{"action":"Upgrade undertow to 1.4.18-1 or later.","affected":[{"fixed":"1.4.18-1","introduced":"0"}],"component":"undertow","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["1.4.18-1"],"id":"tcs_01M5NCD1VJFJJHN78RF8RYNGN6","modified_at":"2026-09-01T20:03:47.719349114Z","published_at":"2018-07-27T15:29:00.487Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2017-2670","https://security-tracker.debian.org/tracker/CVE-2017-2670"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2017-2670","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2017-2670"}],"summary":"It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS."}