Ubuntu 4015-2: DBus vulnerability

    Date12 Jun 2019
    CategoryUbuntu
    28
    Posted ByLinuxSecurity Advisories
    DBus could allow unintended access to services.
    ==========================================================================
    Ubuntu Security Notice USN-4015-2
    June 12, 2019
    
    dbus vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    - Ubuntu 12.04 ESM
    
    Summary:
    
    DBus could allow unintended access to services.
    
    Software Description:
    - dbus: simple interprocess messaging system
    
    Details:
    
    USN-4015-1 fixed a vulnerability in DBus. This update provides
    the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
    
    Original advisory details:
    
     Joe Vennix discovered that DBus incorrectly handled DBUS_COOKIE_SHA1
     authentication. A local attacker could possibly use this issue to bypass
     authentication and connect to DBus servers with elevated privileges.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      dbus                            1.6.18-0ubuntu4.5+esm1
      libdbus-1-3                     1.6.18-0ubuntu4.5+esm1
    
    Ubuntu 12.04 ESM:
      dbus                            1.4.18-1ubuntu1.9
      libdbus-1-3                     1.4.18-1ubuntu1.9
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4015-2
      https://usn.ubuntu.com/4015-1
      CVE-2019-12749
    
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