*) Fix flaw if 'Server Key exchange message' is omitted from a TLS

Handshake which could lead to a cilent crash as found using the

Codenomicon TLS test suite (CVE-2008-1672) [Steve Henson, Mark Cox]

Index: ssl/s3_clnt.c

===================================================================

RCS file: /e/openssl/cvs/openssl/ssl/s3_clnt.c,v

retrieving revision 1.88.2.12

diff -u -r1.88.2.12 ssl/s3_clnt.c

--- ssl/s3_clnt.c 3 Nov 2007 13:07:39 -0000

+++ ssl/s3_clnt.c 22 May 2008 09:19:30 -0000

@@ -2061,6 +2061,13 @@

 			{

 			DH *dh_srvr,*dh_clnt;

+                        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;

+                                }

+

 			if (s->session->sess_cert->peer_dh_tmp != NULL)

 				dh_srvr=s->session->sess_cert->peer_dh_tmp;

 			else