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  • [FreeBSD-Announce] FreeBSD Errata Notice FreeBSD-EN-21:08.freebsd-updat

    From FreeBSD Errata Notices@21:1/5 to All on Wed Feb 24 07:00:02 2021
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    ============================================================================= FreeBSD-EN-21:08.freebsd-update Errata Notice
    The FreeBSD Project

    Topic: freebsd-update passwd regeneration

    Category: core
    Module: freebsd-update
    Announced: 2021-02-24
    Affects: All supported versions of FreeBSD.
    Corrected: 2020-12-27 20:50:53 UTC (stable/12, 12.2-STABLE)
    2021-02-24 01:43:52 UTC (releng/12.2, 12.2-RELEASE-p4)
    2020-12-27 20:52:37 UTC (stable/11, 11.4-STABLE)
    2021-02-24 01:41:49 UTC (releng/11.4, 11.4-RELEASE-p8)

    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

    freebsd-update provides binary updates for supported releases of FreeBSD on amd64 and i386.

    II. Problem Description

    The existing logic to try and avoid regenerating passwd/login.conf files
    relies on timestamp comparisons between old and new files, with the caveat
    that it's comparing the installed with a timestamp that has been clobbered to do the comparison.

    III. Impact

    User and login.conf changes coming in from a binary update may not properly regenerate the databases for the changes to take effect.

    IV. Workaround

    To workaround this issue, one may regenerate databases manually with pwd_mkdb(8) and cap_mkdb(1), e.g.,

    pwd_mkdb -p /etc/master.passwd
    cap_mkdb /etc/login.conf

    V. Solution

    Upgrade your system to a supported FreeBSD stable or release / security
    branch (releng) dated after the correction date. No reboot is required.

    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-21:08/freebsd-update.patch
    # fetch https://security.FreeBSD.org/patches/EN-21:08/freebsd-update.patch.asc # gpg --verify freebsd-update.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/ r368873 releng/12.2/ r369356 stable/11/ r368824 releng/11.4/ r369349
    - -------------------------------------------------------------------------

    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

    The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-EN-21:08.freebsd-update.asc>
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