From bd71fb8a689d8f5479461501057be1111a92ccff Mon Sep 17 00:00:00 2001
From: Ethan Lee <flibitijibibo@gmail.com>
Date: Sun, 14 Jun 2020 22:43:58 -0400
Subject: [PATCH] Disallow negative size values in BinaryBlob

---
 desktop_version/src/BinaryBlob.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/desktop_version/src/BinaryBlob.cpp b/desktop_version/src/BinaryBlob.cpp
index 8d25ec25..76eea13a 100644
--- a/desktop_version/src/BinaryBlob.cpp
+++ b/desktop_version/src/BinaryBlob.cpp
@@ -105,6 +105,10 @@ bool binaryBlob::unPackBinary(const char* name)
 		{
 			continue; /* Must be EXACTLY 1 or 0 */
 		}
+		if (size < 1)
+		{
+			continue; /* Must be nonzero and positive */
+		}
 		if ((offset + m_headers[i].size) > size)
 		{
 			continue; /* Bogus size value */