csaf_certbund - wid-sec-w-2025-2636

WID-SEC-W-2025-2636

Vulnerability from csaf_certbund - Published: 2025-11-18 23:00 - Updated: 2025-12-01 23:00

Summary

OpenVPN: Mehrere Schwachstellen

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung

OpenVPN ist eine Open Source Software zum Aufbau eines Virtuellen Privaten Netzwerkes (VPN) über eine verschlüsselte TLS-Verbindung. Zur Verschlüsselung werden die Bibliotheken des Programmes OpenSSL benutzt.

Angriff

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um Sicherheitsmaßnahmen zu umgehen und andere nicht näher spezifizierte Angriffe durchzuführen, beispielsweise einen Denial-of-Service-Zustand herbeizuführen oder vertrauliche Informationen offenzulegen.

Betroffene Betriebssysteme

- Sonstiges - UNIX - Windows

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "OpenVPN ist eine Open Source Software zum Aufbau eines Virtuellen Privaten Netzwerkes (VPN) \u00fcber eine verschl\u00fcsselte TLS-Verbindung. Zur Verschl\u00fcsselung werden die Bibliotheken des Programmes OpenSSL benutzt.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um Sicherheitsma\u00dfnahmen zu umgehen und andere nicht n\u00e4her spezifizierte Angriffe durchzuf\u00fchren, beispielsweise einen Denial-of-Service-Zustand herbeizuf\u00fchren oder vertrauliche Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Sonstiges\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2025-2636 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2636.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2025-2636 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2025-2636"
      },
      {
        "category": "external",
        "summary": "OpenVPN Security Announcement CVE-2025-12106 vom 2025-11-18",
        "url": "https://community.openvpn.net/Security%20Announcements/CVE-2025-12106"
      },
      {
        "category": "external",
        "summary": "OpenVPN Security Announcement CVE-2025-13086 vom 2025-11-18",
        "url": "https://community.openvpn.net/Security%20Announcements/CVE-2025-13086"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-7898-1 vom 2025-11-27",
        "url": "https://ubuntu.com/security/notices/USN-7898-1"
      }
    ],
    "source_lang": "en-US",
    "title": "OpenVPN: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2025-12-01T23:00:00.000+00:00",
      "generator": {
        "date": "2025-12-02T07:52:16.993+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2025-2636",
      "initial_release_date": "2025-11-18T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2025-11-18T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2025-11-19T23:00:00.000+00:00",
          "number": "2",
          "summary": "bei CVE-2025-13086 OpenVPN \u003c 2.6.16 ebenfalls betroffen"
        },
        {
          "date": "2025-11-27T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2025-12-01T23:00:00.000+00:00",
          "number": "4",
          "summary": "Referenz(en) aufgenommen: EUVD-2025-199988, 2417983"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.7_rc2",
                "product": {
                  "name": "Open Source OpenVPN \u003c2.7_rc2",
                  "product_id": "T048724"
                }
              },
              {
                "category": "product_version",
                "name": "2.7_rc2",
                "product": {
                  "name": "Open Source OpenVPN 2.7_rc2",
                  "product_id": "T048724-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:openvpn:openvpn:2.7_rc2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c2.6.16",
                "product": {
                  "name": "Open Source OpenVPN \u003c2.6.16",
                  "product_id": "T048746"
                }
              },
              {
                "category": "product_version",
                "name": "2.6.16",
                "product": {
                  "name": "Open Source OpenVPN 2.6.16",
                  "product_id": "T048746-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:openvpn:openvpn:2.6.16"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "OpenVPN"
          }
        ],
        "category": "vendor",
        "name": "Open Source"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-12106",
      "product_status": {
        "known_affected": [
          "T048724",
          "T000126"
        ]
      },
      "release_date": "2025-11-18T23:00:00.000+00:00",
      "title": "CVE-2025-12106"
    },
    {
      "cve": "CVE-2025-13086",
      "product_status": {
        "known_affected": [
          "T048724",
          "T048746",
          "T000126"
        ]
      },
      "release_date": "2025-11-18T23:00:00.000+00:00",
      "title": "CVE-2025-13086"
    }
  ]
}

CVE-2025-13086 (GCVE-0-2025-13086)

Vulnerability from cvelistv5 – Published: 2025-12-03 19:54 – Updated: 2025-12-03 21:49

Summary

Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client

Severity ?

4.6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

CWE

CWE-940 - Improper Verification of Source of a Communication Channel

Assigner

OpenVPN

References

URL

Tags

	https://community.openvpn.net/Security%20Announce…	vendor-advisory
	https://www.mail-archive.com/openvpn-announce@lis…	release-notes
	https://www.mail-archive.com/openvpn-announce@lis…	release-notes

Impacted products

	Vendor	Product	Version
	OpenVPN	OpenVPN	Affected: 2.6.0 , ≤ 2.7_rc1 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-13086",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-03T21:48:54.419203Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-03T21:49:07.801Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenVPN",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThanOrEqual": "2.7_rc1",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client"
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 4.6,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "UNREPORTED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-940",
              "description": "CWE-940: Improper Verification of Source of a Communication Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-03T19:54:10.737Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://community.openvpn.net/Security%20Announcements/CVE-2025-13086"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00151.html"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2025-13086",
    "datePublished": "2025-12-03T19:54:10.737Z",
    "dateReserved": "2025-11-12T19:37:55.606Z",
    "dateUpdated": "2025-12-03T21:49:07.801Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-12106 (GCVE-0-2025-12106)

Vulnerability from cvelistv5 – Published: 2025-12-01 12:43 – Updated: 2025-12-01 18:50

Summary

Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

Severity ?

9.1 (Critical)


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

CWE

CWE-126 - Buffer Over-read

Assigner

OpenVPN

References

URL

Tags

	https://community.openvpn.net/Security%20Announce…	vendor-advisory
	https://www.mail-archive.com/openvpn-announce@lis…	release-notes

Impacted products

	Vendor	Product	Version
	OpenVPN	OpenVPN	Affected: 2.7_alpha1 , ≤ 2.7_rc1 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-12106",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-01T18:49:24.604801Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-01T18:50:28.995Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenVPN",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThanOrEqual": "2.7_rc1",
              "status": "affected",
              "version": "2.7_alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-126",
              "description": "CWE-126: Buffer Over-read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-01T12:43:02.480Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://community.openvpn.net/Security%20Announcements/CVE-2025-12106"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.html"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2025-12106",
    "datePublished": "2025-12-01T12:43:02.480Z",
    "dateReserved": "2025-10-23T08:47:11.843Z",
    "dateUpdated": "2025-12-01T18:50:28.995Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

WID-SEC-W-2025-2636

CVE-2025-13086 (GCVE-0-2025-13086)

CVE-2025-12106 (GCVE-0-2025-12106)

Tags

Sightings

Nomenclature