{"schemaVersion":3,"id":"USN-6642-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"bind9 vulnerabilities\n\nShoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered\nthat Bind incorrectly handled parsing large DNS messages. A remote attacker\ncould possibly use this issue to cause Bind to consume resources, leading\nto a denial of service. (CVE-2023-4408)\n\nElias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered\nthat Bind icorrectly handled validating DNSSEC messages. A remote attacker\ncould possibly use this issue to cause Bind to consume resources, leading\nto a denial of service. (CVE-2023-50387)\n\nIt was discovered that Bind incorrectly handled preparing an NSEC3 closest\nencloser proof. A remote attacker could possibly use this issue to cause\nBind to consume resources, leading to a denial of service. (CVE-2023-50868)\n\nIt was discovered that Bind incorrectly handled reverse zone queries when\nnxdomain-redirect is enabled. A remote attacker could possibly use this\nissue to cause Bind to crash, leading to a denial of service.\n(CVE-2023-5517)\n\nIt was discovered that Bind incorrectly handled certain specific recursive\nquery patterns. A remote attacker could possibly use this issue to cause\nBind to consume memory, leading to a denial of service. (CVE-2023-6516)\n\nBind has been updated to 9.6.48. In addition to security fixes, the updated\npackages contain bug fixes, new features, and possibly incompatible\nchanges.\n\nPlease see the following for more information:\nhttps://downloads.isc.org/isc/bind9/9.16.48/doc/arm/html/notes.html","dates":{"published":"2024-02-19T14:00:14.000Z","modified":"2026-04-27T17:17:24.433Z","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":"< 1:9.16.48-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:9.16.48-0ubuntu0.20.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-6642-1","label":"ubuntu.com/security/notices/USN-6642-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-4408","label":"ubuntu.com/security/CVE-2023-4408","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-5517","label":"ubuntu.com/security/CVE-2023-5517","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-6516","label":"ubuntu.com/security/CVE-2023-6516","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-50387","label":"ubuntu.com/security/CVE-2023-50387","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-50868","label":"ubuntu.com/security/CVE-2023-50868","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2023-4408","CVE-2023-50387","CVE-2023-50868","CVE-2023-5517","CVE-2023-6516"],"downstream":[],"duplicates":[],"related":["CVE-2023-4408","CVE-2023-50387","CVE-2023-50868","CVE-2023-5517","CVE-2023-6516"]},"timeline":[{"kind":"published","date":"2024-02-19T14:00:14.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T17:17:24.433Z","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":"2026-10-19T21:03:03.920Z","stale":false,"partial":false}}