Exploit-DB #97
Description: Microsoft Windows - 'RPC DCOM' Scanner (MS03-039)
Type: remote
Platform: windows
Date: 2003-09-12
Author: Doke Scott

Exploit:
/*
dcom2_scanner.c

scan for second dcom vulnerability (MS03-039)

by Doke Scott, doke at udel.edu, 10 Sep 2003

based on work by:
 *  buildtheb0x presents : dcom/rpc scanner
 *  ---------------------------------------
 *  by: kid and farp

 and on packet sniffs of MS's dcom2 scanner

*/

#define d_dcom_scan_timeout 5  // max seconds for individual dcom scan

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <netdb.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>

#define null NULL


// for sun spro cc wierdness?  seg faults without this
#define my_inet_ntoa(ip) inet_ntoa( *( (struct in_addr *) &ip ) ) 



static char *program_name;
static int verbose = 0;
int dcom_scan_timeout = d_dcom_scan_timeout;
volatile int timed_out = 0;
volatile int dcomsockfd = 0;

extern char *optarg;
extern int optind, opterr, optopt;





void 
print_hex( unsigned char *data, int len ) { 
    int i, j;
    char alphastr[ 17 ];

    for ( i = 0, j = 0; i < len; i++, j++ ) { 
	if ( j == 0 ) { 
	    alphastr[ j ] = isprint( data[i] ) ? data[i] : '.';
	    printf( "%04x  %02x", i, data[ i ] & 0xff );
	    }
	else if ( j == 15 ) { 
	    alphastr[ j ] = isprint( data[i] ) ? data[i] : '.';
	    alphastr[ j + 1 ] = 0;
	    printf( " %02x   %s\n", data[ i ] & 0xff, alphastr );
	    j = -1;
	    }
	else { 
	    alphastr[ j ] = isprint( data[i] ) ? data[i] : '.';
	    printf( " %02x", data[ i ] & 0xff );
	    }
	}
    if ( j )  { 
	alphastr[ j + 1 ] = 0;
	for ( ; j < 16; j++ ) 
	    printf( "   " ); 
	printf( "   %s\n", alphastr );
	}
    }




/*
 * based on:
 *
 *  buildtheb0x presents : dcom/rpc scanner
 *  ---------------------------------------
 *
 *
 *  by: kid and farp
 *
 *  greets: kajun, phr_, dvdman, Sam, flatline, #nanog, synD, and to all danny'
s waitress's
 *
 */

#define DEST_PORT 135

///////////////////////////
// first request packet, bind request

// from dcom1 exploit code
unsigned char bindstr[]={
    0x05, 0x00, 0x0B, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
    0x7F, 0x00, 0x00, 0x00, 0xD0, 0x16, 0xD0, 0x16, 0x00, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0xa0, 0x01, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46,
    0x00, 0x00, 0x00, 0x00, 0x04, 0x5D, 0x88, 0x8A, 0xEB, 0x1C, 0xC9, 0x11,
    0x9F, 0xE8, 0x08, 0x00, 0x2B, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00
    };

// from dcom1 dcom_scanz
unsigned char fear1[] = {
    0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
    0x09, 0x00, 0x00, 0x00, 0xd0, 0x16, 0xd0, 0x16, 0x00, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x01, 0x00, 0xb8, 0x4a, 0x9f, 0x4d,
    0x1c, 0x7d, 0xcf, 0x11, 0x86, 0x1e, 0x00, 0x20, 0xaf, 0x6e, 0x7c, 0x57,
    0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11,
    0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00
    };

// sniffed from dcom2 scanner, when scanning patched machine
unsigned char request1[] = {
    0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0xd0, 0x16, 0xd0, 0x16, 0x00, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0xa0, 0x01, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46,
    0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11,
    0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00
    };

unsigned char expected1[] = { 
    0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00, 0x3c, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0xd0, 0x16, 0xd0, 0x16, 0x28, 0x57, 0x00, 0x00,
    0x04, 0x00, 0x31, 0x33, 0x35, 0x00, 0x02, 0x00, 0x01, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11,
    0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00,
    };


///////////////////////////
// second request packet 

// from dcom1 exploit code
unsigned char exploit_request1[]={
    0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00,
    0x09, 0x00, 0x00, 0x00, 0x66, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
    0x05, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x6b, 0xac, 0xd8, 0x08, 0x2f, 0x2e, 0x03, 0x48, 0xaa, 0xdc, 0xc1, 0x6a,
    0x62, 0xfb, 0xeb, 0x98, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x91, 0x7b, 0x5a,
    0x00, 0xff, 0xd0, 0x11, 0xa9, 0xb2, 0x00, 0xc0, 0x4f, 0xb6, 0xe6, 0xfc,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
    0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x38, 0xff, 0x0a, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x01, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x07, 0x00
    };


// from dcom1 dcom_scanz
unsigned char fear2[] = {
    0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x00,
    0x09, 0x00, 0x00, 0x00, 0x66, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
    0x05, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x6b, 0xac, 0xd8, 0x08, 0x2f, 0x2e, 0x03, 0x48, 0xaa, 0xdc, 0xc1, 0x6a,
    0x62, 0xfb, 0xeb, 0x98, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x91, 0x7b, 0x5a,
    0x00, 0xff, 0xd0, 0x11, 0xa9, 0xb2, 0x00, 0xc0, 0x4f, 0xb6, 0xe6, 0xfc,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
    0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00, 0x38, 0xff, 0x0a, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x01, 0x00, 0x00, 0x00,
    0x01, 0x00, 0x00, 0x00, 0x07, 0x00 
    };

// sniffed from dcom2 scann