From 57ce9d5315b6495c4359714f1a2dbc279fe10e8b Mon Sep 17 00:00:00 2001
From: Kyle Spearrin <kyle.spearrin@gmail.com>
Date: Sat, 21 Jul 2018 09:59:37 -0400
Subject: [PATCH] null check on u2f data

---
 src/misc/u2f.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/misc/u2f.ts b/src/misc/u2f.ts
index cb1696c62f4..0c178bf62dc 100644
--- a/src/misc/u2f.ts
+++ b/src/misc/u2f.ts
@@ -63,7 +63,8 @@ export class U2f {
     }
 
     private validMessage(event: any) {
-        if (!event.origin || event.origin === '' || event.origin !== (this.connectorLink as any).origin) {
+        if (!event.origin || event.origin === '' ||
+            event.origin !== (this.connectorLink as any).origin || !event.data) {
             return false;
         }