Ubuntu 2865-1: GnuTLS vulnerability

    Date08 Jan 2016
    CategoryUbuntu
    45
    Posted ByLinuxSecurity Advisories
    GnuTLS could be made to expose sensitive information over the network.
    ==========================================================================
    Ubuntu Security Notice USN-2865-1
    January 08, 2016
    
    gnutls26, gnutls28 vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.04
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    GnuTLS could be made to expose sensitive information over the network.
    
    Software Description:
    - gnutls28: GNU TLS library
    - gnutls26: GNU TLS library
    
    Details:
    
    Karthikeyan Bhargavan and Gaetan Leurent discovered that GnuTLS incorrectly
    allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were
    able to perform a man-in-the-middle attack, this flaw could be exploited to
    view sensitive information.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.04:
      libgnutls-deb0-28               3.3.8-3ubuntu3.2
      libgnutls-openssl27             3.3.8-3ubuntu3.2
      libgnutlsxx28                   3.3.8-3ubuntu3.2
    
    Ubuntu 14.04 LTS:
      libgnutls-openssl27             2.12.23-12ubuntu2.4
      libgnutls26                     2.12.23-12ubuntu2.4
      libgnutlsxx27                   2.12.23-12ubuntu2.4
    
    Ubuntu 12.04 LTS:
      libgnutls-openssl27             2.12.14-5ubuntu3.11
      libgnutls26                     2.12.14-5ubuntu3.11
      libgnutlsxx27                   2.12.14-5ubuntu3.11
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-2865-1
      CVE-2015-7575
    
    Package Information:
      https://launchpad.net/ubuntu/+source/gnutls28/3.3.8-3ubuntu3.2
      https://launchpad.net/ubuntu/+source/gnutls26/2.12.23-12ubuntu2.4
      https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu3.11
    
    
    
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