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    Gentoo: GLSA-202008-23: chrony: Symlink vulnerability

    Date
    179
    Posted By
    A vulnerability in chrony may allow a privileged attacker to cause data loss via a symlink.
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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
    This email address is being protected from spambots. You need JavaScript enabled to view it. 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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