Windows 10: Local privilege escalation via Windows I/O Manager

Discus and support Local privilege escalation via Windows I/O Manager in Windows 10 News to solve the problem; The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services to help... Discussion in 'Windows 10 News' started by Brink, Mar 14, 2019 at 3:57 PM.

  1. Brink Win User

    Local privilege escalation via Windows I/O Manager


    use something like this:

    Code: PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);… if ((Irp->RequestorMode != KernelMode) || (IrpSp->Flags & SL_FORCE_ACCESS_CHECK)) { // reject user mode requestors Status = STATUS_ACCESS_DENIED; }[/quote]
    Secondly, where the IO_FORCE_ACCESS_CHECK flag is already set in Options, we strongly recommend also setting the OBJ_FORCE_ACCESS_CHECK flag in ObjectAttributes. For example:

    Code: InitializeObjectAttributes( &ObjectAttributes, FileName, (OBJ_CASE_INSENSITIVE | OBJ_FORCE_ACCESS_CHECK), NULL, NULL); Status = IoCreateFileEx( &ObjectHandle, GENERIC_READ | SYNCHRONIZE, &ObjectAttributes, &IoStatusBlock, NULL, 0, 0, FILE_OPEN, 0, NULL, 0, CreateFileTypeNone, NULL, IO_FORCE_ACCESS_CHECK);[/quote]
    More generally, where a file create/open call may be made on behalf of a user-mode request, do not assume that the thread’s previous mode is UserMode or that this will be carried forward to the IRP’s requestor mode – set the OBJ_FORCE_ACCESS_CHECK flag in ObjectAttributes to make this explicit.

    Acknowledgements

    We’d like to thank James Forshaw for partnering with us on this vulnerability investigation, and for the many other high-quality vulnerability reports he has shared with the MSRC.

    Thanks also to Paul Brookes, Dileepa Kidambi Sudarsana, and Michelle Chen for their assistance in scaling the static analysis to the entire Windows codebase.

    Steven Hunter, MSRC Vulnerabilities & Mitigations team

    [/quote]
    Source: Local privilege escalation via the Windows I/O Manager: a variant finding collaboration Defense

    :)
     
  2. Steve_857 Win User

    Microsoft Windows 10 suffers from a pcap 10 local privilege escalation vulnerability.

    Original question 'is this a vulnerability' with existing Windows 10 build. Had noticed the exploit in the database of

    Operating System: Windows ≈ Packet Storm (website DB for exploits)

    The problem suggests that W10 User Settings can be challenged by select code allowing privileges to be altered.

    The exploit (not correction) is revealed by following code @;

    Windows 10 pcap Drive Local Privilege Escalation ≈ Packet Storm

    Thanks for your help.
     
  3. Steve_857 Win User
  4. Brink Win User

    Local privilege escalation via Windows I/O Manager

    Microsoft Windows task scheduler zero-day escalation vulnerability


    Read more:
     
Thema:

Local privilege escalation via Windows I/O Manager

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