{"id":"CVE-2018-10920","aliases":["DEBIAN-CVE-2018-10920","EUVD-2018-2974","GHSA-xv4h-w5rx-q9c8","UBUNTU-CVE-2018-10920"],"status":"published","title":"Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows...","description":"Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.03239,"percentile":0.88373,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-20"],"published":"2018-08-02T13:00:00Z","modified":"2026-10-24T10:30:33Z","exploits":[{"source":"pocgithub","id":"shutingrz/CVE-2018-10920_PoC","title":"shutingrz/CVE-2018-10920_PoC","date":"2019-01-25","url":"https://github.com/shutingrz/CVE-2018-10920_PoC"}],"fixes":[{"ecosystem":"Debian:12","package":"knot-resolver","fixed_in":["2.4.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"knot-resolver","fixed_in":["2.4.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"knot-resolver","fixed_in":["2.4.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.1-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0~beta2-123-g6134920-1","1.0.0~beta3-1","1.0.0~beta3-1ubuntu0.1~esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"knot-resolver","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.3-1","1.5.0-4","1.5.1-1","1.5.2-1","2.0.0-3","2.1.0-1","2.1.0-2","2.1.1-1","2.1.1-1ubuntu0.1~esm2"]}],"products":[{"vendor":"cz.nic","product":"knot-resolver"},{"vendor":"nic","product":"knot_resolver"}],"references":[{"url":"https://www.knot-resolver.cz/2018-08-02-knot-resolver-2.4.1.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10920","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-10920"},{"url":"https://github.com/advisories/GHSA-xv4h-w5rx-q9c8"},{"url":"https://security-tracker.debian.org/tracker/CVE-2018-10920","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-10920","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-10920","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2018-10920","description":"Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison 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cache.","status":"published","published":"2018-08-02T13:29:00.22Z","modified":"2026-06-17T01:34:55.507Z","cvss":[{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"secondary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:04:35.310988Z"}],"osv":[{"id":"CVE-2018-10920","description":"Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison 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cache.","status":"published","published":"2018-08-02T13:29:00Z","modified":"2026-04-22T11:41:20.42621Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"},{"version":"3.1","score":6.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:16.544091Z"}]}}