From 55d83bf7c10c7b205fffa23fa7c3977491e56c07 Mon Sep 17 00:00:00 2001 From: "Dr. Stephen Henson" Date: Fri, 19 Aug 2016 23:28:29 +0100 Subject: [PATCH] Avoid overflow in MDC2_Update() Thanks to Shi Lei for reporting this issue. CVE-2016-6303 Reviewed-by: Matt Caswell --- crypto/mdc2/mdc2dgst.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/mdc2/mdc2dgst.c b/crypto/mdc2/mdc2dgst.c index 6397a47e92..37d99f48a5 100644 --- a/crypto/mdc2/mdc2dgst.c +++ b/crypto/mdc2/mdc2dgst.c @@ -42,7 +42,7 @@ 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; -- 2.25.1