Ubuntu 3758-1: libx11 vulnerabilities

    Date30 Aug 2018
    CategoryUbuntu
    2671
    Posted ByAnthony Pell
    Several security issues were fixed in libx11.
    ==========================================================================
    Ubuntu Security Notice USN-3758-1
    August 30, 2018
    
    libx11 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in libx11.
    
    Software Description:
    - libx11: X11 client-side library
    
    Details:
    
    Tobias Stoeckmann discovered that libx11 incorrectly handled certain
    images. An attacker could possibly use this issue to access sensitive
    information (CVE-2016-7942)
    
    Tobias Stoeckmann discovered that libx11 incorrectly handled certain
    inputs. An attacker could possibly use this issue to access sensitive
    information. (CVE-2016-7943)
    
    It was discovered that libx11 incorrectly handled certain inputs.
    An attacker could possibly use this issue to cause a denial of service.
    (CVE-2018-14598, CVE-2018-14599, CVE-2018-14600)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      libx11-6                        2:1.6.4-3ubuntu0.1
      libx11-dev                      2:1.6.4-3ubuntu0.1
    
    Ubuntu 16.04 LTS:
      libx11-6                        2:1.6.3-1ubuntu2.1
      libx11-dev                      2:1.6.3-1ubuntu2.1
    
    Ubuntu 14.04 LTS:
      libx11-6                        2:1.6.2-1ubuntu2.1
      libx11-dev                      2:1.6.2-1ubuntu2.1
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3758-1
      CVE-2016-7942, CVE-2016-7943, CVE-2018-14598, CVE-2018-14599,
      CVE-2018-14600
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libx11/2:1.6.4-3ubuntu0.1
      https://launchpad.net/ubuntu/+source/libx11/2:1.6.3-1ubuntu2.1
      https://launchpad.net/ubuntu/+source/libx11/2:1.6.2-1ubuntu2.1
    
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