{
  "threat_severity" : "Moderate",
  "public_date" : "2023-01-25T00:00:00Z",
  "bugzilla" : {
    "description" : "bind: sending specific queries to the resolver may cause a DoS",
    "id" : "2164038",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2164038"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-20",
  "details" : [ "BIND 9 resolver can crash when stale cache and stale answers are enabled, option `stale-answer-client-timeout` is set to a positive integer, and the resolver receives an RRSIG query.\nThis issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.", "A flaw was found in Bind, where a resolver crash is possible. When stale cache and stale answers are enabled, the option stale-answer-client-timeout is set to a positive integer, and the resolver receives an RRSIG query." ],
  "statement" : "The flaw exists in the implementation of the stale-answer-client-timeout option, which was first effectively introduced in bind 9.16.12.",
  "acknowledgement" : "Red Hat would like to thank Borja Marcos (Sarenet) and Iratxe Niño (Fundación Sarenet) for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2023-05-16T00:00:00Z",
    "advisory" : "RHSA-2023:2792",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8",
    "package" : "bind9.16-32:9.16.23-0.14.el8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2023-05-09T00:00:00Z",
    "advisory" : "RHSA-2023:2261",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "bind-32:9.16.23-11.el9"
  } ],
  "package_state" : [ {
    "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"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "dhcp",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-3736\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-3736\nhttps://kb.isc.org/docs/cve-2022-3736" ],
  "name" : "CVE-2022-3736",
  "mitigation" : {
    "value" : "Setting stale-answer-client-timeout to 0 or to off/disabled will prevent BIND from crashing due to this issue.",
    "lang" : "en:us"
  },
  "csaw" : false
}