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From 3599341dd611303ee9544839d30f603f606d1082 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
---
lib/base64.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/lib/base64.c b/lib/base64.c
index ad25459..204a227 100644
--- a/lib/base64.c
+++ b/lib/base64.c
@@ -188,10 +188,15 @@ static CURLcode base64_encode(const char *table64,
*outlen = 0;
if(!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(!output)
return CURLE_OUT_OF_MEMORY;
/*
--
2.9.3
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