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  • FreeBSD Security Advisory FreeBSD-SA-24:17.bhyve

    From FreeBSD Security Advisories@21:1/5 to All on Tue Oct 29 22:00:11 2024
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    ============================================================================= FreeBSD-SA-24:17.bhyve Security Advisory
    The FreeBSD Project

    Topic: Multiple issues in the bhyve hypervisor

    Category: core
    Module: bhyve
    Announced: 2024-10-29
    Credits: Synacktiv
    Sponsored by: The FreeBSD Foundation, The Alpha-Omega Project
    Affects: All supported versions of FreeBSD.
    Corrected: 2024-10-19 15:42:15 UTC (stable/14, 14.1-STABLE)
    2024-10-29 18:45:36 UTC (releng/14.1, 14.1-RELEASE-p6)
    2024-10-19 15:43:46 UTC (stable/13, 13.4-STABLE)
    2024-10-29 18:49:55 UTC (releng/13.4, 13.4-RELEASE-p2)
    2024-10-29 18:53:41 UTC (releng/13.3, 13.3-RELEASE-p8)
    CVE Name: CVE-2024-51562, CVE-2024-51563, CVE-2024-51564,
    CVE-2024-51565, CVE-2024-51565

    For general information regarding FreeBSD Security Advisories,
    including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>.

    I. Background

    bhyve(8) is a hypervisor that runs guest operating systems inside a virtual machine.

    II. Problem Description

    Several vulnerabilities were found in the bhyve hypervisor's device models.

    The NVMe driver function nvme_opc_get_log_page is vulnerable to a buffer over- read from a guest-controlled value. (CVE-2024-51562)

    The virtio_vq_recordon function is subject to a time-of-check to time-of-use (TOCTOU) race condition. (CVE-2024-51563)

    A guest can trigger an infinite loop in the hda audio driver.
    (CVE-2024-51564)

    The hda driver is vulnerable to a buffer over-read from a guest-controlled value. (CVE-2024-51565)

    The NVMe driver queue processing is vulernable to guest-induced infinite
    loops. (CVE-2024-51565)

    III. Impact

    Malicious guest virtual machines may be able to perform a denial of service (DoS) of the bhyve host, and may read memory within the bhyve process that
    they should not be able to access.

    IV. Workaround

    No workaround is available. Virtual machines that provide none of the NVMe, virtio, and hda devices to the guest are not vulnerable.

    V. Solution

    Upgrade your vulnerable system to a supported FreeBSD stable or
    release / security branch (releng) dated after the correction date.
    Restart bhyve processes, or reboot the system.

    Perform one of the following:

    1) To update your vulnerable system via a binary patch:

    Systems running a RELEASE version of FreeBSD on the amd64 or arm64 platforms, or the i386 platform on FreeBSD 13, can be updated via the freebsd-update(8) utility:

    # freebsd-update fetch
    # freebsd-update install

    2) To update your vulnerable system via a source code patch:

    The following patches have been verified to apply to the applicable
    FreeBSD release branches.

    a) Download the relevant patch from the location below, and verify the
    detached PGP signature using your PGP utility.

    # fetch https://security.FreeBSD.org/patches/SA-24:17/bhyve.patch
    # fetch https://security.FreeBSD.org/patches/SA-24:17/bhyve.patch.asc
    # gpg --verify bhyve.patch.asc

    b) Apply the patch. Execute the following commands as root:

    # cd /usr/src
    # patch < /path/to/patch

    c) Recompile the operating system using buildworld and installworld as described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.

    Restart the applicable bhyve processes, or reboot the system.

    VI. Correction details

    This issue is corrected as of the corresponding Git commit hash in the following stable and release branches:

    Branch/path Hash Revision
    - ------------------------------------------------------------------------- stable/14/ 86ba5941b132 stable/14-n269162 releng/14.1/ fcd9a2d8a5bd releng/14.1-n267723 stable/13/ df1a36fdfae6 stable/13-n258536 releng/13.4/ 5d07a7e902fa releng/13.4-n258265 releng/13.3/ adb7b541aea1 releng/13.3-n257475
    - -------------------------------------------------------------------------

    Run the following command to see which files were modified by a
    particular commit:

    # git show --stat <commit hash>

    Or visit the following URL, replacing NNNNNN with the hash:

    <URL:https://cgit.freebsd.org/src/commit/?id=NNNNNN>

    To determine the commit count in a working tree (for comparison against
    nNNNNNN in the table above), run:

    # git rev-list --count --first-parent HEAD

    VII. References

    <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-51562> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-51563> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-51564> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-51565> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-51565>

    The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-24:17.bhyve.asc> -----BEGIN PGP SIGNATURE-----

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