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  • [FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-20:21.ipfw

    From FreeBSD Errata Notices@21:1/5 to All on Tue Dec 1 21:00:01 2020
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    ============================================================================= FreeBSD-EN-20:21.ipfw Errata Notice
    The FreeBSD Project

    Topic: Uninitialized variable in ipfw

    Category: core
    Module: ipfw
    Announced: 2020-12-01
    Affects: FreeBSD 12.2
    Corrected: 2020-10-18 20:54:15 UTC (stable/12, 12.2-STABLE)
    2020-12-01 19:36:36 UTC (releng/12.2, 12.2-RELEASE-p1)

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

    I. Background

    ipfw(8) is the command-line utility used to configure the ipfw(4) firewall.

    II. Problem Description

    A regression in FreeBSD 12.2 meant that ipfw(8) fwd commands referencing specific port numbers may configure the firewall incorrectly.

    III. Impact

    Forwarding rules referencing port numbers may not work as configured.

    IV. Workaround

    No workaround is available.

    V. Solution

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

    Perform one of the following:

    1) To update your 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

    2) To update your 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/EN-20:21/ipfw.patch
    # fetch https://security.FreeBSD.org/patches/EN-20:21/ipfw.patch.asc
    # gpg --verify ipfw.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>.

    VI. Correction details

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

    Branch/path Revision
    - ------------------------------------------------------------------------- stable/12/ r366816 releng/12.2/ r368252
    - -------------------------------------------------------------------------

    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://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250434>

    The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-20:21.ipfw.asc> -----BEGIN PGP SIGNATURE-----

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