Vulnerability-Lookup

ubuntu-cve-2023-46850

Vulnerability from osv_ubuntu

Published

2023-11-15 00:00

Modified

2025-07-16 05:09

Summary

Details

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

9.8 (Critical)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2023-46850	REPORT
	https://community.openvpn.net/openvpn/wiki/CVE-20…	REPORT
	https://openvpn.net/security-advisory/access-serv…	REPORT
	https://ubuntu.com/security/notices/USN-6484-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2023-46850	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.4.7-1ubuntu2.20.04.4"
          },
          {
            "binary_name": "openvpn-dbgsym",
            "binary_version": "2.4.7-1ubuntu2.20.04.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.4.7-1ubuntu2.20.04.4?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.7-1ubuntu2.20.04.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.7-1ubuntu2",
        "2.4.7-1ubuntu2.20.04.2",
        "2.4.7-1ubuntu2.20.04.3"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.5.5-1ubuntu3.1"
          },
          {
            "binary_name": "openvpn-dbgsym",
            "binary_version": "2.5.5-1ubuntu3.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.5.5-1ubuntu3.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.5.5-1ubuntu3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.5.1-3ubuntu1",
        "2.5.1-3ubuntu2",
        "2.5.1-3ubuntu4",
        "2.5.1-3ubuntu5",
        "2.5.5-1ubuntu1",
        "2.5.5-1ubuntu3"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2023-46850",
  "modified": "2025-07-16T05:09:41Z",
  "published": "2023-11-15T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-46850"
    },
    {
      "type": "REPORT",
      "url": "https://community.openvpn.net/openvpn/wiki/CVE-2023-46850"
    },
    {
      "type": "REPORT",
      "url": "https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6484-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-46850"
    }
  ],
  "related": [
    "USN-6484-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2023-46850"
  ],
  "withdrawn": "2025-07-18T16:54:40Z"
}

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 (v2.0.3)

CWE

CWE-416 - Use After Free

Assigner

OpenVPN

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

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T20:53:21.910Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://community.openvpn.net/openvpn/wiki/CVE-2023-46850"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2023/dsa-5555"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3FS46ANNTAVLIQY56ZKGM5CBTRVBUNE/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O54I7D753V6PU6XBU26FEROD2DSHEJQ4/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-46850",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-08-15T14:59:47.646924Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-16T18:23:24.266Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "OpenVPN 2 (Community)",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThanOrEqual": "2.6.6",
              "status": "affected",
              "version": "2.6.0",
              "versionType": "minor release"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "platforms": [
            "Linux"
          ],
          "product": "Access Server",
          "vendor": "OpenVPN",
          "versions": [
            {
              "lessThanOrEqual": "2.11.3",
              "status": "affected",
              "version": "2.11.0",
              "versionType": "patch release"
            },
            {
              "lessThanOrEqual": "2.12.2",
              "status": "affected",
              "version": "2.12.0",
              "versionType": "patch release"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416 Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-23T21:24:00.414Z",
        "orgId": "36a55730-e66d-4d39-8ca6-3c3b3017965e",
        "shortName": "OpenVPN"
      },
      "references": [
        {
          "url": "https://community.openvpn.net/openvpn/wiki/CVE-2023-46850"
        },
        {
          "url": "https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/"
        }
      ],
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "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"
}

usn-6484-1

Vulnerability from osv_ubuntu

Published

2023-11-16 13:09

Modified

2023-11-16 13:09

Summary

openvpn vulnerabilities

Details

It was discovered that OpenVPN incorrectly handled the --fragment option in certain configurations. A remote attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. (CVE-2023-46849)

It was discovered that OpenVPN incorrectly handled certain memory operations. A remote attacker could use this issue to cause OpenVPN to crash, obtain sensitive information, or possibly execute arbitrary code. (CVE-2023-46850)

References

URL

Type

	https://ubuntu.com/security/notices/USN-6484-1	ADVISORY
	https://ubuntu.com/security/CVE-2023-46849	REPORT
	https://ubuntu.com/security/CVE-2023-46850	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openvpn",
            "binary_version": "2.6.5-0ubuntu1.1"
          },
          {
            "binary_name": "openvpn-dbgsym",
            "binary_version": "2.6.5-0ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:23.10",
        "name": "openvpn",
        "purl": "pkg:deb/ubuntu/openvpn@2.6.5-0ubuntu1.1?arch=source\u0026distro=mantic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.6.5-0ubuntu1.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6.1-1ubuntu1",
        "2.6.3-1ubuntu1",
        "2.6.3-2ubuntu1",
        "2.6.5-0ubuntu1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that OpenVPN incorrectly handled the --fragment option\nin certain configurations. A remote attacker could possibly use this issue\nto cause OpenVPN to crash, resulting in a denial of service.\n(CVE-2023-46849)\n\nIt was discovered that OpenVPN incorrectly handled certain memory\noperations. A remote attacker could use this issue to cause OpenVPN to\ncrash, obtain sensitive information, or possibly execute arbitrary code.\n(CVE-2023-46850)\n",
  "id": "USN-6484-1",
  "modified": "2023-11-16T13:09:52.156615Z",
  "published": "2023-11-16T13:09:52.156615Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6484-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-46849"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2023-46850"
    }
  ],
  "related": [
    "CVE-2023-46849",
    "UBUNTU-CVE-2023-46849",
    "CVE-2023-46850",
    "UBUNTU-CVE-2023-46850"
  ],
  "schema_version": "1.6.3",
  "summary": "openvpn vulnerabilities"
}

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.

Action not permitted

ubuntu-cve-2023-46850

Vulnerability from osv_ubuntu

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

usn-6484-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature