1. Forum
  2. Usenet
  3. COMP.UNIX.BSD.FREEBSD.ANN

  • [FreeBSD-Announce] FreeBSD Security Advisory FreeBSD-SA-20:05.if_oce_io

    From FreeBSD Security Advisories@21:1/5 to All on Thu Mar 19 18:00:02 2020
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA512

    ============================================================================= FreeBSD-SA-20:05.if_oce_ioctl Security Advisory
    The FreeBSD Project

    Topic: Insufficient oce(4) ioctl(2) privilege checking

    Category: core
    Module: oce(4)
    Announced: 2020-03-19
    Credits: Ilja Van Sprundel
    Affects: All supported versions of FreeBSD.
    Corrected: 2019-12-26 16:56:42 UTC (stable/12, 12.1-STABLE)
    2020-03-19 16:48:29 UTC (releng/12.1, 12.1-RELEASE-p3)
    2019-12-26 16:58:11 UTC (stable/11, 11.3-STABLE)
    2020-03-19 16:48:29 UTC (releng/11.3, 11.3-RELEASE-p7)
    CVE Name: CVE-2019-15876

    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

    The primary interface used for network driver configuration is ioctl(2). Several ioctl(2) commands are reserved for driver-specific purposes. For instance, a driver may use one of these ioctls to implement an interface for updating device firmware.

    II. Problem Description

    The driver-specific ioctl(2) command handlers in oce(4) failed to check
    whether the caller has sufficient privileges to perform the corresponding operation.

    III. Impact

    The oce(4) handler permits unprivileged users to send passthrough commands to device firmware.

    IV. Workaround

    No workaround is available. Systems that do not contain devices driven by oce(4) are unaffected.

    V. Solution

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

    Perform one of the following:

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

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

    # freebsd-update fetch
    # freebsd-update install
    # shutdown -r +10min "Rebooting for a security update"

    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-20:05/if_oce_ioctl.patch
    # fetch https://security.FreeBSD.org/patches/SA-20:05/if_oce_ioctl.patch.asc
    # gpg --verify if_oce_ioctl.patch.asc

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

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

    c) Recompile your kernel as described in <URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the
    system.

    VI. Correction details

    The following list contains the correction revision numbers for each
    affected branch.

    Branch/path Revision
    - ------------------------------------------------------------------------- stable/12/ r356089 releng/12.1/ r359139 stable/11/ r356090 releng/11.3/ r359139
    - -------------------------------------------------------------------------

    To see which files were modified by a particular revision, run the
    following command, replacing NNNNNN with the revision number, on a
    machine with Subversion installed:

    # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base

    Or visit the following URL, replacing NNNNNN with the revision number:

    <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

    VII. References

    <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15876>

    The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-20:05.if_oce_ioctl.asc> -----BEGIN PGP SIGNATURE-----

    iQKTBAEBCgB9FiEE/A6HiuWv54gCjWNV05eS9J6n5cIFAl5zplhfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEZD MEU4NzhBRTVBRkU3ODgwMjhENjM1NUQzOTc5MkY0OUVBN0U1QzIACgkQ05eS9J6n 5cJAuBAAnsnjdm2aTLo14rOiNHTNh0NqJPQTJ5F6MwE1P/nUlP5xM21GzDkyki7H 4AytZiCma6MCPzbc8aO6wGnc5zfSA1G/5TLetIgIQeyDQ8wRd0uhIoeO3NB3EXhz KJkNqtyosmzKUSmq7V/WqYN7VOVceegvbvLXCMTYFkUmvJxYbB67s0upqydFBAD4 j1ecKkNOIehV6cGColM3Dv7sJtVgdvaKg2ehW+AWR7UBOntIr/X3mVpkUE5Y2oLX tpjuEbdraOpIw/ohKfvpZNPXnEFmhgxrRV4WRw8yFeMsEtLI2HyyUV4ysZrgMKB+ LKxdhfd7HhIiGdoRZO4P60traRiRD+VfqU9Jt3xd9fO1t0MZYTS0R0Lqt9n3UPhR 26YcyrJgElaHIz8Viiw1U7Pdxila7b7gL+V4QVNSG00OqCKkdepgURRepzaz8Zhd lrfLf+9vysPIL6RsJwDb77qYbu9kK/afGmadBVot6QGg6ovWVLUGd0pQFJuLihZl YRocdxDO0lgF+w6llmp6ZidEjaScL7XG3yKG1DuoSa0tS+0eQU2U2hByJDzzzkTn x7t7WU8o5gSRYDe68yuJHXiHWswA4IK+tkYf+h8fDhENDbt7PCo86Vq0Dixg3hoG ak/KfomAAsnh6MfWNRlCWDXbe0p/yxYLPRHugDdrZ2IpX+uJWHs=
    =pADZ
    -----END PGP SIGNATURE-----
    _______________________________________________
    freebsd-announce@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-announce
    To unsubscribe, send any mail to "freebsd-announce-unsubscribe@freebsd.org"

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)