Ubuntu 4120-1: systemd vulnerability

    Date03 Sep 2019
    CategoryUbuntu
    1457
    Posted ByLinuxSecurity Advisories
    systemd-resolved would allow unprivileged users to change DNS settings.
    ==========================================================================
    Ubuntu Security Notice USN-4120-1
    September 03, 2019
    
    systemd vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.04
    - Ubuntu 18.04 LTS
    
    Summary:
    
    systemd-resolved would allow unprivileged users to change DNS settings.
    
    Software Description:
    - systemd: system and service manager
    
    Details:
    
    It was discovered that the systemd-resolved D-Bus interface did not
    enforce appropriate access controls. A local unprivileged user could
    exploit this to modify a system's DNS resolver settings.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.04:
      systemd                         240-6ubuntu5.6
    
    Ubuntu 18.04 LTS:
      systemd                         237-3ubuntu10.28
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4120-1
      CVE-2019-15718
    
    Package Information:
      https://launchpad.net/ubuntu/+source/systemd/240-6ubuntu5.6
      https://launchpad.net/ubuntu/+source/systemd/237-3ubuntu10.28
    
    
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