{"schemaVersion":3,"id":"CVE-2022-30699","aliases":["ALPINE-CVE-2022-30699","UBUNTU-CVE-2022-30699","DEBIAN-CVE-2022-30699"],"status":"published","duplicateOf":null,"title":null,"description":"NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the \"ghost domain names\" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.","dates":{"published":"2022-08-01T14:13:58.392Z","modified":"2024-09-16T18:29:59.438Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.01155,"percentile":0.66544,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.10299999999999997,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.01052},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01155,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01155,"percentile":0.66544}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.01052,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.01122,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.01155,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.01155,"percentile":0.66544}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-613","name":"Insufficient Session Expiration","description":"According to WASC, \"Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization.\"","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/613.html"}],"affected":[{"vendor":"alpine","product":"unbound","name":"unbound","label":"unbound","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/unbound","purlType":"apk","versions":[{"text":"< 1.16.2-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.16.2-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"unbound","name":"unbound","label":"unbound","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/unbound","purlType":"deb","versions":[{"text":"< 1.16.2-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.16.2-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"unbound","name":"unbound","label":"unbound","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/unbound","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.6.7-1ubuntu2.5","noFixRecorded":false,"fixedIn":null},{"text":"< 1.9.4-2ubuntu1.3","noFixRecorded":false,"fixedIn":null},{"text":"< 1.13.1-1ubuntu5.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1.6.7-1ubuntu2.5 | < 1.9.4-2ubuntu1.3 | < 1.13.1-1ubuntu5.1","eol":null,"hubHref":null},{"vendor":"fedoraproject","product":"fedora","name":"fedora","label":"fedora","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"35","noFixRecorded":false,"fixedIn":null},{"text":"36","noFixRecorded":false,"fixedIn":null}],"versionsText":"35 | 36","eol":{"isEol":true,"eolDate":"2022-12-13T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"35","label":"35","eolFrom":"2022-12-13T00:00:00.000Z","isLts":false,"isMaintained":false,"latestVersion":null},"product":{"name":"fedora","label":"Fedora Linux","category":"os"}},"hubHref":"/vendor/fedoraproject/fedora"},{"vendor":"nlnet labs","product":"unbound","name":"Unbound","label":"unbound","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ unspecified, ≤ 1.16.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ unspecified, ≤ 1.16.1","eol":null,"hubHref":"/vendor/nlnet_labs/unbound"},{"vendor":"nlnetlabs","product":"unbound","name":"unbound","label":"unbound","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.16.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.16.2","eol":null,"hubHref":"/vendor/nlnetlabs/unbound"}],"affectedCount":6,"eol":{"hasEol":true,"count":1},"references":[{"url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt","label":"www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt","hostname":"www.nlnetlabs.nl","tags":["REPORT","Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5L3ZFWZZFPBIL654BG75RWXUMPFQJ5EC/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D35CX4SCZVNKZTWJXPDFTHWZHINMGEZD/","label":"lists.fedoraproject.org/archives/…","hostname":"lists.fedoraproject.org","tags":["Vendor Advisory"]},{"url":"https://security.gentoo.org/glsa/202212-02","label":"security.gentoo.org/glsa/202212-02","hostname":"security.gentoo.org","tags":["Vendor Advisory","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html","label":"lists.debian.org/debian-lts-announce/2023/03/msg00024.html","hostname":"lists.debian.org","tags":["Mailing List"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2022-30699","label":"security.alpinelinux.org/vuln/CVE-2022-30699","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2022-30699","label":"ubuntu.com/security/CVE-2022-30699","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-5569-1","label":"ubuntu.com/security/notices/USN-5569-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-30699","label":"www.cve.org/CVERecord?id=CVE-2022-30699","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2022-30699","label":"security-tracker.debian.org/tracker/CVE-2022-30699","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-30699","label":"nvd.nist.gov/vuln/detail/CVE-2022-30699","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["DLA-3371-1","MGASA-2022-0303","RHSA-2022:7622","RHSA-2022:8062","RHSA-2024:2045","SUSE-SU-2024:1923-1","SUSE-SU-2024:1991-1","SUSE-SU-2024:1991-2","USN-5569-1"],"duplicates":[],"related":["SUSE-SU-2024:1923-1","SUSE-SU-2024:1991-1","SUSE-SU-2024:1991-2","USN-5569-1"]},"timeline":[{"kind":"published","date":"2022-08-01T14:13:58.392Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-16T18:29:59.438Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T15:45:31.622Z","stale":false,"partial":false}}