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authorDaniel Stenberg <daniel@haxx.se>2016-09-28 00:05:12 +0200
committerDaniel Stenberg <daniel@haxx.se>2016-10-31 08:46:35 +0100
commitefd24d57426bd77c9b5860e6b297904703750412 (patch)
treef7020834acedfe81fded05d7d177224e26600530 /lib
parent3d6460edeee21d7d790ec570d0887bed1f4366dd (diff)
base64: check for integer overflow on large input
CVE-2016-8617 Bug: https://curl.haxx.se/docs/adv_20161102C.html Reported-by: Cure53
Diffstat (limited to 'lib')
-rw-r--r--lib/base64.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/base64.c b/lib/base64.c
index ad254595f..204a2273d 100644
--- a/lib/base64.c
+++ b/lib/base64.c
@@ -190,6 +190,11 @@ static CURLcode base64_encode(const char *table64,
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;