{"id":"ALPINE-CVE-2019-19331","details":"knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU utilization. DNS replies with very many resource records might be processed very inefficiently, in extreme cases taking even several CPU seconds for each such uncached message. For example, a few thousand A records can be squashed into one DNS message (limit is 64kB).","modified":"2026-11-03T06:31:55.312529458Z","published":"2019-12-16T16:15:11.660Z","upstream":["CVE-2019-19331"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2019-19331"}],"affected":[{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}},{"package":{"name":"knot-resolver","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/knot-resolver?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.0-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-19331.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}