hacksysteam-HackSysExtremeVulnerableDriver/Driver/Source/ArbitraryOverwrite.c

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            HackSys Extreme Vulnerable Driver

Author : Ashfaq Ansari
Contact: ashfaq[at]payatu[dot]com
Website: http://www.payatu.com/

Copyright (C) 2011-2015 Payatu Technologies. 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:
    ArbitraryOverwrite.c

Abstract:
    This module implements the functions to demonstrate
    Arbitrary Memory Overwrite vulnerability.

--*/

#include "ArbitraryOverwrite.h"

#ifdef ALLOC_PRAGMA
    #pragma alloc_text(PAGE, TriggerArbitraryOverwrite)
    #pragma alloc_text(PAGE, ArbitraryOverwriteIoctlHandler)
#endif // ALLOC_PRAGMA

#pragma auto_inline(off)

/// <summary>
/// Trigger the Arbitrary Overwrite Vulnerability
/// </summary>
/// <param name="pUserModeWriteWhatWhere">The pointer to WRITE_WHAT_WHERE structure</param>
/// <returns>NTSTATUS</returns>
NTSTATUS TriggerArbitraryOverwrite(IN PWRITE_WHAT_WHERE pUserModeWriteWhatWhere) {
    NTSTATUS status = STATUS_SUCCESS;

    PAGED_CODE();

    __try {
        // Verify if the buffer resides in User Mode
        ProbeForRead((PVOID)pUserModeWriteWhatWhere,
                     sizeof(WRITE_WHAT_WHERE),
                     (ULONG)__alignof(WRITE_WHAT_WHERE));

        DbgPrint("[+] pUserModeWriteWhatWhere: 0x%p\n", pUserModeWriteWhatWhere);
        DbgPrint("[+] Size Of WRITE_WHAT_WHERE: 0x%X\n", sizeof(WRITE_WHAT_WHERE));
        DbgPrint("[+] pUserModeWriteWhatWhere->What: 0x%p\n", pUserModeWriteWhatWhere->What);
        DbgPrint("[+] pUserModeWriteWhatWhere->Where: 0x%p\n", pUserModeWriteWhatWhere->Where);

        #ifdef SECURE
            // Secure Note: This is secure because the developer is properly validating if address 
            // pointed by 'Where' and 'What' value resides in User mode by calling ProbeForRead() 
            // routine before performing the write operation
            ProbeForRead((PVOID)pUserModeWriteWhatWhere->Where,
                         sizeof(PULONG),
                         (ULONG)__alignof(PULONG));
            ProbeForRead((PVOID)pUserModeWriteWhatWhere->What,
                         sizeof(PULONG),
                         (ULONG)__alignof(PULONG));

            *(pUserModeWriteWhatWhere->Where) = *(pUserModeWriteWhatWhere->What);
        #else
            DbgPrint("[+] Triggering Arbitrary Overwrite\n");

            // Vulnerability Note: This is a vanilla Arbitrary Memory Overwrite vulnerability 
            // because the developer is writing value pointed by 'What' to a memory location 
            // pointed by 'Where' without properly validating if the values pointed by 'Where' 
            // and 'What' resides in User mode before performing the write operation
            *(pUserModeWriteWhatWhere->Where) = *(pUserModeWriteWhatWhere->What);
        #endif
    }
    __except (EXCEPTION_EXECUTE_HANDLER) {
        status = GetExceptionCode();
        DbgPrint("[-] Exception Code: 0x%X\n", status);
    }

    return status;
}

/// <summary>
/// Arbitrary Overwrite Ioctl Handler
/// </summary>
/// <param name="pIrp">The pointer to IRP</param>
/// <param name="pIoStackIrp">The pointer to IO_STACK_LOCATION structure</param>
/// <returns>NTSTATUS</returns>
NTSTATUS ArbitraryOverwriteIoctlHandler(IN PIRP pIrp, IN PIO_STACK_LOCATION pIoStackIrp) {
    NTSTATUS status = STATUS_UNSUCCESSFUL;
    PWRITE_WHAT_WHERE pUserModeWriteWhatWhere = NULL;

    UNREFERENCED_PARAMETER(pIrp);
    PAGED_CODE();

    pUserModeWriteWhatWhere = (PWRITE_WHAT_WHERE)
                               pIoStackIrp->Parameters.DeviceIoControl.Type3InputBuffer;

    if (pUserModeWriteWhatWhere) {
        status = TriggerArbitraryOverwrite(pUserModeWriteWhatWhere);
    }

    return status;
}

#pragma auto_inline()