{"id":"CVE-2021-3773","details":"A flaw in netfilter could allow a network-connected attacker to infer openvpn connection endpoint information for further use in traditional network attacks.","modified":"2026-03-14T11:04:06.592853Z","published":"2022-02-16T19:15:08.763Z","related":["ALSA-2022:1988"],"references":[{"type":"WEB","url":"https://citizenlab.ca/2024/07/vulnerabilities-in-vpns-paper-presented-at-the-privacy-enhancing-technologies-symposium-2024/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20250328-0004/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2004949"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujul2022.html"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.14"}]},{"events":[{"introduced":"5.15"},{"fixed":"5.15.15"}]},{"events":[{"introduced":"0"},{"last_affected":"34"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"22.1.3"}]},{"events":[{"introduced":"0"},{"last_affected":"22.1.1"}]},{"events":[{"introduced":"0"},{"last_affected":"22.2.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3773.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}