Fix for TLS record tampering bug. A carefully crafted invalid 

handshake could crash OpenSSL with a NULL pointer exception.

Thanks to Anton Johansson for reporting this issues.

(CVE-2013-4353)

diff --git a/ssl/s3_both.c b/ssl/s3_both.c

index 1e5dcab..53b9390 100644

--- a/ssl/s3_both.c

+++ b/ssl/s3_both.c

@@ -210,7 +210,11 @@ static void ssl3_take_mac(SSL *s)

 	{

 	const char *sender;

 	int slen;

-

+	/* If no new cipher setup return immediately: other functions will

+	 * set the appropriate error.

+	 */

+	if (s->s3->tmp.new_cipher == NULL)

+		return;

 	if (s->state & SSL_ST_CONNECT)

 		{

 		sender=s->method->ssl3_enc->server_finished_label;