[openssl-commits] [openssl] OpenSSL_1_0_2-stable update

[Matt Caswell]

The branch OpenSSL_1_0_2-stable has been updated
       via  1027ad4f34c30b8585592764b9a670ba36888269 (commit)
      from  0fff5065884d5ac61123a604bbcee30a53c808ff (commit)


- Log -----------------------------------------------------------------
commit 1027ad4f34c30b8585592764b9a670ba36888269
Author: Dr. Stephen Henson <steve at openssl.org>
Date:   Fri Aug 19 23:28:29 2016 +0100

    Avoid overflow in MDC2_Update()
    
    Thanks to Shi Lei for reporting this issue.
    
    CVE-2016-6303
    
    Reviewed-by: Matt Caswell <matt at openssl.org>
    (cherry picked from commit 55d83bf7c10c7b205fffa23fa7c3977491e56c07)

-----------------------------------------------------------------------

Summary of changes:
 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 6615cf8..2dce493 100644
--- a/crypto/mdc2/mdc2dgst.c
+++ b/crypto/mdc2/mdc2dgst.c
@@ -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;