Vulnerability-Lookup

WID-SEC-W-2023-2872

Vulnerability from csaf_certbund - Published: 2023-11-09 23:00 - Updated: 2024-09-22 22:00

Summary

OpenVPN: Mehrere Schwachstellen

Severity

Mittel

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 authentifizierter Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen oder vertrauliche Informationen offenzulegen.

Betroffene Betriebssysteme: - Linux - MacOS X - Sonstiges - UNIX - Windows

CVE-2023-46849

Affected products

Known affected 5 products

Product	Identifier	Version
Open Source OpenVPN <2.6.7 Open Source / OpenVPN		<2.6.7
Debian Linux Debian	`cpe:/o:debian:debian_linux:-`	—
Ubuntu Linux Ubuntu	`cpe:/o:canonical:ubuntu_linux:-`	—
Gentoo Linux Gentoo	`cpe:/o:gentoo:linux:-`	—
Fedora Linux Fedora	`cpe:/o:fedoraproject:fedora:-`	—

CVE-2023-46850

Affected products

Known affected 5 products, the same list as for CVE-2023-46849

References

8 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://github.com/OpenVPN/openvpn/blob/v2.6.7/Ch…	external
https://lists.debian.org/debian-security-announce…	external
https://ubuntu.com/security/notices/USN-6484-1	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://bodhi.fedoraproject.org/updates/FEDORA-20…	external
https://security.gentoo.org/glsa/202409-08	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "mittel"
    },
    "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 authentifizierter Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um einen Denial-of-Service-Zustand zu erzeugen oder vertrauliche Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- MacOS X\n- 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-2023-2872 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2023/wid-sec-w-2023-2872.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2023-2872 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-2872"
      },
      {
        "category": "external",
        "summary": "GitHub OpenVPN vom 2023-11-09",
        "url": "https://github.com/OpenVPN/openvpn/blob/v2.6.7/Changes.rst"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-5555 vom 2023-11-15",
        "url": "https://lists.debian.org/debian-security-announce/2023/msg00251.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-6484-1 vom 2023-11-16",
        "url": "https://ubuntu.com/security/notices/USN-6484-1"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2023-D9D55A0BFC vom 2023-11-20",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2023-d9d55a0bfc"
      },
      {
        "category": "external",
        "summary": "Fedora Security Advisory FEDORA-2023-E4DF33666C vom 2023-11-20",
        "url": "https://bodhi.fedoraproject.org/updates/FEDORA-2023-e4df33666c"
      },
      {
        "category": "external",
        "summary": "Gentoo Linux Security Advisory GLSA-202409-08 vom 2024-09-22",
        "url": "https://security.gentoo.org/glsa/202409-08"
      }
    ],
    "source_lang": "en-US",
    "title": "OpenVPN: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2024-09-22T22:00:00.000+00:00",
      "generator": {
        "date": "2026-07-16T16:55:31.814+00:00",
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      "revision_history": [
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          "date": "2023-11-09T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2023-11-15T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2023-11-16T23:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
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          "number": "4",
          "summary": "Neue Updates von Fedora aufgenommen"
        },
        {
          "date": "2024-09-22T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Gentoo aufgenommen"
        }
      ],
      "status": "final",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
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            "category": "product_name",
            "name": "Fedora Linux",
            "product": {
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              "product_id": "74185",
              "product_identification_helper": {
                "cpe": "cpe:/o:fedoraproject:fedora:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Fedora"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Gentoo Linux",
            "product": {
              "name": "Gentoo Linux",
              "product_id": "T012167",
              "product_identification_helper": {
                "cpe": "cpe:/o:gentoo:linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Gentoo"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c2.6.7",
                "product": {
                  "name": "Open Source OpenVPN \u003c2.6.7",
                  "product_id": "T031038"
                }
              },
              {
                "category": "product_version",
                "name": "2.6.7",
                "product": {
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                  "product_id": "T031038-fixed",
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        "branches": [
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            "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": [
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      "cve": "CVE-2023-46849",
      "product_status": {
        "known_affected": [
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          "2951",
          "T000126",
          "T012167",
          "74185"
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      "title": "CVE-2023-46849"
    },
    {
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      "product_status": {
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          "T031038",
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          "T000126",
          "T012167",
          "74185"
        ]
      },
      "release_date": "2023-11-09T23:00:00.000+00:00",
      "title": "CVE-2023-46850"
    }
  ]
}

CVE-2023-46849 (GCVE-0-2023-46849)

Vulnerability from cvelistv5 – Published: 2023-11-11 00:05 – Updated: 2025-06-11 14:30

Summary

Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-06-11 14:28 UTC

CWE

CWE-369 - Divide By Zero

Assigner

OpenVPN mitre root Scorecard

References

5 references

URL	Tags
https://community.openvpn.net/openvpn/wiki/CVE-20…
https://openvpn.net/security-advisory/access-serv…
https://www.debian.org/security/2023/dsa-5555
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

2 products

Vendor	Product	Version
OpenVPN	OpenVPN 2 (Community)	Affected: 2.6.0 , ≤ 2.6.6 (minor release)
OpenVPN	Access Server	Affected: 2.11.0 , ≤ 2.11.3 (patch release) Affected: 2.12.0 , ≤ 2.12.1 (patch release)

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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CVE-2023-46850 (GCVE-0-2023-46850)

Vulnerability from cvelistv5 – Published: 2023-11-11 00:15 – Updated: 2026-06-23 21:24

Summary

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-08-15 14:59 UTC

CWE

CWE-416 - Use After Free

Assigner

OpenVPN mitre root Scorecard

References

5 references

URL	Tags
https://community.openvpn.net/openvpn/wiki/CVE-20…
https://openvpn.net/security-advisory/access-serv…
https://www.debian.org/security/2023/dsa-5555	x_transferred
https://lists.fedoraproject.org/archives/list/pac…	x_transferred
https://lists.fedoraproject.org/archives/list/pac…	x_transferred

Impacted products

2 products

Vendor	Product	Version
OpenVPN	OpenVPN 2 (Community)	Affected: 2.6.0 , ≤ 2.6.6 (minor release)
OpenVPN	Access Server	Affected: 2.11.0 , ≤ 2.11.3 (patch release) Affected: 2.12.0 , ≤ 2.12.2 (patch release)

Show details on NVD website

JSON

To clipboard

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  },
  "cveMetadata": {
    "assignerOrgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
    "assignerShortName": "OpenVPN",
    "cveId": "CVE-2023-46850",
    "datePublished": "2023-11-11T00:15:07.076Z",
    "dateReserved": "2023-10-27T13:38:49.496Z",
    "dateUpdated": "2026-06-23T21:24:00.414Z",
    "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.

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.

Action not permitted

WID-SEC-W-2023-2872

CVE-2023-46849 (GCVE-0-2023-46849)

CVE-2023-46850 (GCVE-0-2023-46850)

Tags

Sightings

Nomenclature

Related by attack behaviour