Ubuntu 3877-1: LibVNCServer vulnerabilities

    Date31 Jan 2019
    CategoryUbuntu
    5050
    Posted ByAnthony Pell
    Several security issues were fixed in LibVNCServer.
    ==========================================================================
    Ubuntu Security Notice USN-3877-1
    January 31, 2019
    
    libvncserver vulnerabilities
    ==========================================================================
    
    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:
    
    Several security issues were fixed in LibVNCServer.
    
    Software Description:
    - libvncserver: vnc server library
    
    Details:
    
    It was discovered that LibVNCServer incorrectly handled certain operations.
    A remote attacker able to connect to applications using LibVNCServer could
    possibly use this issue to obtain sensitive information, cause a denial of
    service, or execute arbitrary code.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      libvncclient1                   0.9.11+dfsg-1.1ubuntu0.1
      libvncserver1                   0.9.11+dfsg-1.1ubuntu0.1
    
    Ubuntu 18.04 LTS:
      libvncclient1                   0.9.11+dfsg-1ubuntu1.1
      libvncserver1                   0.9.11+dfsg-1ubuntu1.1
    
    Ubuntu 16.04 LTS:
      libvncclient1                   0.9.10+dfsg-3ubuntu0.16.04.3
      libvncserver1                   0.9.10+dfsg-3ubuntu0.16.04.3
    
    Ubuntu 14.04 LTS:
      libvncserver0                   0.9.9+dfsg-1ubuntu1.4
    
    After a standard system update you need to restart LibVNCServer
    applications to make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3877-1
      CVE-2018-15126, CVE-2018-15127, CVE-2018-20019, CVE-2018-20020,
      CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024,
      CVE-2018-20748, CVE-2018-20749, CVE-2018-20750, CVE-2018-6307
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.11+dfsg-1.1ubuntu0.1
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.11+dfsg-1ubuntu1.1
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.3
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.4
    
    
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