{"id":"CVE-2022-0547","state":"PUBLISHED","title":"OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, w","description":"OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials.","publishedAt":"2022-03-18T18:00:20.000Z","updatedAt":"2025-11-03T20:34:30.191Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"OpenVPN","products":["n/a OpenVPN"],"affected":[{"vendor":"n/a","product":"OpenVPN","versions":[{"version":"version 2.1 until version 2.4.12 and 2.5.6.","status":"affected"}]}],"references":["https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements","https://community.openvpn.net/openvpn/wiki/CVE-2022-0547","https://openvpn.net/community-downloads/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/","https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html"],"weaknesses":["CWE-305"],"ingestedAt":"2026-10-29T19:49:26.075Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/0xxx/CVE-2022-0547.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-0547","state":"PUBLISHED","datePublished":"2022-03-18T18:00:20.000Z","dateUpdated":"2025-11-03T20:34:30.191Z","assignerShortName":"OpenVPN","assignerOrgId":"36a55730-e66d-4d39-8ca6-3c3b3017965e","dateReserved":"2022-02-08T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials."}],"affected":[{"vendor":"n/a","product":"OpenVPN","versions":[{"version":"version 2.1 until version 2.4.12 and 2.5.6.","status":"affected"}]}],"references":[{"url":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements","tags":["x_refsource_MISC"]},{"url":"https://community.openvpn.net/openvpn/wiki/CVE-2022-0547","tags":["x_refsource_MISC"]},{"url":"https://openvpn.net/community-downloads/","tags":["x_refsource_MISC"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/","name":"FEDORA-2022-7d46acce7c","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/","name":"FEDORA-2022-cb4c1146dc","tags":["vendor-advisory","x_refsource_FEDORA"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","name":"[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update","tags":["mailing-list","x_refsource_MLIST"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-305","description":"CWE-305 - Authentication Bypass by Primary Weakness","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"OpenVPN","dateUpdated":"2022-05-03T13:06:11.000Z","orgId":"36a55730-e66d-4d39-8ca6-3c3b3017965e"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@openvpn.net","ID":"CVE-2022-0547","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"OpenVPN","version":{"version_data":[{"version_value":"version 2.1 until version 2.4.12 and 2.5.6."}]}}]},"vendor_name":"n/a"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-305 - Authentication Bypass by Primary Weakness"}]}]},"references":{"reference_data":[{"name":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements","refsource":"MISC","url":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements"},{"name":"https://community.openvpn.net/openvpn/wiki/CVE-2022-0547","refsource":"MISC","url":"https://community.openvpn.net/openvpn/wiki/CVE-2022-0547"},{"name":"https://openvpn.net/community-downloads/","refsource":"MISC","url":"https://openvpn.net/community-downloads/"},{"name":"FEDORA-2022-7d46acce7c","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/"},{"name":"FEDORA-2022-cb4c1146dc","refsource":"FEDORA","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/"},{"name":"[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update","refsource":"MLIST","url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://community.openvpn.net/openvpn/wiki/SecurityAnnouncements","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://community.openvpn.net/openvpn/wiki/CVE-2022-0547","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://openvpn.net/community-downloads/","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/","name":"FEDORA-2022-7d46acce7c","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/","name":"FEDORA-2022-cb4c1146dc","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html","name":"[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T20:34:30.191Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":9.8,"attackVector":"NETWORK","baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-23T13:27:37.639278Z","id":"CVE-2022-0547","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-04-23T18:46:01.507Z"}}]}}}