{"action":"Upgrade nsd to 4.2.4-1 or later.","affected":[{"fixed":"4.2.4-1","introduced":"0"}],"component":"nsd","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["4.2.4-1"],"id":"tcs_01M5NDSBM4SAGGDMZ04V9BV9CV","modified_at":"2026-09-21T07:00:57.865334613Z","published_at":"2019-07-03T20:15:11.823Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2019-13207","https://security-tracker.debian.org/tracker/CVE-2019-13207"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2019-13207","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2019-13207"}],"summary":"nsd-checkzone in NLnet Labs NSD 4.2.0 has a Stack-based Buffer Overflow in the dname_concatenate() function in dname.c."}