{"action":"Upgrade heimdal to 7.5.0+dfsg-1 or later.","affected":[{"fixed":"7.5.0+dfsg-1","introduced":"0"}],"component":"heimdal","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:12","exploited":false,"fixed_versions":["7.5.0+dfsg-1"],"id":"tcs_01M5NC95SY4106JJXJ708YB9J4","modified_at":"2026-09-01T20:03:45.473413638Z","published_at":"2017-12-06T15:29:00.250Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2017-17439","https://security-tracker.debian.org/tracker/CVE-2017-17439"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2017-17439","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2017-17439"}],"summary":"In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditional"}