{"id":"CVE-2019-17420","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-17420","generatedAt":"2026-10-27T22:25:12.952Z","title":"In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP protocol parsing error causes the http_header signature to not alert on a response with a single \\r\\n ending.","description":"In OISF LibHTP before 0.5.31, as used in Suricata 4.1.4 and other products, an HTTP protocol parsing error causes the http_header signature to not alert on a response with a single \\r\\n ending.","published":"2019-10-10T01:06:10.000Z","lastModified":"2026-06-17T02:23:56.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-459"],"affected":["oisf/libhtp","suricata-ids/suricata"],"epss":{"score":0.01355,"percentile":0.71421,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.35%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/OISF/libhtp/compare/0.5.30...0.5.31","tags":["Patch"],"source":"cve@mitre.org"},{"url":"https://github.com/OISF/libhtp/pull/213","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://redmine.openinfosecfoundation.org/issues/2969","tags":["Issue Tracking","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/OISF/libhtp/compare/0.5.30...0.5.31","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/OISF/libhtp/pull/213","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://redmine.openinfosecfoundation.org/issues/2969","tags":["Issue Tracking","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-17420","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}