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Avoid overflow in MDC2_Update()
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Thanks to Shi Lei for reporting this issue.

CVE-2016-6303

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 55d83bf)
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snhenson authored and mattcaswell committed Aug 24, 2016
1 parent e95f5e0 commit 2b4029e
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion crypto/mdc2/mdc2dgst.c
Expand Up @@ -91,7 +91,7 @@ int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)

i = c->num;
if (i != 0) {
if (i + len < MDC2_BLOCK) {
if (len < MDC2_BLOCK - i) {
/* partial block */
memcpy(&(c->data[i]), in, len);
c->num += (int)len;
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