{"id":"CVE-2019-6442","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-6442","generatedAt":"2026-10-27T23:38:12.569Z","title":"An authenticated attacker can write one byte out of bounds in ntpd via a malformed config request, related to config_remotely in ntp_config.c, yyparse in ntp_parser.tab.c, and yyerror in ntp_parser.y.","description":"An issue was discovered in NTPsec before 1.1.3. An authenticated attacker can write one byte out of bounds in ntpd via a malformed config request, related to config_remotely in ntp_config.c, yyparse in ntp_parser.tab.c, and yyerror in ntp_parser.y.","published":"2019-01-16T05:29:01.000Z","lastModified":"2026-06-17T02:39:03.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-787"],"affected":["ntpsec/ntpsec"],"epss":{"score":0.1371,"percentile":0.96474,"date":"2026-10-26","history":[{"date":"2026-09-21","score":0.10643,"percentile":0.9566},{"date":"2026-09-22","score":0.1371,"percentile":0.96325}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2019-01-16","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":46178,"kind":"exploit","title":"NTPsec 1.1.2 - 'config' (Authenticated) Out-of-Bounds Write Denial of Service (PoC)","url":"https://www.exploit-db.com/exploits/46178","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/46178.py","file":"exploits/linux/dos/46178.py","published":"2019-01-16","added":"2019-01-16","updated":"2019-03-17","author":"Magnus Klaaborg Stubman","type":"dos","platform":"linux","port":123,"verified":true,"codes":["CVE-2019-6442"],"tags":"Out Of Bounds","aliases":null,"applicationUrl":"http://www.exploit-db.comntpsec-1.1.2.tar.gz","screenshotUrl":null,"referenceUrl":"https://dumpco.re/bugs/ntpsec-authed-oobwrite"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 13.7%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"https://dumpco.re/blog/ntpsec-bugs","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://dumpco.re/bugs/ntpsec-authed-oobwrite","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS","tags":["Release Notes","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/46178/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://dumpco.re/blog/ntpsec-bugs","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://dumpco.re/bugs/ntpsec-authed-oobwrite","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/ntpsec/ntpsec/blob/NTPsec_1_1_3/NEWS","tags":["Release Notes","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/46178/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-6442","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."}