From 3bec00196f7a256cad723c97f51fb067a6473d25 Mon Sep 17 00:00:00 2001 From: mancha Date: Mon, 2 Jun 2014 Subject: CVE-2014-3466 This is a backport adaptation for use with GnuTLS 2.10.5. 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 @@ -1749,7 +1749,7 @@ _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 @@ -60,7 +60,7 @@ 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 + mini-x509-rehandshake 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 +#endif + +#include +#include + +#if defined(_WIN32) + +int main() +{ + exit(77); +} + +#else + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +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 */