{"id":"CVE-2017-7478","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-7478","generatedAt":"2026-10-28T20:08:11.814Z","title":"OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet.","description":"OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.","published":"2017-05-15T18:29:00.000Z","lastModified":"2026-06-17T01:24:26.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-617","CWE-20"],"affected":["openvpn/openvpn"],"epss":{"score":0.13783,"percentile":0.96496,"date":"2026-10-27","history":[{"date":"2026-09-21","score":0.11561,"percentile":0.95896},{"date":"2026-09-22","score":0.13783,"percentile":0.96341}]},"kev":{"listed":false},"exploits":{"count":1,"verified":true,"firstPublished":"2017-05-11","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":41993,"kind":"exploit","title":"OpenVPN 2.4.0 - Denial of Service","url":"https://www.exploit-db.com/exploits/41993","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/41993.py","file":"exploits/multiple/dos/41993.py","published":"2017-05-11","added":"2017-05-11","updated":"2017-05-11","author":"QuarksLab","type":"dos","platform":"multiple","port":1194,"verified":true,"codes":["CVE-2017-7478"],"tags":"Denial of Service (DoS)","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":"https://ostif.org/the-openvpn-2-4-0-audit-by-ostif-and-quarkslab-results/"}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 13.8%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/98444","source":"secalert@redhat.com"},{"url":"http://www.securitytracker.com/id/1038473","source":"secalert@redhat.com"},{"url":"https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://www.exploit-db.com/exploits/41993/","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/98444","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1038473","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/41993/","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-7478","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."}