Ubuntu 3934-1: PolicyKit vulnerability

    Date03 Apr 2019
    CategoryUbuntu
    2100
    Posted ByLinuxSecurity Advisories
    PolicyKit could allow unintended access.
    ==========================================================================
    Ubuntu Security Notice USN-3934-1
    April 03, 2019
    
    policykit-1 vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    PolicyKit could allow unintended access.
    
    Software Description:
    - policykit-1: framework for managing administrative policies and privileges
    
    Details:
    
    It was discovered that PolicyKit incorrectly relied on the fork() system
    call in the Linux kernel being atomic. A local attacker could possibly use
    this issue to gain access to services that have cached authorizations.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      libpolkit-backend-1-0           0.105-21ubuntu0.4
      policykit-1                     0.105-21ubuntu0.4
    
    Ubuntu 18.04 LTS:
      libpolkit-backend-1-0           0.105-20ubuntu0.18.04.5
      policykit-1                     0.105-20ubuntu0.18.04.5
    
    Ubuntu 16.04 LTS:
      libpolkit-backend-1-0           0.105-14.1ubuntu0.5
      policykit-1                     0.105-14.1ubuntu0.5
    
    Ubuntu 14.04 LTS:
      libpolkit-backend-1-0           0.105-4ubuntu3.14.04.6
      policykit-1                     0.105-4ubuntu3.14.04.6
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3934-1
      CVE-2019-6133
    
    Package Information:
      https://launchpad.net/ubuntu/+source/policykit-1/0.105-21ubuntu0.4
      https://launchpad.net/ubuntu/+source/policykit-1/0.105-20ubuntu0.18.04.5
      https://launchpad.net/ubuntu/+source/policykit-1/0.105-14.1ubuntu0.5
      https://launchpad.net/ubuntu/+source/policykit-1/0.105-4ubuntu3.14.04.6
    
    
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