Ubuntu 3893-1: Bind vulnerabilities

    Date22 Feb 2019
    CategoryUbuntu
    2098
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in Bind.
    ==========================================================================
    Ubuntu Security Notice USN-3893-1
    February 22, 2019
    
    bind9 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.10
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in Bind.
    
    Software Description:
    - bind9: Internet Domain Name Server
    
    Details:
    
    Toshifumi Sakaguchi discovered that Bind incorrectly handled memory. A
    remote attacker could possibly use this issue to cause Bind to consume
    resources, leading to a denial of service. This issue only affected Ubuntu
    18.04 LTS and Ubuntu 18.10. (CVE-2018-5744)
    
    It was discovered that Bind incorrectly handled certain trust anchors when
    used with the "managed-keys" feature. A remote attacker could possibly use
    this issue to cause Bind to crash, resulting in a denial of service.
    (CVE-2018-5745)
    
    It was discovered that Bind incorrectly handled certain controls for zone
    transfers, contrary to expectations. (CVE-2019-6465)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      bind9                           1:9.11.4+dfsg-3ubuntu5.1
    
    Ubuntu 18.04 LTS:
      bind9                           1:9.11.3+dfsg-1ubuntu1.5
    
    Ubuntu 16.04 LTS:
      bind9                           1:9.10.3.dfsg.P4-8ubuntu1.12
    
    Ubuntu 14.04 LTS:
      bind9                           1:9.9.5.dfsg-3ubuntu0.19
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      https://usn.ubuntu.com/usn/usn-3893-1
      CVE-2018-5744, CVE-2018-5745, CVE-2019-6465
    
    Package Information:
      https://launchpad.net/ubuntu/+source/bind9/1:9.11.4+dfsg-3ubuntu5.1
      https://launchpad.net/ubuntu/+source/bind9/1:9.11.3+dfsg-1ubuntu1.5
      https://launchpad.net/ubuntu/+source/bind9/1:9.10.3.dfsg.P4-8ubuntu1.12
      https://launchpad.net/ubuntu/+source/bind9/1:9.9.5.dfsg-3ubuntu0.19
    
    
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