From 6652367d656de7e5f404935be04e10aa281add53 Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Fri, 6 May 2016 08:28:15 +0200
Subject: [PATCH] Fix XSS issue in href attribute on area tag (#5240, #5241)

---
 CHANGELOG                               |  1 +
 program/lib/Roundcube/rcube_washtml.php |  2 +-
 tests/Framework/Washtml.php             | 17 +++++++++++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG b/CHANGELOG
index 32a402cb0a1..2ae4e8daa29 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -13,6 +13,7 @@ CHANGELOG Roundcube Webmail
 - Fix bug where contact search menu fields where always unchecked in Larry skin
 - Fix autoloading of 'html' class
 - Fix bug where Encrypt button appears when switching editor to HTML (#5235)
+- Fix XSS issue in href attribute on area tag (#5240)
 
 RELEASE 1.2-rc
 --------------
diff --git a/program/lib/Roundcube/rcube_washtml.php b/program/lib/Roundcube/rcube_washtml.php
index 5938d9b8748..d03f04af4f5 100644
--- a/program/lib/Roundcube/rcube_washtml.php
+++ b/program/lib/Roundcube/rcube_washtml.php
@@ -370,7 +370,7 @@ private function wash_uri($uri, $blocked_source = false)
      */
     private function is_link_attribute($tag, $attr)
     {
-        return $tag == 'a' && $attr == 'href';
+        return ($tag == 'a' || $tag == 'area') && $attr == 'href';
     }
 
     /**
diff --git a/tests/Framework/Washtml.php b/tests/Framework/Washtml.php
index 9515f0d7ab8..2e681791c19 100644
--- a/tests/Framework/Washtml.php
+++ b/tests/Framework/Washtml.php
@@ -37,6 +37,23 @@ function test_href()
         $this->assertRegExp('|href="http://test.com">|', $washed, "Link href with newlines (#1488940)");
     }
 
+    /**
+     * Test XSS in area's href (#5240)
+     */
+    function test_href_area()
+    {
+        $html = '<p><area href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">'
+            . '<area href="vbscript:alert(document.cookie)">Internet Explorer</p>'
+            . '<area href="javascript:alert(document.domain)" shape=default>';
+
+        $washer = new rcube_washtml;
+        $washed = $washer->wash($html);
+
+        $this->assertNotRegExp('/data:text/', $washed, "data:text/html in area href");
+        $this->assertNotRegExp('/vbscript:/', $washed, "vbscript: in area href");
+        $this->assertNotRegExp('/javascript:/', $washed, "javascript: in area href");
+    }
+
     /**
      * Test handling HTML comments
      */