From e47d30e272a0b3977db8dae09327acad45b931d8 Mon Sep 17 00:00:00 2001
From: mancha <mancha1@zoho.com>
Date: Sun, 1 Jun 2014
Subject: CVE-2014-3466

This is a backport adaptation for use with GnuTLS 2.12.23.

Relevant upstream commit(s):
-------------------------
https://gitorious.org/gnutls/gnutls/commit/688ea6428a432c
https://gitorious.org/gnutls/gnutls/commit/a7be326f0e33cf

---
 lib/gnutls_handshake.c  |    2 
 tests/Makefile.am       |    2 
 tests/long-session-id.c |  268 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 270 insertions(+), 2 deletions(-)

--- a/lib/gnutls_handshake.c
+++ b/lib/gnutls_handshake.c
@@ -1797,7 +1797,7 @@ _gnutls_read_server_hello (gnutls_sessio
   DECR_LEN (len, 1);
   session_id_len = data[pos++];
 
-  if (len < session_id_len)
+  if (len < session_id_len || session_id_len > TLS_MAX_SESSION_ID_SIZE)
     {
       gnutls_assert ();
       return GNUTLS_E_UNSUPPORTED_VERSION_PACKET;
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -64,7 +64,7 @@ ctests = simple gc set_pkcs12_cred certd
 	crq_key_id x509sign-verify cve-2009-1415 cve-2009-1416		\
 	crq_apis init_roundtrip pkcs12_s2k_pem dn2 mini-eagain		\
 	nul-in-x509-names x509_altname pkcs12_encode mini-x509		\
-	mini-x509-rehandshake rng-fork x509cert gendh
+	mini-x509-rehandshake rng-fork x509cert gendh long-session-id
 
 if ENABLE_OPENSSL
 ctests +=  openssl
--- /dev/null
+++ b/tests/long-session-id.c
@@ -0,0 +1,268 @@
+/*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ *
+ * Author: Nikos Mavrogiannopoulos
+ *
+ * This file is part of GnuTLS.
+ *
+ * GnuTLS is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuTLS is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GnuTLS; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#if defined(_WIN32)
+
+int main()
+{
+	exit(77);
+}
+
+#else
+
+#include <string.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#include <gnutls/gnutls.h>
+#include <signal.h>
+
+static int debug = 0;
+static void terminate(int);
+
+/* This program tests the robustness of record
+ * decoding.
+ */
+
+static void client_log_func(int level, const char *str)
+{
+	fprintf(stderr, "client|<%d>| %s", level, str);
+}
+
+static unsigned char server_cert_pem[] =
+    "-----BEGIN CERTIFICATE-----\n"
+    "MIICVjCCAcGgAwIBAgIERiYdMTALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
+    "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTIxWhcNMDgwNDE3MTMyOTIxWjA3MRsw\n"
+    "GQYDVQQKExJHbnVUTFMgdGVzdCBzZXJ2ZXIxGDAWBgNVBAMTD3Rlc3QuZ251dGxz\n"
+    "Lm9yZzCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA17pcr6MM8C6pJ1aqU46o63+B\n"
+    "dUxrmL5K6rce+EvDasTaDQC46kwTHzYWk95y78akXrJutsoKiFV1kJbtple8DDt2\n"
+    "DZcevensf9Op7PuFZKBroEjOd35znDET/z3IrqVgbtm2jFqab7a+n2q9p/CgMyf1\n"
+    "tx2S5Zacc1LWn9bIjrECAwEAAaOBkzCBkDAMBgNVHRMBAf8EAjAAMBoGA1UdEQQT\n"
+    "MBGCD3Rlc3QuZ251dGxzLm9yZzATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHQ8B\n"
+    "Af8EBQMDB6AAMB0GA1UdDgQWBBTrx0Vu5fglyoyNgw106YbU3VW0dTAfBgNVHSME\n"
+    "GDAWgBTpPBz7rZJu5gakViyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAaFEPTt+7\n"
+    "bzvBuOf7+QmeQcn29kT6Bsyh1RHJXf8KTk5QRfwp6ogbp94JQWcNQ/S7YDFHglD1\n"
+    "AwUNBRXwd3riUsMnsxgeSDxYBfJYbDLeohNBsqaPDJb7XailWbMQKfAbFQ8cnOxg\n"
+    "rOKLUQRWJ0K3HyXRMhbqjdLIaQiCvQLuizo=\n" "-----END CERTIFICATE-----\n";
+
+const gnutls_datum_t server_cert = { server_cert_pem,
+	sizeof(server_cert_pem)
+};
+
+static unsigned char server_key_pem[] =
+    "-----BEGIN RSA PRIVATE KEY-----\n"
+    "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"
+    "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"
+    "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"
+    "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"
+    "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"
+    "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"
+    "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"
+    "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"
+    "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"
+    "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"
+    "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"
+    "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"
+    "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"
+    "-----END RSA PRIVATE KEY-----\n";
+
+const gnutls_datum_t server_key = { server_key_pem,
+	sizeof(server_key_pem)
+};
+
+
+/* A very basic TLS client, with anonymous authentication.
+ */
+
+static void client(int fd, const char *prio)
+{
+	int ret;
+	gnutls_anon_client_credentials_t anoncred;
+	gnutls_certificate_credentials_t x509_cred;
+	gnutls_session_t session;
+	/* Need to enable anonymous KX specifically. */
+
+	gnutls_global_init();
+
+	if (debug) {
+		gnutls_global_set_log_function(client_log_func);
+		gnutls_global_set_log_level(7);
+	}
+
+	gnutls_anon_allocate_client_credentials(&anoncred);
+	gnutls_certificate_allocate_credentials(&x509_cred);
+
+	/* Initialize TLS session
+	 */
+	gnutls_init(&session, GNUTLS_CLIENT);
+
+	/* Use default priorities */
+	gnutls_priority_set_direct(session, prio, NULL);
+
+	/* put the anonymous credentials to the current session
+	 */
+	gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
+	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
+
+	gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) fd);
+
+	/* Perform the TLS handshake
+	 */
+	do {
+		ret = gnutls_handshake(session);
+	}
+	while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+
+	if (ret < 0) {
+		fprintf(stderr, "client: Handshake failed (expected)\n");
+		gnutls_perror(ret);
+		exit(0);
+	} else {
+		if (debug)
+			fprintf(stderr, "client: Handshake was completed\n");
+	}
+
+	close(fd);
+
+	gnutls_deinit(session);
+
+	gnutls_anon_free_client_credentials(anoncred);
+	gnutls_certificate_free_credentials(x509_cred);
+
+	gnutls_global_deinit();
+}
+
+
+/* These are global */
+pid_t child;
+
+static void terminate(int ret)
+{
+	kill(child, SIGTERM);
+	exit(ret);
+}
+
+static void server(int fd, const char *prio)
+{
+	int ret;
+	uint8_t id[255];
+	uint8_t buffer[] = "\x16\x03\x00\x01\x25"
+		"\x02\x00\x01\x21"
+		"\x03\x00"/*Server Version */
+		/*Random*/"\x00\x00\x00\x00\x01\x00\x00\x00\x00\x01\x00\x00\x00\x00\x01\x00\x00\x00\x00\x01\x00\x00\x00\x00\x01\x00\x00\x00\x00\x01\x00\x00"
+		/*SessionID*/"\xfe";
+
+	ret = read(fd, id, sizeof(id));
+	if (ret < 0) {
+		abort();
+	}
+
+	ret = write(fd, buffer, sizeof(buffer));
+	if (ret < 0) {
+		return;
+	}
+
+	memset(id, 0xff, sizeof(id));
+	ret = write(fd, id, sizeof(id));
+	if (ret < 0) {
+		return;
+	}
+
+	memset(id, 0xff, sizeof(id));
+	ret = write(fd, id, sizeof(id));
+	if (ret < 0) {
+		return;
+	}
+	sleep(3);
+
+	return;
+}
+
+static void start(const char *prio)
+{
+	int fd[2];
+	int ret;
+
+	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+	if (ret < 0) {
+		perror("socketpair");
+		exit(1);
+	}
+
+	child = fork();
+	if (child < 0) {
+		perror("fork");
+		exit(1);
+	}
+
+	if (child) {
+		/* parent */
+		close(fd[1]);
+		server(fd[0], prio);
+		kill(child, SIGTERM);
+	} else {
+		close(fd[0]);
+		client(fd[1], prio);
+		exit(0);
+	}
+}
+
+static void ch_handler(int sig)
+{
+	int status, ret = 0;
+	wait(&status);
+	if (WEXITSTATUS(status) != 0 ||
+	    (WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV)) {
+		if (WIFSIGNALED(status)) {
+			fprintf(stderr, "Child died with sigsegv\n");
+			ret = 1;
+		} else {
+			fprintf(stderr, "Child died with status %d\n",
+			     WEXITSTATUS(status));
+		}
+		terminate(ret);
+	}
+	return;
+}
+
+int main(int argc, char **argv)
+{
+	signal(SIGCHLD, ch_handler);
+
+	if (argc > 1)
+		debug = 1;
+
+	start("NORMAL");
+	return 0;
+}
+
+#endif				/* _WIN32 */