Fix next redirect if only one / exists

2016-06-29 20:54:13 -04:00
parent 5f80300c5d
commit f87c3e260c
1 changed files with 7 additions and 5 deletions
@@ -1918,11 +1918,13 @@ class Auth(object):
        if isinstance(next, (list, tuple)):
            next = next[0]
        if next and self.settings.prevent_open_redirect_attacks:
-            # Prevent an attacker from adding an arbitrary url after the
-            # _next variable in the request.
-            items = next.split('/')
-            if '//' in next and items[2] != current.request.env.http_host:
-                next = None
+            # Prevent an attacker from adding an arbitrary url after the _next variable in the request.
+            # Browsers will fix a single / so check multiple things just in case
+            items = filter(None, next.split('/'))
+            has_url = any(x in next for x in ['//', ':', 'ftp', 'http', 'rss', 'xml'])
+            if has_url and len(items) > 1:
+                if items[1] != current.request.env.http_host:
+                    next = None
        return next

    def _get_user_id(self):