{
  "cveId": "CVE-2018-5738",
  "url": "https://patchblox.com/security/cve/CVE-2018-5738",
  "summary": "CVE-2018-5738 is fixed in 16 products on 1 platform, first by bind9 1:9.11.3\u002Bdfsg-1ubuntu1.1, released June 11, 2018. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bind9: Change #4777 (introduced in October 2017) introduced an unforeseen issue in releases which were issued after that dat...",
  "description": "Change #4777 (introduced in October 2017) introduced an unforeseen issue in releases which were issued after that date, affecting which clients are permitted to make recursive queries to a BIND nameserver. The intended (and documented) behavior is that if an operator has not specified a value for the \u0022allow-recursion\u0022 setting, it SHOULD default to one of the following: none, if \u0022recursion no;\u0022 is set in named.conf; a value inherited from the \u0022allow-query-cache\u0022 or \u0022allow-query\u0022 settings IF \u0022recursion yes;\u0022 (the default for that setting) AND match lists are explicitly set for \u0022allow-query-cache\u0022 or \u0022allow-query\u0022 (see the BIND9 Administrative Reference Manual section 6.2 for more details); or the intended default of \u0022allow-recursion {localhost; localnets;};\u0022 if \u0022recursion yes;\u0022 is in effect and no values are explicitly set for \u0022allow-query-cache\u0022 or \u0022allow-query\u0022. However, because of the regression introduced by change #4777, it is possible when \u0022recursion yes;\u0022 is in effect and no match list values are provided for \u0022allow-query-cache\u0022 or \u0022allow-query\u0022 for the setting of \u0022allow-recursion\u0022 to inherit a setting of all hosts from the \u0022allow-query\u0022 setting default, improperly permitting recursion to all clients. Affects BIND 9.9.12, 9.10.7, 9.11.3, 9.12.0-\u0026gt;9.12.1-P2, the development release 9.13.0, and also releases 9.9.12-S1, 9.10.7-S1, 9.11.3-S1, and 9.11.3-S2 from BIND 9 Supported Preview Edition.",
  "published": "2018-06-11T17:00:00Z",
  "severity": "Medium",
  "epss": 0.1137,
  "epssPercentile": 0.96015,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bind9",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "bind9 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bind9-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bind9-host",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "bind9-host 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bind9-host-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bind9utils",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "bind9utils 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-bind9utils-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "dnsutils",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "dnsutils 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-dnsutils-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libbind9-160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libbind9-160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libbind9-160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libdns-export1100",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libdns-export1100 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libdns-export1100-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libdns1100",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libdns1100 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libdns1100-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libirs-export160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libirs-export160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libirs-export160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libirs160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libirs160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libirs160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libisc-export169",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libisc-export169 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libisc-export169-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libisc169",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libisc169 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libisc169-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libisccc-export160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libisccc-export160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libisccc-export160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libisccc160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libisccc160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libisccc160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libisccfg-export160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libisccfg-export160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libisccfg-export160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libisccfg160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "libisccfg160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libisccfg160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "liblwres160",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "fix": "liblwres160 1:9.11.3\u002Bdfsg-1ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-liblwres160-1-9.11.3-dfsg-1ubuntu1.1",
      "released": "2018-06-11T17:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}