Ubuntu 3504-1: libxml2 vulnerability

    Date05 Dec 2017
    CategoryUbuntu
    333
    Posted ByLinuxSecurity Advisories
    libxml2 could be made to crash if it opened a specially craftedfile.
    ==========================================================================
    Ubuntu Security Notice USN-3504-1
    December 05, 2017
    
    libxml2 vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 17.10
    - Ubuntu 17.04
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    libxml2 could be made to crash if it opened a specially crafted
    file.
    
    Software Description:
    - libxml2: GNOME XML library
    
    Details:
    
    Wei Lei discovered that libxml2 incorrecty handled certain parameter
    entities. An attacker could use this issue with specially constructed
    XML data to cause libxml2 to consume resources, leading to a denial of
    service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 17.10:
      libxml2                         2.9.4+dfsg1-4ubuntu1.1
      libxml2-utils                   2.9.4+dfsg1-4ubuntu1.1
      python-libxml2                  2.9.4+dfsg1-4ubuntu1.1
      python3-libxml2                 2.9.4+dfsg1-4ubuntu1.1
    
    Ubuntu 17.04:
      libxml2                         2.9.4+dfsg1-2.2ubuntu0.2
      libxml2-utils                   2.9.4+dfsg1-2.2ubuntu0.2
      python-libxml2                  2.9.4+dfsg1-2.2ubuntu0.2
      python3-libxml2                 2.9.4+dfsg1-2.2ubuntu0.2
    
    Ubuntu 16.04 LTS:
      libxml2                         2.9.3+dfsg1-1ubuntu0.4
      libxml2-utils                   2.9.3+dfsg1-1ubuntu0.4
      python-libxml2                  2.9.3+dfsg1-1ubuntu0.4
    
    Ubuntu 14.04 LTS:
      libxml2                         2.9.1+dfsg1-3ubuntu4.11
      libxml2-utils                   2.9.1+dfsg1-3ubuntu4.11
      python-libxml2                  2.9.1+dfsg1-3ubuntu4.11
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://www.ubuntu.com/usn/usn-3504-1
      CVE-2017-16932
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-4ubuntu1.1
      https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-2.2ubuntu0.2
      https://launchpad.net/ubuntu/+source/libxml2/2.9.3+dfsg1-1ubuntu0.4
      https://launchpad.net/ubuntu/+source/libxml2/2.9.1+dfsg1-3ubuntu4.11
    
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