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CVE-2023-46849

Estado: ModificadaAlta (7.5)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (4)

Debian — Debian LinuxFedoraproject — FedoraOpenvpn — OpenvpnOpenvpn — Openvpn Access Server

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2023-46849",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-46849",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-06-11T14:28:40.866061Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@openvpn.net",
      "affectedData": [
        {
          "vendor": "OpenVPN",
          "product": "OpenVPN 2 (Community)",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.0",
              "versionType": "minor release",
              "lessThanOrEqual": "2.6.6"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "OpenVPN",
          "product": "Access Server",
          "versions": [
            {
              "status": "affected",
              "version": "2.11.0",
              "versionType": "patch release",
              "lessThanOrEqual": "2.11.3"
            },
            {
              "status": "affected",
              "version": "2.12.0",
              "versionType": "patch release",
              "lessThanOrEqual": "2.12.1"
            }
          ],
          "platforms": [
            "Linux"
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2023-11-11T01:15:07.270",
  "references": [
    {
      "url": "https://community.openvpn.net/openvpn/wiki/CVE-2023-46849",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@openvpn.net"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3FS46ANNTAVLIQY56ZKGM5CBTRVBUNE/",
      "tags": [
        "Mailing List"
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    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O54I7D753V6PU6XBU26FEROD2DSHEJQ4/",
      "source": "security@openvpn.net"
    },
    {
      "url": "https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@openvpn.net"
    },
    {
      "url": "https://www.debian.org/security/2023/dsa-5555",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security@openvpn.net"
    },
    {
      "url": "https://community.openvpn.net/openvpn/wiki/CVE-2023-46849",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3FS46ANNTAVLIQY56ZKGM5CBTRVBUNE/",
      "tags": [
        "Mailing List"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O54I7D753V6PU6XBU26FEROD2DSHEJQ4/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "tags": [
        "Vendor Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@openvpn.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-369"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-369"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "El uso de la opción --fragment en ciertas configuraciones de OpenVPN versión 2.6.0 a 2.6.6 permite a un atacante desencadenar un comportamiento de división por cero que podría provocar un bloqueo de la aplicación y provocar una denegación de servicio."
    }
  ],
  "lastModified": "2026-06-17T06:31:45.597",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*",
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              "matchCriteriaId": "3A398A7A-395F-4CA8-9D72-1DDD337D5074",
              "versionEndIncluding": "2.6.6",
              "versionStartIncluding": "2.6.0"
            },
            {
              "criteria": "cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "54464223-5988-40E7-B94B-D7B8DE999704",
              "versionEndIncluding": "2.11.3",
              "versionStartIncluding": "2.11.0"
            },
            {
              "criteria": "cpe:2.3:a:openvpn:openvpn_access_server:2.12.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F8A71564-0966-47F0-BB81-B6BFA071E402"
            },
            {
              "criteria": "cpe:2.3:a:openvpn:openvpn_access_server:2.12.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AC187755-A908-4CD5-8F35-869EA5D9A3B7"
            }
          ],
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*",
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              "matchCriteriaId": "46D69DCC-AE4D-4EA5-861C-D60951444C6C"
            },
            {
              "criteria": "cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*",
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              "matchCriteriaId": "B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646"
            }
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        }
      ]
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  ],
  "sourceIdentifier": "security@openvpn.net"
}