Ubuntu 3892-1: GDM vulnerability

    Date20 Feb 2019
    2914
    Posted ByLinuxSecurity Advisories
    GDM could give unauthorized access to a different user.
    ==========================================================================
    Ubuntu Security Notice USN-3892-1
    February 20, 2019
    
    gdm3 vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    
    Summary:
    
    GDM could give unauthorized access to a different user.
    
    Software Description:
    - gdm3: GNOME Display Manager
    
    Details:
    
    Burghard Britzke discovered that GDM incorrectly handled certain
    configurations. An attacker could possibly use this issue to get
    unauthorized access to a different user.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      gdm3                            3.30.1-1ubuntu5.1
    
    Ubuntu 18.04 LTS:
      gdm3                            3.28.3-0ubuntu18.04.4
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3892-1
      CVE-2019-3825
    
    Package Information:
      https://launchpad.net/ubuntu/+source/gdm3/3.30.1-1ubuntu5.1
      https://launchpad.net/ubuntu/+source/gdm3/3.28.3-0ubuntu18.04.4
    
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