{"id":"CVE-2019-14899","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-14899","generatedAt":"2026-10-28T21:26:55.017Z","title":"A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make positive inferences about the websites they are visiting,…","description":"A vulnerability was discovered in Linux, FreeBSD, OpenBSD, MacOS, iOS, and Android that allows a malicious access point, or an adjacent user, to determine if a connected user is using a VPN, make positive inferences about the websites they are visiting, and determine the correct sequence and acknowledgement numbers in use, allowing the bad actor to inject data into the TCP stream. This provides everything that is needed for an attacker to hijack active connections inside the VPN tunnel.","published":"2019-12-11T15:15:14.000Z","lastModified":"2026-06-17T02:19:17.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.4,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-300"],"affected":["freebsd/freebsd","linux/linux kernel","openbsd/openbsd","apple/ipados","apple/iphone os","apple/mac os x","apple/macos","apple/tvos"],"epss":{"score":0.00838,"percentile":0.57614,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://seclists.org/fulldisclosure/2020/Dec/32","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2020/Jul/23","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2020/Jul/24","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2020/Jul/25","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2020/Nov/20","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2020/08/13/2","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2020/10/07/3","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2021/07/05/1","tags":["Mailing List","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899","tags":["Issue Tracking","Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://support.apple.com/kb/HT211288","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://support.apple.com/kb/HT211289","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://support.apple.com/kb/HT211290","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://support.apple.com/kb/HT211850","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"https://support.apple.com/kb/HT211931","tags":["Third Party Advisory"],"source":"secalert@redhat.com"},{"url":"http://seclists.org/fulldisclosure/2020/Dec/32","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2020/Jul/23","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2020/Jul/24","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2020/Jul/25","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://seclists.org/fulldisclosure/2020/Nov/20","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2020/08/13/2","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2020/10/07/3","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2021/07/05/1","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14899","tags":["Issue Tracking","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://openvpn.net/security-advisory/no-flaws-found-in-openvpn-software/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT211288","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT211289","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT211290","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT211850","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://support.apple.com/kb/HT211931","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-14899","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."}