• [gentoo-announce] [ GLSA 202008-23 ] chrony: Symlink vulnerability

    From Sam James@21:1/5 to All on Sun Aug 30 23:20:01 2020
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    Gentoo Linux Security Advisory GLSA 202008-23
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    https://security.gentoo.org/
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    Severity: Normal
    Title: chrony: Symlink vulnerability
    Date: August 30, 2020
    Bugs: #738154
    ID: 202008-23

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    Synopsis
    ========

    A vulnerability in chrony may allow a privileged attacker to cause data
    loss via a symlink.

    Background
    ==========

    chrony is a versatile implementation of the Network Time Protocol
    (NTP).

    Affected packages
    =================

    -------------------------------------------------------------------
    Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
    1 net-misc/chrony < 3.5.1 >= 3.5.1

    Description
    ===========

    It was found that chrony did not check whether its PID file was a
    symlink.

    Impact
    ======

    A local attacker could perform symlink attack(s) to overwrite arbitrary
    files with root privileges.

    Workaround
    ==========

    There is no known workaround at this time.

    Resolution
    ==========

    All chrony users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/chrony-3.5.1"

    References
    ==========

    [ 1 ] CVE-2020-14367
    https://nvd.nist.gov/vuln/detail/CVE-2020-14367
    [ 2 ] chrony-3.5.1 release announcement
    https://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2020/08/msg00000.html

    Availability
    ============

    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:

    https://security.gentoo.org/glsa/202008-23

    Concerns?
    =========

    Security is a primary focus of Gentoo Linux and ensuring the
    confidentiality and security of our users' machines is of utmost
    importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

    License
    =======

    Copyright 2020 Gentoo Foundation, Inc; referenced text
    belongs to its owner(s).

    The contents of this document are licensed under the
    Creative Commons - Attribution / Share Alike license.

    https://creativecommons.org/licenses/by-sa/2.5


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