Gentoo: GLSA-201909-08: D-Bus: Authentication bypass

    Date08 Sep 2019
    CategoryGentoo
    560
    Posted ByLinuxSecurity Advisories
    Gentoo Large
    An authentication bypass was discovered in D-Bus.
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    Gentoo Linux Security Advisory                           GLSA 201909-08
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                                               https://security.gentoo.org/
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     Severity: Normal
        Title: D-Bus: Authentication bypass
         Date: September 08, 2019
         Bugs: #687900
           ID: 201909-08
    
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    Synopsis
    ========
    
    An authentication bypass was discovered in D-Bus.
    
    Background
    ==========
    
    D-Bus is a message bus system which processes can use to talk to each
    other.
    
    Affected packages
    =================
    
        -------------------------------------------------------------------
         Package              /     Vulnerable     /            Unaffected
        -------------------------------------------------------------------
      1  sys-apps/dbus               < 1.12.16                 >= 1.12.16
    
    Description
    ===========
    
    It was discovered that a local attacker could manipulate symbolic links
    in their own home directory to bypass authentication and connect to a
    DBusServer with elevated privileges.
    
    Impact
    ======
    
    A local attacker can bypass authentication mechanisms and elevate
    privileges.
    
    Workaround
    ==========
    
    There is no known workaround at this time.
    
    Resolution
    ==========
    
    All D-Bus users should upgrade to the latest version:
    
      # emerge --sync
      # emerge --ask --oneshot --verbose ">=sys-apps/dbus-1.12.16"
    
    References
    ==========
    
    [ 1 ] CVE-2019-12749
          https://nvd.nist.gov/vuln/detail/CVE-2019-12749
    
    Availability
    ============
    
    This GLSA and any updates to it are available for viewing at
    the Gentoo Security Website:
    
     https://security.gentoo.org/glsa/201909-08
    
    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 2019 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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