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

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    • D Offline
      DustinB @conitrade-as
      last edited by

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

      Here is another interesting fact: After installing the new tools (v.9.4.1) my static routes in Windows were all gone. ⚠ Definitively a good way to loose connectivity to your domain controller. And that's why you have good monitoring and store things in Ansible et al. ... 🙂

      Statically assign, but keep your DHCP server with reservations to address these types of issues 🙂

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      • M Offline
        manilx @DustinB
        last edited by

        @DustinB Did run usr/bin/create-guest-templates but tepmlates are gone here also.

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        • D Offline
          DustinB @manilx
          last edited by

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

          @DustinB Did run usr/bin/create-guest-templates but tepmlates are gone here also.

          I did not, I'm in the middle of an AV/EDR migration and this way added to the list of things to touch while I was on the systems.

          To me the templates are a minor inconvenience as we aren't constantly adding VMs.

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          • C Offline
            conitrade-as @DustinB
            last edited by

            @DustinB Not IP assignments, I am talking about static routes. See e.g. https://learn.microsoft.com/en-us/powershell/module/nettcpip/get-netroute

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            • D Offline
              DustinB @conitrade-as
              last edited by

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

              @DustinB Not IP assignments, I am talking about static routes. See e.g. https://learn.microsoft.com/en-us/powershell/module/nettcpip/get-netroute

              Okay.... what...

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              • pdoniasP Offline
                pdonias Vates 🪐 XO Team @DustinB
                last edited by pdonias

                Hi! Regarding the templates issue, we're working on a fix on branch pierre-fix-xsa468-test master. Would anyone having the issue be available to test it?

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                • C Offline
                  conitrade-as @pdonias
                  last edited by

                  @pdonias Sure thing. I can test it in my test environment.

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                  • C Offline
                    conitrade-as @conitrade-as
                    last edited by

                    Just did a couple more tests. Here are my findings:

                    • Upgrading the tools from v9.3.3 to v9.4.1 does preserve the routing table.
                    • Upgrading the tools from v9.2.1 to v9.4.1 does not preserve the routing table.

                    Here are a couple of powershell commands used for testing:

                    Get-NetRoute -PolicyStore PersistentStore
Get-NetAdapter
New-NetRoute -DestinationPrefix "10.10.0.0/24" -InterfaceIndex <ifIndex> -NextHop 10.10.0.254
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                    • D Offline
                      dinhngtu Vates 🪐 XCP-ng Team @conitrade-as
                      last edited by dinhngtu

                      @conitrade-as This is a known issue when upgrading from XS WinPV 9.3.0 and below: https://support.citrix.com/s/article/CTX235403-updates-to-xenserver-vm-tools-for-windows-for-xenserver-and-citrix-hypervisor

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                      • C Offline
                        conitrade-as @dinhngtu
                        last edited by

                        @dinhngtu Thanks for the pointer. Yes, it seems that the root cause also makes routes disappear. Howerver, that the routing information is gone is sadly not mentioned explicitly. May be something to add to your docs as well.

                        Caution when updating tools: Verify interface IP configuration and routing entries.

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

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

                          Hi,

                          It is not clear to me if the old XCP-ng PV drivers (8.2.2.200-RC1) are affected or not. How should we proceed if they are?

                          Do others share this feeling and have this question after re-reading the whole announcement?

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                          • D Offline
                            DustinB @stormi
                            last edited by

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

                            Do others share this feeling and have this question after re-reading the whole announcement?

                            No it's pretty clear, update the drivers on everything as all versions are susceptible.

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                            • F Offline
                              flakpyro @conitrade-as
                              last edited by

                              @dinhngtu

                              One thing i've noticed since upgrading to tools version 9.4.1 is that the version installed will display properly in XOA up until the VM is migrated. After a migration it changed to just "Management agent detected" with no version shown. Not sure if this is an XO issue or an issue with the tools itself?

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

                                @flakpyro There's also a chance this is a XAPI issue. CC @andriy.sultanov

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

                                  @flakpyro What do you get from this command?

                                  xe vm-param-get uuid=<uuid> param-name=PV-drivers-version

                                  @stormi It sounds like the issue we encountered in CI with the management agent not restoring version numbers after migration.

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                                  • F Offline
                                    flakpyro @dinhngtu
                                    last edited by

                                    @dinhngtu here is the output from one of the VMs recently migrated:

                                    xe vm-param-get uuid=261634d9-b67c-1048-b028-2e33abea6329 param-name=PV-drivers-version
micro: -1; xennet: XenServer 9.1.7.65 ; xeniface: XenServer 9.1.12.94 ; xenvif: XenServer 9.1.13.107 ; xenvbd: XenServer 9.1.9.82 ; xenbus: XenServer 9.1.11.115
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                                    • A Offline
                                      archw @flakpyro
                                      last edited by

                                      @flakpyro
                                      I've found a similar issue with all VMs I update. After I update and reboot, it stays at "Management agent detected" with no version shown.

                                      Once I reboot a second time, it stays at "Management agent detected" with "Management agent 9.4.1-160 detected"

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                                      • C Offline
                                        conitrade-as @archw
                                        last edited by

                                        @archw I can confirm. That is exactly the behaviour I see with my Windows VMs.

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                                        • T Offline
                                          TrapoSAMA
                                          last edited by

                                          HI!

                                          Upgrade Xentools take two reboot for complete! if you have old tools installed isbetter upgrade to 7 and after to 9

                                          About this last somebody have some issue upgrading windows server 2012R2?

                                          Thx

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

                                            @TrapoSAMA Windows Server 2012/2012R2 are no longer supported by our (XCP-ng) drivers nor by XenServer drivers.

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