{"action":"Upgrade heimdal to 7.4.0-r2 or later.","affected":[{"fixed":"7.4.0-r2","introduced":"0"}],"component":"heimdal","cve_ids":[],"ecosystem":"Alpine","ecosystem_qualifier":"Alpine:v3.16","exploited":false,"fixed_versions":["7.4.0-r2"],"id":"tcs_01M5N9BR7TT2PMA5P0V4EVQ2PD","modified_at":"2026-06-15T18:18:06.782580234Z","published_at":"2017-12-06T15:29:00.250Z","references":["https://osv.dev/vulnerability/ALPINE-CVE-2017-17439","https://security.alpinelinux.org/vuln/CVE-2017-17439"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"ALPINE-CVE-2017-17439#Alpine:v3.16/heimdal","url":"https://osv.dev/vulnerability/ALPINE-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"}