Vulnerability-Lookup

OESA-2022-1612 (CVE-2022-0547)

Vulnerability from osv_openeuler – Published: 2022-04-12 11:04 – Updated: 2026-08-06 11:04 – Source website

Summary

openvpn security update

Details

OpenVPN can be extended through the --plugin option, which provides possibilities to add specialized authentication, user accounting, packet filtering and related features. These plug-ins need to be written in C and provides a more low-level and information rich access to similar features as the various script-hooks.

Security Fix(es):

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.(CVE-2022-0547)

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2022-0547	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "openvpn-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-devel-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-debuginfo-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-debugsource-2.4.8-8.oe1.aarch64.rpm"
        ],
        "noarch": [
          "openvpn-help-2.4.8-8.oe1.noarch.rpm"
        ],
        "src": [
          "openvpn-2.4.8-8.oe1.src.rpm"
        ],
        "x86_64": [
          "openvpn-debuginfo-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-devel-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-debugsource-2.4.8-8.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "openvpn",
        "purl": "pkg:rpm/openEuler/openvpn\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.8-8.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "openvpn-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-devel-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-debuginfo-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-debugsource-2.4.8-8.oe1.aarch64.rpm"
        ],
        "noarch": [
          "openvpn-help-2.4.8-8.oe1.noarch.rpm"
        ],
        "src": [
          "openvpn-2.4.8-8.oe1.src.rpm"
        ],
        "x86_64": [
          "openvpn-debuginfo-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-devel-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-debugsource-2.4.8-8.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP2",
        "name": "openvpn",
        "purl": "pkg:rpm/openEuler/openvpn\u0026distro=openEuler-20.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.8-8.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "openvpn-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-devel-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-debuginfo-2.4.8-8.oe1.aarch64.rpm",
          "openvpn-debugsource-2.4.8-8.oe1.aarch64.rpm"
        ],
        "noarch": [
          "openvpn-help-2.4.8-8.oe1.noarch.rpm"
        ],
        "src": [
          "openvpn-2.4.8-8.oe1.src.rpm"
        ],
        "x86_64": [
          "openvpn-debuginfo-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-devel-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-2.4.8-8.oe1.x86_64.rpm",
          "openvpn-debugsource-2.4.8-8.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "openvpn",
        "purl": "pkg:rpm/openEuler/openvpn\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.8-8.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "openvpn-2.5.5-2.oe2203.aarch64.rpm",
          "openvpn-devel-2.5.5-2.oe2203.aarch64.rpm",
          "openvpn-debuginfo-2.5.5-2.oe2203.aarch64.rpm",
          "openvpn-debugsource-2.5.5-2.oe2203.aarch64.rpm"
        ],
        "noarch": [
          "openvpn-help-2.5.5-2.oe2203.noarch.rpm"
        ],
        "src": [
          "openvpn-2.5.5-2.oe2203.src.rpm"
        ],
        "x86_64": [
          "openvpn-debuginfo-2.5.5-2.oe2203.x86_64.rpm",
          "openvpn-devel-2.5.5-2.oe2203.x86_64.rpm",
          "openvpn-2.5.5-2.oe2203.x86_64.rpm",
          "openvpn-debugsource-2.5.5-2.oe2203.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "openvpn",
        "purl": "pkg:rpm/openEuler/openvpn\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.5-2.oe2203"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Critical"
  },
  "details": "OpenVPN can be extended through the --plugin option, which provides possibilities to add specialized authentication, user accounting, packet filtering and related features. These plug-ins need to be written in C and provides a more low-level and information rich access to similar features as the various script-hooks.\r\n\r\nSecurity Fix(es):\r\n\r\nOpenVPN 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.(CVE-2022-0547)",
  "id": "OESA-2022-1612",
  "modified": "2026-08-06T11:04:53Z",
  "published": "2022-04-12T11:04:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1612"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-0547"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "openvpn security update",
  "upstream": [
    "CVE-2022-0547"
  ]
}

CVE-2022-0547 (GCVE-0-2022-0547)

Vulnerability from cvelistv5 – Published: 2022-03-18 18:00 – Updated: 2025-11-03 20:34

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 13:27 UTC

CWE

CWE-305 - - Authentication Bypass by Primary Weakness

Assigner

OpenVPN mitre root

References

7 references

URL	Tags
https://community.openvpn.net/openvpn/wiki/Securi…	x_refsource_MISC
https://community.openvpn.net/openvpn/wiki/CVE-20…	x_refsource_MISC
https://openvpn.net/community-downloads/	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

1 product

Vendor	Product	Version
n/a	OpenVPN	Affected: version 2.1 until version 2.4.12 and 2.5.6.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:34:30.191Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "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/"
          },
          {
            "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/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/"
          },
          {
            "name": "FEDORA-2022-cb4c1146dc",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/"
          },
          {
            "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/2022/05/msg00002.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00005.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-0547",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-04-23T13:27:37.639278Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-04-23T18:46:01.507Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "OpenVPN",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "version 2.1 until version 2.4.12 and 2.5.6."
            }
          ]
        }
      ],
      "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-305",
              "description": "CWE-305 - Authentication Bypass by Primary Weakness",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-05-03T13:06:11.000Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "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/"
        },
        {
          "name": "FEDORA-2022-7d46acce7c",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R36OYC5SJ6FLPVAYJYYT4MOJ2I7MGYFF/"
        },
        {
          "name": "FEDORA-2022-cb4c1146dc",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJ35WKPME4HYNQCQNAJHLCZOJL2SAE/"
        },
        {
          "name": "[debian-lts-announce] 20220503 [SECURITY] [DLA 2992-1] openvpn security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00002.html"
        }
      ],
      "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"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2022-0547",
    "datePublished": "2022-03-18T18:00:20.000Z",
    "dateReserved": "2022-02-08T00:00:00.000Z",
    "dateUpdated": "2025-11-03T20:34:30.191Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.