From 72bb01346f37244331c3c8173f6dc72101d44662 Mon Sep 17 00:00:00 2001
From: Scott Nonnenberg <scott@signal.org>
Date: Thu, 23 Jun 2022 15:42:19 -0700
Subject: [PATCH] Check that size is number, not truthiness of size

---
 ts/textsecure/processDataMessage.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ts/textsecure/processDataMessage.ts b/ts/textsecure/processDataMessage.ts
index 721c08fe47..7fa08b8eaa 100644
--- a/ts/textsecure/processDataMessage.ts
+++ b/ts/textsecure/processDataMessage.ts
@@ -3,6 +3,7 @@
 
 import Long from 'long';
 import { ReceiptCredentialPresentation } from '@signalapp/libsignal-client/zkgroup';
+import { isNumber } from 'lodash';
 
 import { assert, strictAssert } from '../util/assert';
 import { dropNull, shallowDropNull } from '../util/dropNull';
@@ -50,7 +51,7 @@ export function processAttachment(
   const hasCdnId = Long.isLong(cdnId) ? !cdnId.isZero() : Boolean(cdnId);
 
   const { contentType, digest, key, size } = attachment;
-  if (!size) {
+  if (!isNumber(size)) {
     throw new Error('Missing size on incoming attachment!');
   }