TicketNo:DTS2020042400397

Description:openssl bugfix CVE-2020-1967
Team:OTHERS
Feature or Bugfix:Bugfix
Binary Source:No
PrivateCode(Yes/No):No

Change-Id: I1758c03b34d28c1bd9253c3943b77a86ed795133
Reviewed-on: http://mgit-tm.rnd.huawei.com/8972328Tested-by: Npublic jenkins <public_jenkins@notesmail.huawei.com>
Reviewed-by: Ndongjinguang 00268009 <dongjinguang@huawei.com>
Reviewed-by: Nhouyuezhou 00386575 <hou@huawei.com>
Reviewed-by: Nlinyibin 00246405 <linyibin@huawei.com>

ssl/t1_lib.c

@@ -2099,7 +2099,7 @@ static int tls1_check_sig_alg(SSL *s, X509 *x, int default_nid)
         sigalg = use_pc_sigalgs
                  ? tls1_lookup_sigalg(s->s3->tmp.peer_cert_sigalgs[i])
                  : s->shared_sigalgs[i];
-        if (sig_nid == sigalg->sigandhash)
+        if (sigalg != NULL && sig_nid == sigalg->sigandhash)
             return 1;
     }
     return 0;