commit 4ad43d511f6cf064c66eb4bfd0fb0919b5dd8a86

Author: Dr. Stephen Henson <steve@openssl.org>

Date:   Thu May 29 15:00:05 2014 +0100

    Fix CVE-2014-3470

    Check session_cert is not NULL before dereferencing it.

diff --git a/ssl/s3_clnt.c b/ssl/s3_clnt.c

index d35376d..4324f8d 100644

--- a/ssl/s3_clnt.c

+++ b/ssl/s3_clnt.c

@@ -2511,6 +2511,13 @@ int ssl3_send_client_key_exchange(SSL *s)

 			int ecdh_clnt_cert = 0;

 			int field_size = 0;

+			if (s->session->sess_cert == NULL) 

+				{

+				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);

+				SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);

+				goto err;

+				}

+

 			/* Did we send out the client's

 			 * ECDH share for use in premaster

 			 * computation as part of client certificate?