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    FreeBSD security advisory relevant?

    Scheduled Pinned Locked Moved General pfSense Questions
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    • JeGrJ
      JeGr LAYER 8 Moderator
      last edited by JeGr

      Hi,

      we've got noticed by a customer, that they got a warning issued by the german BSI/CERT Bund (federal office for security in IT) about FreeBSD OS privilege eskalations and code executions, namely:

      • CVE-2024-45287, CVE-2024-45288
      • CVE-2024-41928
      • CVE-2024-42416, CVE-2024-43110, CVE-2024-45063, CVE-2024-8178
      • CVE-2024-43102
      • CVE-2024-32668

      Most of them as I see that are about bhyve components and hypervisor based so completely ignorable IMHO for pfSense/firewall usage in general. Two are a bit harder to take:

      https://www.freebsd.org/security/advisories/FreeBSD-SA-24:09.libnv.asc
      and
      https://www.freebsd.org/security/advisories/FreeBSD-SA-24:14.umtx.asc

      are quite vague in their "Impact" formulation about what exactly is necessary to exploit those. After reading them through, I'm almost sure they aren't relevant to a firewall usage or to pfSense specifically as the "libnv" one seems like a buffer overflow but needs user involvement(?) so - no local users, no threat vector. The umtx thing read more like a DoS through kernel panic but is so vague in how it's induced, that I'd guess there has to be a local user involved again.

      So my guess would be none of those are endangering pfSense, but I'd like to have a few eyes more on that in case I'm reading that wrong.

      Thanks & Cheers,
      \jens

      PS: in case someone wants the source: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2024-2056 - sometimes you have to open the link two times, as the first one gets you to the wrong page. I know, it's strange but hey, federal gov is weird sometimes ;)

      Don't forget to upvote 👍 those who kindly offered their time and brainpower to help you!

      If you're interested, I'm available to discuss details of German-speaking paid support (for companies) if needed.

      1 Reply Last reply Reply Quote 2
      • stephenw10S
        stephenw10 Netgate Administrator
        last edited by

        They will be in the 24.08 (next release) but I agree, neither of those look like problem for pfSense directly. In my opinion at least, I await higher level input. 😉

        JeGrJ 1 Reply Last reply Reply Quote 3
        • JeGrJ
          JeGr LAYER 8 Moderator @stephenw10
          last edited by

          @stephenw10 said in FreeBSD security advisory relevant?:

          They will be in the 24.08 (next release) but I agree, neither of those look like problem for pfSense directly. In my opinion at least, I await higher level input. 😉

          It would be real important to have clarity on that matter.

          As that is a BSI / federal note to patch systems with a CVSS score of >=9 that means systems in critical environments HAVE to patch in 10 days or less and that timeline is nearing fast. So if the CVEs are all irrelevant, that's fine but we'd need a statement for this that I can rely on.

          Thanks!

          Don't forget to upvote 👍 those who kindly offered their time and brainpower to help you!

          If you're interested, I'm available to discuss details of German-speaking paid support (for companies) if needed.

          1 Reply Last reply Reply Quote 1
          • stephenw10S
            stephenw10 Netgate Administrator
            last edited by

            Let me see what we can do here....

            J 1 Reply Last reply Reply Quote 1
            • J
              jwt Netgate @stephenw10
              last edited by

              @stephenw10 and @JeGr

              CVE-2024-41928 is https://www.freebsd.org/security/advisories/FreeBSD-SA-24:10.bhyve.asc

              If you're not running bhyve on pfSense (and by default you are not) this does not affect you.

              CVE-2024-42416, CVE-2024-43110, CVE-2024-45063, CVE-2024-8178 are https://www.freebsd.org/security/advisories/FreeBSD-SA-24:11.ctl.asc

              If you're not running bhyve or do not export iSCSI targets on pfSense, (and by default, you are not) this does not affect you. If you are running bhyve and do not make use of virtuio_scsi, this does not affect you.

              CVE-2024-32668 is https://www.freebsd.org/security/advisories/FreeBSD-SA-24:12.bhyve.asc

              Once again, If you're not running bhyve on pfSense (and by default you are not) this does not affect you.

              So now we're down to these two SAs:

              CVE-2024-45287, CVE-2024-45288 are https://www.freebsd.org/security/advisories/FreeBSD-SA-24:09.libnv.asc

              CVE-2024-45287 is scored 7.3 by NIST NVD
              CVE-2024-45288 is not (yet) scored by NISD NVD

              This SA involves libnv. Exploiting it requires running code on the box. Given the sub-9.0 score and the difficulty of exploiting this, I consider it low risk.

              And finally, CVE-2024-43102 is https://www.freebsd.org/security/advisories/FreeBSD-SA-24:14.umtx.asc

              CVE-2024-43102 is scored 10.0 by NIST NVD

              The _umtx_op() system call is non-standard and is used by the 1:1 Threading Library (libthr, -lthr) to implement IEEE Std 1003.1-2001 ("POSIX.1") pthread(3) functionality. We're still analyzing this, but it's the only one of any concern.

              As @stephenw10 notes, these are all in the (pending) 24.08 release.

              Since you're in Germany,... I wonder what the German BSI/CERT Bund thinks about OPNonSense reverting FreeBSD-SA-24:05.pf in 24.7.4 (I wonder if they even know?). The excuse offered is really weak and political.

              S 1 Reply Last reply Reply Quote 3
              • S
                slu @jwt
                last edited by

                @jwt said in FreeBSD security advisory relevant?:

                As @stephenw10 notes, these are all in the (pending) 24.08 release.

                ..and 2.8.0 CE?

                pfSense Gold subscription

                1 Reply Last reply Reply Quote 0
                • stephenw10S
                  stephenw10 Netgate Administrator
                  last edited by

                  Not yet in internal 2.8 builds but would be before any release.

                  1 Reply Last reply Reply Quote 2
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