos);
 }

+
 /**
  * This function converts cid: url's into the ones that can be viewed in
  * the browser.
@@ -1492,15 +1546,46 @@
         $quotchar = '';
     }
     $cidurl = substr(trim($cidurl), 4);
+
+    $match_str = '/\{.*?\}\//';
+    $str_rep = '';
+    $cidurl = preg_replace($match_str, $str_rep, $cidurl);
+
     $linkurl = find_ent_id($cidurl, $message);
     /* in case of non-save cid links $httpurl should be replaced by a sort of
        unsave link image */
     $httpurl = '';
-    if ($linkurl) {
+
+    /**
+     * This is part of a fix for Outlook Express 6.x generating
+     * cid URLs without creating content-id headers. These images are
+     * not part of the multipart/related html mail. The html contains
+     * <img src="cid:{some_id}/image_filename.ext"> references to
+     * attached images with as goal to render them inline although
+     * the attachment disposition property is not inline.
+     */
+
+    if (empty($linkurl)) {
+        if (preg_match('/{.*}\//', $cidurl)) {
+            $cidurl = preg_replace('/{.*}\//','', $cidurl);
+            if (!empty($cidurl)) {
+                $linkurl = find_ent_id($cidurl, $message);
+            }
+        }
+    }
+
+    if (!empty($linkurl)) {
         $httpurl = $quotchar . SM_PATH . 'src/download.php?absolute_dl=true&amp;' .
                    "passed_id=$id&amp;mailbox=" . urlencode($mailbox) .
                    '&amp;ent_id=' . $linkurl . $quotchar;
+    } else {
+        /**
+         * If we couldn't generate a proper img url, drop in a blank image
+         * instead of sending back empty, otherwise it causes unusual behaviour
+         */
+        $httpurl = $quotchar . SM_PATH . 'images/blank.png';
     }
+
     return $httpurl;
 }

@@ -1526,8 +1611,7 @@
             $attvalue = str_replace($quotchar, "", $attvalue);
             switch ($attname){
                 case 'background':
-                    $attvalue = sq_cid2http($message, $id,
-                                            $attvalue, $mailbox);
+                    $attvalue = sq_cid2http($message, $id, $attvalue, $mailbox);
                     $styledef .= "background-image: url('$attvalue'); ";
                     break;
                 case 'bgcolor':
@@ -1754,6 +1838,7 @@
                                   "embed",
                                   "title",
                                   "frameset",
+            "xmp",
                                   "xml"
                                   );

@@ -1761,7 +1846,8 @@
                                 "img",
                                 "br",
                                 "hr",
-                                "input"
+            "input",
+            "outbind"
                                 );

     $force_tag_closing = true;
@@ -1816,6 +1902,7 @@
                                 "/binding/i",
                                 "/behaviou*r/i",
                                 "/include-source/i",
+                    "/position\s*:\s*absolute/i",
                                 "/url\s*\(\s*([\'\"])\s*\S+script\s*:.*([\'\"])\s*\)/si",
                                 "/url\s*\(\s*([\'\"])\s*mocha\s*:.*([\'\"])\s*\)/si",
                                 "/url\s*\(\s*([\'\"])\s*about\s*:.*([\'\"])\s*\)/si",
@@ -1826,6 +1913,7 @@
                                 "idiocy",
                                 "idiocy",
                                 "idiocy",
+                    "",
                                 "url(\\1#\\1)",
                                 "url(\\1#\\1)",
                                 "url(\\1#\\1)",
@@ -1856,7 +1944,7 @@

     $add_attr_to_tag = Array(
         "/^a$/i" =>
-            Array('target'=>'"_new"',
+            Array('target'=>'"_blank"',
                   'title'=>'"'._("This external link will open in a new window").'"'
             )
     );
diff -uwr squirrelmail-1.4.4.orig/functions/page_header.php squirrelmail-1.4.4/functions/page_header.php
--- squirrelmail-1.4.4.orig/functions/page_header.php	Mon Dec 27 22:08:58 2004
+++ squirrelmail-1.4.4/functions/page_header.php	Mon Jun 13 21:59:31 2005
@@ -275,6 +275,7 @@
                                  : html_tag( 'td', '', 'left' ) )
         . "\n";
     $urlMailbox = urlencode($mailbox);
+    $startMessage = (int)$startMessage;
     echo makeComposeLink('src/compose.php?mailbox='.$urlMailbox.'&amp;startMessage='.$startMessage);
     echo "&nbsp;&nbsp;\n";
     displayInternalLink ('src/addressbook.php', _("Addresses"));
diff -uwr squirrelmail-1.4.4.orig/plugins/calendar/calendar.php squirrelmail-1.4.4/plugins/calendar/calendar.php
--- squirrelmail-1.4.4.orig/plugins/calendar/calendar.php	Mon Dec 27 16:03:49 2004
+++ squirrelmail-1.4.4/plugins/calendar/calendar.php	Mon Jun 13 21:59:31 2005
@@ -29,16 +29,16 @@

 /* get globals */

-if (isset($_GET['month'])) {
+if (isset($_GET['month']) && is_numeric($_GET['month'])) {
     $month = $_GET['month'];
 }
-if (isset($_GET['year'])) {
+if (isset($_GET['year']) && is_numeric($_GET['year'])) {
     $year = $_GET['year'];
 }
-if (isset($_POST['year'])) {
+if (isset($_POST['year']) && is_numeric($_POST['year'])) {
     $year = $_POST['year'];
 }
-if (isset($_POST['month'])) {
+if (isset($_POST['month']) && is_numeric($_POST['month'])) {
     $month = $_POST['month'];
 }
 /* got 'em */
diff -uwr squirrelmail-1.4.4.orig/plugins/calendar/day.php squirrelmail-1.4.4/plugins/calendar/day.php
--- squirrelmail-1.4.4.orig/plugins/calendar/day.php	Mon Dec 27 16:03:49 2004
+++ squirrelmail-1.4.4/plugins/calendar/day.php	Mon Jun 13 21:59:31 2005
@@ -29,22 +29,22 @@
 require_once(SM_PATH . 'functions/html.php');

 /* get globals */
-if (isset($_GET['year'])) {
+if (isset($_GET['year']) && is_numeric($_GET['year'])) {
     $year = $_GET['year'];
 }
-elseif (isset($_POST['year'])) {
+elseif (isset($_POST['year']) && is_numeric($_POST['year'])) {
     $year = $_POST['year'];
 }
-if (isset($_GET['month'])) {
+if (isset($_GET['month']) && is_numeric($_GET['month'])) {
     $month = $_GET['month'];
 }
-elseif (isset($_POST['month'])) {
+elseif (isset($_POST['month']) && is_numeric($_POST['month'])) {
     $month = $_POST['month'];
 }
-if (isset($_GET['day'])) {
+if (isset($_GET['day']) && is_numeric($_GET['day'])) {
     $day = $_GET['day'];
 }
-elseif (isset($_POST['day'])) {
+elseif (isset($_POST['day']) && is_numeric($_POST['day'])) {
     $day = $_POST['day'];
 }

diff -uwr squirrelmail-1.4.4.orig/plugins/calendar/event_create.php squirrelmail-1.4.4/plugins/calendar/event_create.php
--- squirrelmail-1.4.4.orig/plugins/calendar/event_create.php	Mon Dec 27 16:03:49 2004
+++ squirrelmail-1.4.4/plugins/calendar/event_create.php	Mon Jun 13 21:59:31 2005
@@ -29,40 +29,40 @@

 /* get globals */

-if (isset($_POST['year'])) {
+if (isset($_POST['year']) && is_numeric($_POST['year'])) {
     $year = $_POST['year'];
 }
-elseif (isset($_GET['year'])) {
+elseif (isset($_GET['year']) && is_numeric($_GET['year'])) {
     $year = $_GET['year'];
 }
-if (isset($_POST['month'])) {
+if (isset($_POST['month']) && is_numeric($_POST['month'])) {
     $month = $_POST['month'];
 }
-elseif (isset($_GET['month'])) {
+elseif (isset($_GET['month']) && is_numeric($_GET['month'])) {
     $month = $_GET['month'];
 }
-if (isset($_POST['day'])) {
+if (isset($_POST['day']) && is_numeric($_POST['day'])) {
     $day = $_POST['day'];
 }
-elseif (isset($_GET['day'])) {
+elseif (isset($_GET['day']) && is_numeric($_GET['day'])) {
     $day = $_GET['day'];
 }
-if (isset($_POST['hour'])) {
+if (isset($_POST['hour']) && is_numeric($_POST['hour'])) {
     $hour = $_POST['hour'];
 }
-elseif (isset($_GET['hour'])) {
+elseif (isset($_GET['hour']) && is_numeric($_GET['hour'])) {
     $hour = $_GET['hour'];
 }
-if (isset($_POST['event_hour'])) {
+if (isset($_POST['event_hour']) && is_numeric($_POST['event_hour'])) {
     $event_hour = $_POST['event_hour'];
 }
-if (isset($_POST['event_minute'])) {
+if (isset($_POST['event_minute']) && is_numeric($_POST['event_minute'])) {
     $event_minute = $_POST['event_minute'];
 }
-if (isset($_POST['event_length'])) {
+if (isset($_POST['event_length']) && is_numeric($_POST['event_length'])) {
     $event_length = $_POST['event_length'];
 }
-if (isset($_POST['event_priority'])) {
+if (isset($_POST['event_priority']) && is_numeric($_POST['event_priority'])) {
     $event_priority = $_POST['event_priority'];
 }
 if (isset($_POST['event_title'])) {
diff -uwr squirrelmail-1.4.4.orig/plugins/calendar/event_edit.php squirrelmail-1.4.4/plugins/calendar/event_edit.php
--- squirrelmail-1.4.4.orig/plugins/calendar/event_edit.php	Mon Dec 27 16:03:49 2004
+++ squirrelmail-1.4.4/plugins/calendar/event_edit.php	Mon Jun 13 21:59:31 2005
@@ -33,22 +33,22 @@
 if (isset($_POST['updated'])) {
     $updated = $_POST['updated'];
 }
-if (isset($_POST['event_year'])) {
+if (isset($_POST['event_year']) && is_numeric($_POST['event_year'])) {
     $event_year = $_POST['event_year'];
 }
-if (isset($_POST['event_month'])) {
+if (isset($_POST['event_month']) && is_numeric($_POST['event_month'])) {
     $event_month = $_POST['event_month'];
 }
-if (isset($_POST['event_day'])) {
+if (isset($_POST['event_day']) && is_numeric($_POST['event_day'])) {
     $event_day = $_POST['event_day'];
 }
-if (isset($_POST['event_hour'])) {
+if (isset($_POST['event_hour']) && is_numeric($_POST['event_hour'])) {
     $event_hour = $_POST['event_hour'];
 }
-if (isset($_POST['event_minute'])) {
+if (isset($_POST['event_minute']) && is_numeric($_POST['event_minute'])) {
     $event_minute = $_POST['event_minute'];
 }
-if (isset($_POST['event_length'])) {
+if (isset($_POST['event_length']) && is_numeric($_POST['event_length'])) {
     $event_length = $_POST['event_length'];
 }
 if (isset($_POST['event_title'])) {
@@ -60,40 +60,40 @@
 if (isset($_POST['send'])) {
     $send = $_POST['send'];
 }
-if (isset($_POST['event_priority'])) {
+if (isset($_POST['event_priority']) && is_numeric($_POST['event_priority'])) {
     $event_priority = $_POST['event_priority'];
 }
 if (isset($_POST['confirmed'])) {
     $confirmed = $_POST['confirmed'];
 }
-if (isset($_POST['year'])) {
+if (isset($_POST['year']) && is_numeric($_POST['year'])) {
     $year = $_POST['year'];
 }
-elseif (isset($_GET['year'])) {
+elseif (isset($_GET['year']) && is_numeric($_GET['year'])) {
     $year = $_GET['year'];
 }
-if (isset($_POST['month'])) {
+if (isset($_POST['month']) && is_numeric($_POST['month'])) {
     $month = $_POST['month'];
 }
-elseif (isset($_GET['month'])) {
+elseif (isset($_GET['month']) && is_numeric($_GET['month'])) {
     $month = $_GET['month'];
 }
-if (isset($_POST['day'])) {
+if (isset($_POST['day']) && is_numeric($_POST['day'])) {
     $day = $_POST['day'];
 }
-elseif (isset($_GET['day'])) {
+elseif (isset($_GET['day']) && is_numeric($_GET['day'])) {
     $day = $_GET['day'];
 }
-if (isset($_POST['hour'])) {
+if (isset($_POST['hour']) && is_numeric($_POST['hour'])) {
     $hour = $_POST['hour'];
 }
-elseif (isset($_GET['hour'])) {
+elseif (isset($_GET['hour']) && is_numeric($_GET['hour'])) {
     $hour = $_GET['hour'];
 }
-if (isset($_POST['minute'])) {
+if (isset($_POST['minute']) && is_numeric($_POST['minute'])) {
     $minute = $_POST['minute'];
 }
-elseif (isset($_GET['minute'])) {
+elseif (isset($_GET['minute']) && is_numeric($_GET['minute'])) {
     $minute = $_GET['minute'];
 }
 /* got 'em */
diff -uwr squirrelmail-1.4.4.orig/plugins/filters/options.php squirrelmail-1.4.4/plugins/filters/options.php
--- squirrelmail-1.4.4.orig/plugins/filters/options.php	Mon Dec 27 16:03:57 2004
+++ squirrelmail-1.4.4/plugins/filters/options.php	Mon Jun 13 21:59:31 2005
@@ -189,7 +189,7 @@
                 html_tag( 'td', '', 'left' ) .
                     '<input type="text" size="32" name="filter_what" value="';
         if (isset($filters[$theid]['what'])) {
-            echo $filters[$theid]['what'];
+            echo htmlspecialchars($filters[$theid]['what']);
         }
         echo '" />'.
                 '</td>'.
diff -uwr squirrelmail-1.4.4.orig/plugins/filters/spamoptions.php squirrelmail-1.4.4/plugins/filters/spamoptions.php
--- squirrelmail-1.4.4.orig/plugins/filters/spamoptions.php	Mon Dec 27 16:03:57 2004
+++ squirrelmail-1.4.4/plugins/filters/spamoptions.php	Mon Jun 13 21:59:31 2005
@@ -199,7 +199,7 @@
     echo html_tag( 'p', '', 'center' ) .
          '[<a href="spamoptions.php?action=spam">' . _("Edit") . '</a>]' .
          ' - [<a href="../../src/options.php">' . _("Done") . '</a>]</center><br /><br />';
-    printf( _("Spam is sent to %s."), ($filters_spam_folder?'<b>'.imap_utf7_decode_local($filters_spam_folder).'</b>':'[<i>'._("not set yet").'</i>]' ) );
+    printf( _("Spam is sent to %s."), ($filters_spam_folder?'<b>'.htmlspecialchars(imap_utf7_decode_local($filters_spam_folder)).'</b>':'[<i>'._("not set yet").'</i>]' ) );
     echo '<br />';
     printf( _("Spam scan is limited to %s."), '<b>' . ( ($filters_spam_scan == 'new')?_("Unread messages only"):_("All messages") ) . '</b>' );
     echo '</p>'.
diff -uwr squirrelmail-1.4.4.orig/plugins/listcommands/mailout.php squirrelmail-1.4.4/plugins/listcommands/mailout.php
--- squirrelmail-1.4.4.orig/plugins/listcommands/mailout.php	Mon Dec 27 16:03:58 2004
+++ squirrelmail-1.4.4/plugins/listcommands/mailout.php	Mon Jun 13 21:59:31 2005
@@ -25,14 +25,6 @@
 sqgetGlobalVar('body',    $body,    SQ_GET);
 sqgetGlobalVar('action',  $action,  SQ_GET);

-echo html_tag('p', '', 'left' ) .
-html_tag( 'table', '', 'center', $color[0], 'border="0" width="75%"' ) . "\n" .
-    html_tag( 'tr',
-        html_tag( 'th', _("Mailinglist") . ' ' . _($action), '', $color[9] )
-    ) .
-    html_tag( 'tr' ) .
-    html_tag( 'td', '', 'left' );
-
 switch ( $action ) {
 case 'help':
     $out_string = _("This will send a message to %s requesting help for this list. You will receive an emailed response at the address below.");
@@ -42,7 +34,19 @@
     break;
 case 'unsubscribe':
     $out_string = _("This will send a message to %s requesting that you will be unsubscribed from this list. It will try to unsubscribe the adress below.");
+default:
+    error_box(sprintf(_("Unknown action: %s"),htmlspecialchars($action)), $color);
+    exit;
 }
+
+echo html_tag('p', '', 'left' ) .
+html_tag( 'table', '', 'center', $color[0], 'border="0" width="75%"' ) . "\n" .
+    html_tag( 'tr',
+        html_tag( 'th', _("Mailinglist") . ' ' . _($action), '', $color[9] )
+    ) .
+    html_tag( 'tr' ) .
+    html_tag( 'td', '', 'left' );
+

 printf( $out_string, htmlspecialchars($send_to) );

diff -uwr squirrelmail-1.4.4.orig/plugins/newmail/newmail.php squirrelmail-1.4.4/plugins/newmail/newmail.php
--- squirrelmail-1.4.4.orig/plugins/newmail/newmail.php	Mon Dec 27 16:03:58 2004
+++ squirrelmail-1.4.4/plugins/newmail/newmail.php	Mon Jun 13 21:59:31 2005
@@ -22,6 +22,7 @@
 require_once(SM_PATH . 'functions/page_header.php');

 sqGetGlobalVar('numnew', $numnew, SQ_GET);
+$numnew = (int)$numnew;

    displayHtmlHeader( _("New Mail"), '', FALSE );

diff -uwr squirrelmail-1.4.4.orig/plugins/spamcop/setup.php squirrelmail-1.4.4/plugins/spamcop/setup.php
--- squirrelmail-1.4.4.orig/plugins/spamcop/setup.php	Mon Dec 27 16:03:58 2004
+++ squirrelmail-1.4.4/plugins/spamcop/setup.php	Mon Jun 13 21:59:31 2005
@@ -75,6 +75,9 @@
    sqgetGlobalVar('passed_ent_id',$passed_ent_id,SQ_FORM);
    sqgetGlobalVar('mailbox',      $mailbox,      SQ_FORM);
    sqgetGlobalVar('startMessage', $startMessage, SQ_FORM);
+   if ( sqgetGlobalVar('startMessage', $startMessage, SQ_FORM) ) {
+       $startMessage = (int)$startMessage;
+   }
    /* END GLOBALS */

    // catch unset passed_ent_id
diff -uwr squirrelmail-1.4.4.orig/plugins/squirrelspell/modules/lang_change.mod squirrelmail-1.4.4/plugins/squirrelspell/modules/lang_change.mod
--- squirrelmail-1.4.4.orig/plugins/squirrelspell/modules/lang_change.mod	Sat Jun 12 18:39:48 2004
+++ squirrelmail-1.4.4/plugins/squirrelspell/modules/lang_change.mod	Mon Jun 13 21:59:31 2005
@@ -69,11 +69,11 @@
   $lang_array = explode( ',', $lang_string );
   $dsp_string = '';
   foreach( $lang_array as $a) {
-    $dsp_string .= _(trim($a)) . ', ';
+    $dsp_string .= _(htmlspecialchars(trim($a))) . ', ';
   }
   $dsp_string = substr( $dsp_string, 0, -2 );
   $msg = '<p>'
-    . sprintf(_("Settings adjusted to: %s with %s as default dictionary."), '<strong>'.$dsp_string.'</strong>', '<strong>'._($lang_default).'</strong>')
+    . sprintf(_("Settings adjusted to: %s with %s as default dictionary."), '<strong>'.$dsp_string.'</strong>', '<strong>'._(htmlspecialchars($lang_default)).'</strong>')
     . '</p>';
 } else {
   /**
diff -uwr squirrelmail-1.4.4.orig/src/addressbook.php squirrelmail-1.4.4/src/addressbook.php
--- squirrelmail-1.4.4.orig/src/addressbook.php	Mon Dec 27 16:03:59 2004
+++ squirrelmail-1.4.4/src/addressbook.php	Mon Jun 13 21:59:31 2005
@@ -279,7 +279,7 @@
                                     html_tag( 'tr',
                                         html_tag( 'td',
                                             "\n". '<strong><font color="' . $color[2] .
-                                            '">' . _("ERROR") . ': ' . $abook->error . '</font></strong>' ."\n",
+                                            '">' . _("ERROR") . ': ' . htmlspecialchars($abook->error) . '</font></strong>' ."\n",
                                             'center' )
                                         ),
                                     'center', '', 'width="100%"' );
@@ -331,7 +331,7 @@
             html_tag( 'tr',
                 html_tag( 'td',
                     "\n". '<br /><strong><font color="' . $color[2] .
-                    '">' . _("ERROR") . ': ' . $formerror . '</font></strong>' ."\n",
+                    '">' . _("ERROR") . ': ' . htmlspecialchars($formerror) . '</font></strong>' ."\n",
                     'center' )
                 ),
             'center', '', 'width="100%"' );
@@ -343,6 +343,7 @@
     /* Get and sort address list */
     $alist = $abook->list_addr();
     if(!is_array($alist)) {
+        htmlspecialchars($abook_error);
         plain_error_message($abook->error, $color);
         exit;
     }
diff -uwr squirrelmail-1.4.4.orig/src/compose.php squirrelmail-1.4.4/src/compose.php
--- squirrelmail-1.4.4.orig/src/compose.php	Mon Jan  3 16:06:28 2005
+++ squirrelmail-1.4.4/src/compose.php	Mon Jun 13 22:12:34 2005
@@ -76,6 +76,11 @@
 sqgetGlobalVar('saved_draft',$saved_draft);
 sqgetGlobalVar('delete_draft',$delete_draft);
 sqgetGlobalVar('startMessage',$startMessage);
+if ( sqgetGlobalVar('startMessage',$startMessage) ) {
+    $startMessage = (int)$startMessage;
+} else {
+    $startMessage = 1;
+}

 /** POST VARS */
 sqgetGlobalVar('sigappend',             $sigappend,             SQ_POST);
diff -uwr squirrelmail-1.4.4.orig/src/printer_friendly_bottom.php squirrelmail-1.4.4/src/printer_friendly_bottom.php
--- squirrelmail-1.4.4.orig/src/printer_friendly_bottom.php	Tue Dec 28 14:02:49 2004
+++ squirrelmail-1.4.4/src/printer_friendly_bottom.php	Mon Jun 13 21:59:31 2005
@@ -33,7 +33,8 @@
 sqgetGlobalVar('passed_id', $passed_id, SQ_GET);
 sqgetGlobalVar('mailbox', $mailbox, SQ_GET);

-if (! sqgetGlobalVar('passed_ent_id', $passed_ent_id, SQ_GET) ) {
+if (! sqgetGlobalVar('passed_ent_id', $passed_ent_id, SQ_GET) ||
+    ! preg_match('/^\d+(\.\d+)*$/', $passed_ent_id) ) {
     $passed_ent_id = '';
 }
 /* end globals */
diff -uwr squirrelmail-1.4.4.orig/src/right_main.php squirrelmail-1.4.4/src/right_main.php
--- squirrelmail-1.4.4.orig/src/right_main.php	Mon Dec 27 16:04:00 2004
+++ squirrelmail-1.4.4/src/right_main.php	Mon Jun 13 21:59:31 2005
@@ -165,7 +165,7 @@

 do_hook('right_main_after_header');
 if (isset($note)) {
-    echo html_tag( 'div', '<b>' . $note .'</b>', 'center' ) . "<br />\n";
+    echo html_tag( 'div', '<b>' . htmlspecialchars($note) .'</b>', 'center' ) . "<br />\n";
 }

 if ( sqgetGlobalVar('just_logged_in', $just_logged_in, SQ_SESSION) ) {