Ubuntu 3270-1: NSS vulnerabilities

    Date27 Apr 2017
    CategoryUbuntu
    53
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in NSS.
    ==========================================================================
    Ubuntu Security Notice USN-3270-1
    April 27, 2017
    
    nss vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 17.04
    - Ubuntu 16.10
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in NSS.
    
    Software Description:
    - nss: Network Security Service library
    
    Details:
    
    Karthik Bhargavan and Gaetan Leurent discovered that the DES and Triple DES
    ciphers were vulnerable to birthday attacks. A remote attacker could
    possibly use this flaw to obtain clear text data from long encrypted
    sessions. This update causes NSS to limit use of the same symmetric key.
    (CVE-2016-2183)
    
    It was discovered that NSS incorrectly handled Base64 decoding. A remote
    attacker could use this flaw to cause NSS to crash, resulting in a denial
    of service, or possibly execute arbitrary code. (CVE-2017-5461)
    
    This update refreshes the NSS package to version 3.28.4 which includes
    the latest CA certificate bundle.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 17.04:
      libnss3                         2:3.28.4-0ubuntu0.17.04.1
    
    Ubuntu 16.10:
      libnss3                         2:3.28.4-0ubuntu0.16.10.1
    
    Ubuntu 16.04 LTS:
      libnss3                         2:3.28.4-0ubuntu0.16.04.1
    
    Ubuntu 14.04 LTS:
      libnss3                         2:3.28.4-0ubuntu0.14.04.1
    
    This update uses a new upstream release, which includes additional bug
    fixes. After a standard system update you need to restart any applications
    that use NSS, such as Evolution and Chromium, to make all the necessary
    changes.
    
    References:
      http://www.ubuntu.com/usn/usn-3270-1
      CVE-2016-2183, CVE-2017-5461
    
    Package Information:
      https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.17.04.1
      https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.10.1
      https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.1
      https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.14.04.1
    
    
    
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