{"schemaVersion":3,"id":"USN-4468-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"bind9 vulnerabilities\n\nEmanuel Almeida discovered that Bind incorrectly handled certain TCP\npayloads. A remote attacker could possibly use this issue to cause Bind to\ncrash, resulting in a denial of service. This issue only affected Ubuntu\n20.04 LTS. (CVE-2020-8620)\n\nJoseph Gullo discovered that Bind incorrectly handled QNAME minimization\nwhen used in certain configurations. A remote attacker could possibly use\nthis issue to cause Bind to crash, resulting in a denial of service. This\nissue only affected Ubuntu 20.04 LTS. (CVE-2020-8621)\n\nDave Feldman, Jeff Warren, and Joel Cunningham discovered that Bind\nincorrectly handled certain truncated responses to a TSIG-signed request. A\nremote attacker could possibly use this issue to cause Bind to crash,\nresulting in a denial of service. (CVE-2020-8622)\n\nLyu Chiy discovered that Bind incorrectly handled certain queries. A remote\nattacker could possibly use this issue to cause Bind to crash, resulting in\na denial of service. (CVE-2020-8623)\n\nJoop Boonen discovered that Bind incorrectly handled certain subdomain\nupdate-policy rules. A remote attacker granted privileges to change certain\nparts of a zone could use this issue to change other contents of the zone,\ncontrary to expectations. This issue only affected Ubuntu 18.04 LTS and\nUbuntu 20.04 LTS. (CVE-2020-8624)","dates":{"published":"2020-08-21T11:29:29.000Z","modified":"2026-04-22T10:07:27.606Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"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":[],"affected":[{"vendor":"ubuntu","product":"bind9","name":"bind9","label":"bind9","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/bind9","purlType":"deb","versions":[{"text":"< 1:9.10.3.dfsg.P4-8ubuntu1.17","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.11.3+dfsg-1ubuntu1.13","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.16.1-0ubuntu2.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:9.10.3.dfsg.P4-8ubuntu1.17 | < 1:9.11.3+dfsg-1ubuntu1.13 | < 1:9.16.1-0ubuntu2.3","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4468-1","label":"ubuntu.com/security/notices/USN-4468-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-8620","label":"ubuntu.com/security/CVE-2020-8620","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-8621","label":"ubuntu.com/security/CVE-2020-8621","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-8622","label":"ubuntu.com/security/CVE-2020-8622","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-8623","label":"ubuntu.com/security/CVE-2020-8623","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-8624","label":"ubuntu.com/security/CVE-2020-8624","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2020-8620","CVE-2020-8621","CVE-2020-8622","CVE-2020-8623","CVE-2020-8624"],"downstream":[],"duplicates":[],"related":["CVE-2020-8620","CVE-2020-8621","CVE-2020-8622","CVE-2020-8623","CVE-2020-8624"]},"timeline":[{"kind":"published","date":"2020-08-21T11:29:29.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:07:27.606Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T06:52:19.984Z","stale":false,"partial":false}}