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    Ubuntu 2982-1: Libksba vulnerabilities

    Date
    104
    Posted By
    Libksba could be made to crash or run programs if it decoded specially crafted data.
    ==========================================================================
    Ubuntu Security Notice USN-2982-1
    May 17, 2016
    
    libksba vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.04 LTS
    - Ubuntu 15.10
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Libksba could be made to crash or run programs if it decoded specially
    crafted data.
    
    Software Description:
    - libksba: X.509 and CMS support library
    
    Details:
    
    Hanno Böck discovered that Libksba incorrectly handled decoding certain BER
    data. An attacker could use this issue to cause Libksba to crash, resulting
    in a denial of service. This issue only applied to Ubuntu 12.04 LTS and
    Ubuntu 14.04 LTS. (CVE-2016-4353)
    
    Hanno Böck discovered that Libksba incorrectly handled decoding certain BER
    data. An attacker could use this issue to cause Libksba to crash, resulting
    in a denial of service, or possibly execute arbitrary code. This issue only
    applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2016-4354,
    CVE-2016-4355)
    
    Hanno Böck discovered that Libksba incorrectly handled incorrect utf-8
    strings when decoding certain DN data. An attacker could use this issue to
    cause Libksba to crash, resulting in a denial of service, or possibly
    execute arbitrary code. This issue only applied to Ubuntu 12.04 LTS and
    Ubuntu 14.04 LTS. (CVE-2016-4356)
    
    Pascal Cuoq discovered that Libksba incorrectly handled incorrect utf-8
    strings when decoding certain DN data. An attacker could use this issue to
    cause Libksba to crash, resulting in a denial of service, or possibly
    execute arbitrary code. (CVE-2016-4574)
    
    Pascal Cuoq discovered that Libksba incorrectly handled decoding certain
    data. An attacker could use this issue to cause Libksba to crash, resulting
    in a denial of service. (CVE-2016-4579)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      libksba8                        1.3.3-1ubuntu0.16.04.1
    
    Ubuntu 15.10:
      libksba8                        1.3.3-1ubuntu0.15.10.1
    
    Ubuntu 14.04 LTS:
      libksba8                        1.3.0-3ubuntu0.14.04.2
    
    Ubuntu 12.04 LTS:
      libksba8                        1.2.0-2ubuntu0.2
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://www.ubuntu.com/usn/usn-2982-1
      CVE-2016-4353, CVE-2016-4354, CVE-2016-4355, CVE-2016-4356,
      CVE-2016-4574, CVE-2016-4579
    
    Package Information:
      https://launchpad.net/ubuntu/+source/libksba/1.3.3-1ubuntu0.16.04.1
      https://launchpad.net/ubuntu/+source/libksba/1.3.3-1ubuntu0.15.10.1
      https://launchpad.net/ubuntu/+source/libksba/1.3.0-3ubuntu0.14.04.2
      https://launchpad.net/ubuntu/+source/libksba/1.2.0-2ubuntu0.2
    
    
    

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