Ubuntu 3733-2: GnuPG vulnerability

    Date15 Aug 2018
    CategoryUbuntu
    2933
    Posted ByAnthony Pell
    GnuPG could be made to expose sensitive information.
    ==========================================================================
    Ubuntu Security Notice USN-3733-2
    August 15, 2018
    
    gnupg vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    GnuPG could be made to expose sensitive information.
    
    Software Description:
    - gnupg: GNU privacy guard - a free PGP replacement
    
    Details:
    
    USN-3733-1 fixed a vulnerability in GnuPG. This update provides
    the corresponding update for Ubuntu 12.04 ESM.
    
    Original advisory details:
    
     Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot
     Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal,
     and Yuval Yarom discovered that GnuPG is vulnerable to a cache side-
     channel attack. A local attacker could use this attack to recover RSA
     private keys.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      gnupg                           1.4.11-3ubuntu2.12
      gnupg-curl                      1.4.11-3ubuntu2.12
      gpgv                            1.4.11-3ubuntu2.12
    
    In general, a standard system update will make all the necessary
    changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3733-2
      https://usn.ubuntu.com/usn/usn-3733-1
      CVE-2017-7526
    
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