Ubuntu 4053-1: GVfs vulnerabilities

    Date09 Jul 2019
    CategoryUbuntu
    2653
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in GVfs.
    ==========================================================================
    Ubuntu Security Notice USN-4053-1
    July 09, 2019
    
    gvfs vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.04
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in GVfs.
    
    Software Description:
    - gvfs: Userspace virtual filesystem
    
    Details:
    
    It was discovered that GVfs incorrectly handled the admin backend. Files
    created or moved by the admin backend could end up with the wrong ownership
    information, contrary to expectations. This issue only affected Ubuntu
    18.04 LTS, Ubuntu 18.10, and Ubuntu 19.04. (CVE-2019-12447, CVE-2019-12448,
    CVE-2019-12449)
    
    It was discovered that GVfs incorrectly handled authentication on its
    private D-Bus socket. A local attacker could possibly connect to this
    socket and issue D-Bus calls. (CVE-2019-12795)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.04:
      gvfs                            1.40.1-1ubuntu0.1
      gvfs-backends                   1.40.1-1ubuntu0.1
    
    Ubuntu 18.10:
      gvfs                            1.38.1-0ubuntu1.3.2
      gvfs-backends                   1.38.1-0ubuntu1.3.2
    
    Ubuntu 18.04 LTS:
      gvfs                            1.36.1-0ubuntu1.3.3
      gvfs-backends                   1.36.1-0ubuntu1.3.3
    
    Ubuntu 16.04 LTS:
      gvfs                            1.28.2-1ubuntu1~16.04.3
      gvfs-backends                   1.28.2-1ubuntu1~16.04.3
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/4053-1
      CVE-2019-12447, CVE-2019-12448, CVE-2019-12449, CVE-2019-12795
    
    Package Information:
      https://launchpad.net/ubuntu/+source/gvfs/1.40.1-1ubuntu0.1
      https://launchpad.net/ubuntu/+source/gvfs/1.38.1-0ubuntu1.3.2
      https://launchpad.net/ubuntu/+source/gvfs/1.36.1-0ubuntu1.3.3
      https://launchpad.net/ubuntu/+source/gvfs/1.28.2-1ubuntu1~16.04.3
    
    
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