Ubuntu 3171-1: LibVNCServer vulnerabilities

    Date11 Jan 2017
    58
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in LibVNCServer.
    ==========================================================================
    Ubuntu Security Notice USN-3171-1
    January 11, 2017
    
    libvncserver vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.10
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in LibVNCServer.
    
    Software Description:
    - libvncserver: vnc server library
    
    Details:
    
    Josef Gajdusek discovered that the LibVNCServer client library incorrectly
    handled certain FrameBufferUpdate messages.  If a user were tricked into
    connecting to a malicious server, an attacker could use this issue to cause
    a denial of service, or possibly execute arbitrary code. (CVE-2016-9941,
    CVE-2016-9942)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.10:
      libvncclient1                   0.9.10+dfsg-3ubuntu0.16.10.1
      libvncserver1                   0.9.10+dfsg-3ubuntu0.16.10.1
    
    Ubuntu 16.04 LTS:
      libvncclient1                   0.9.10+dfsg-3ubuntu0.16.04.1
      libvncserver1                   0.9.10+dfsg-3ubuntu0.16.04.1
    
    Ubuntu 14.04 LTS:
      libvncserver0                   0.9.9+dfsg-1ubuntu1.2
    
    Ubuntu 12.04 LTS:
      libvncserver0                   0.9.8.2-2ubuntu1.2
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://www.ubuntu.com/usn/usn-3171-1
      CVE-2016-9941, CVE-2016-9942
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.10.1
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.10+dfsg-3ubuntu0.16.04.1
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.9+dfsg-1ubuntu1.2
      https://launchpad.net/ubuntu/+source/libvncserver/0.9.8.2-2ubuntu1.2
    
    
    

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