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    XSA-468: multiple Windows PV driver vulnerabilities - update now!

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    • D Offline
      dinhngtu Vates 🪐 XCP-ng Team @Tristis Oris
      last edited by dinhngtu

      @TrapoSAMA Where did you get the fixed Xen drivers from? Please see my answer below.

      @Tristis-Oris I don't think there's any fixed drivers out there that works on 2012/2012R2. (Microsoft killed support for that some time ago in their new Windows driver kit, and support for Windows 8 was removed upstream since Nov 2023)

      Seeing that 2012/2012R2 are still quite popular I'll try to make a mitigation script for those.

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      • Tristis OrisT Offline
        Tristis Oris Top contributor
        last edited by Tristis Oris

        it looks we need v9.2.3 for 2012. https://docs.xenserver.com/en-us/xenserver/8/vms/windows/vm-tools.html#923

        i have old citrix tools 9.3.1, XO detect them.

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        • Tristis OrisT Tristis Oris referenced this topic
        • D Offline
          dinhngtu Vates 🪐 XCP-ng Team
          last edited by dinhngtu

          Hi all,

          I've uploaded a version of the mitigation script Install-XSA468Workaround-Win7.ps1 with unofficial support for down to Windows 7/2008R2 and 8/8.1/2012/2012R2.

          Reminder: this is purely unofficial support and not tested on all listed OSes yet. The mitigation script itself is meant as a last resort only when you absolutely cannot update; it does not mitigate all vulnerabilities and it does not replace updating your drivers.

          @Tristis-Oris @TrapoSAMA

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          • G Offline
            Greg_E
            last edited by

            Just an FYI,

            So far the only 2022 VM I've updated has created new network adapters which defaulted to DHCP, and it has marked the system drive as removeable, which we saw with 2025 almost a year ago.

            Make sure to write down your static IP addresses before beginning.

            This is from installing Xenserver MA 9.4.1-160

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            • M Offline
              manilx @Greg_E
              last edited by manilx

              @Greg_E From 6 Windows Server 2022 VM's this happened on 3 here.

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              • stormiS Offline
                stormi Vates 🪐 XCP-ng Team
                last edited by

                Thanks for the feedback. Let's add a notice in the docs, @dinhngtu?

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                • G Offline
                  Greg_E
                  last edited by

                  Here is some info on setting the disks so that they are no longer removeable, I think the last time I did this I just needed the registry edit to fix it.

                  https://xcp-ng.org/forum/topic/9987/secondary-virtual-disks-appearing-as-removable-on-windows-11-vms/6?_=1748973746267

                  I'm kind of stuck waiting to migrate my firewall before I can get back to fixing my VMs. I only have 5 and one of them is not showing the warning. All of them should have been getting updates from the management agent or from Windows Update, not sure why only 4 give the warning.

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                  • A Offline
                    Andrew Top contributor @dinhngtu
                    last edited by

                    @dinhngtu @olivierlambert @stormi I think the Windows VM's with old tools should show up in the Dashboard Heath report under "Guest Tools status"...

                    stormiS 1 Reply Last reply Reply Quote 0
                    • stormiS Offline
                      stormi Vates 🪐 XCP-ng Team @Andrew
                      last edited by stormi

                      @Andrew I've thought about it and I agree on the principle as there's already a section about guest tools there, but we have put enough pressure on the XO team to make them release the helpful features in time to help users detect vulnerable VMs, on XOA's stable update channel, so it might be wiser to wait for XO6 for such alert to be in a centralized place about guest tools.

                      CC @lsouai-vates

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                      • stormiS Offline
                        stormi Vates 🪐 XCP-ng Team @stormi
                        last edited by stormi

                        said in XSA-468: multiple Windows PV driver vulnerabilities - update now!:

                        @Tristis-Oris

                        1. We do plan a way to remove the warning for VMs that you would choose.

                        That's now done and will be included in the next update to the latest update channel for XOA. VMs with the HIDE_XSA468 tag will not be included in the vulnerability detection.

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