Ubuntu 3235-1: libxml2 vulnerabilities

    Date16 Mar 2017
    CategoryUbuntu
    37
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in libxml2.
    ==========================================================================
    Ubuntu Security Notice USN-3235-1
    March 16, 2017
    
    libxml2 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 libxml2.
    
    Software Description:
    - libxml2: GNOME XML library
    
    Details:
    
    It was discovered that libxml2 incorrectly handled format strings. If a
    user or automated system were tricked into opening a specially crafted
    document, an attacker could possibly cause libxml2 to crash, resulting in a
    denial of service. This issue only affected Ubuntu 12.04 LTS, Ubuntu 14.04
    LTS, and Ubuntu 16.04 LTS. (CVE-2016-4448)
    
    It was discovered that libxml2 incorrectly handled certain malformed
    documents. If a user or automated system were tricked into opening a
    specially crafted document, an attacker could cause libxml2 to crash,
    resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2016-4658)
    
    Nick Wellnhofer discovered that libxml2 incorrectly handled certain
    malformed documents. If a user or automated system were tricked into
    opening a specially crafted document, an attacker could cause libxml2 to
    crash, resulting in a denial of service, or possibly execute arbitrary
    code. (CVE-2016-5131)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.10:
      libxml2                         2.9.4+dfsg1-2ubuntu0.1
    
    Ubuntu 16.04 LTS:
      libxml2                         2.9.3+dfsg1-1ubuntu0.2
    
    Ubuntu 14.04 LTS:
      libxml2                         2.9.1+dfsg1-3ubuntu4.9
    
    Ubuntu 12.04 LTS:
      libxml2                         2.7.8.dfsg-5.1ubuntu4.17
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-3235-1
      CVE-2016-4448, CVE-2016-4658, CVE-2016-5131
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libxml2/2.9.4+dfsg1-2ubuntu0.1
      https://launchpad.net/ubuntu/+source/libxml2/2.9.3+dfsg1-1ubuntu0.2
      https://launchpad.net/ubuntu/+source/libxml2/2.9.1+dfsg1-3ubuntu4.9
      https://launchpad.net/ubuntu/+source/libxml2/2.7.8.dfsg-5.1ubuntu4.17
    
    
    
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