diff -up openssl-1.0.2a/crypto/asn1/a_verify.c.no-md5-verify openssl-1.0.2a/crypto/asn1/a_verify.c

--- openssl-1.0.2a/crypto/asn1/a_verify.c.no-md5-verify	2015-04-09 18:20:58.829680829 +0200

+++ openssl-1.0.2a/crypto/asn1/a_verify.c	2015-04-09 18:20:54.495580710 +0200

@@ -56,6 +56,9 @@

  * [including the GNU Public Licence.]

  */

+/* for secure_getenv */

+#define _GNU_SOURCE

+

 #include <stdio.h>

 #include <time.h>

@@ -171,6 +174,11 @@ int ASN1_item_verify(const ASN1_ITEM *it

         if (ret != 2)

             goto err;

         ret = -1;

+    } else if (mdnid == NID_md5

+               && secure_getenv("OPENSSL_ENABLE_MD5_VERIFY") == NULL) {

+        ASN1err(ASN1_F_ASN1_ITEM_VERIFY,

+                ASN1_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);

+        goto err;

     } else {

         const EVP_MD *type;

         type = EVP_get_digestbynid(mdnid);