From f4145e2024d0785d6e72f5963585e7a43cace9cd Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 28 Sep 2016 00:05:12 +0200
Subject: [PATCH] base64: check for integer overflow on large input

CVE-2016-8617

Bug: https://curl.haxx.se/docs/adv_20161102C.html
Reported-by: Cure53

Upstream-commit: efd24d57426bd77c9b5860e6b297904703750412
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
 lib/base64.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/base64.c b/lib/base64.c
index 2212115..8db578c 100644
--- a/lib/base64.c
+++ b/lib/base64.c
@@ -190,6 +190,11 @@ static CURLcode base64_encode(const char *table64,
   if(0 == insize)
     insize = strlen(indata);
 
+#if SIZEOF_SIZE_T == 4
+  if(insize > UINT_MAX/4)
+    return CURLE_OUT_OF_MEMORY;
+#endif
+
   base64data = output = malloc(insize*4/3+4);
   if(NULL == output)
     return CURLE_OUT_OF_MEMORY;
-- 
2.7.4