{
  "threat_severity" : "Moderate",
  "public_date" : "2019-04-24T00:00:00Z",
  "bugzilla" : {
    "description" : "bind: flaw in nxredirect can cause assertion failure",
    "id" : "1702545",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1702545"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.9",
    "cvss3_scoring_vector" : "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "draft"
  },
  "details" : [ "A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally. The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible. Versions affected: BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch.", "A flaw was found in the way \"nxdomain-redirect\" feature was implemented in bind. An attacker could use this flaw on a server with a vulnerable configuration to cause bind to exit, denying service to other clients." ],
  "statement" : "The most common bind configuration which is affected by this flaw is, if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible.",
  "acknowledgement" : "Red Hat would like to thank ISC for reporting this issue.",
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "bind",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 5",
    "fix_state" : "Not affected",
    "package_name" : "bind97",
    "cpe" : "cpe:/o:redhat:enterprise_linux:5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "bind",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "bind",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "bind",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2019-6467\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-6467\nhttps://kb.isc.org/docs/cve-2019-6467" ],
  "name" : "CVE-2019-6467",
  "mitigation" : {
    "value" : "Exploitation of this defect can be effectively prevented by disabling the nxdomain-redirect feature in the nameserver's configuration.",
    "lang" : "en:us"
  },
  "csaw" : false
}