FKIE_CVE-2021-4234

Vulnerability from fkie_nvd - Published: 2022-07-06 20:15 - Updated: 2024-11-21 06:37
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack.
References
security@openvpn.nethttps://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0Release Notes, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0Release Notes, Vendor Advisory
Impacted products
Vendor Product Version
openvpn openvpn_access_server *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openvpn:openvpn_access_server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F315C5F8-CF55-4561-87FA-09A49636FDCB",
              "versionEndExcluding": "2.11.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack."
    },
    {
      "lang": "es",
      "value": "OpenVPN Access Server versiones 2.10 y versiones anteriores, son susceptibles de reenviar m\u00faltiples paquetes en respuesta a un paquete de reinicio enviado desde el cliente al que \u00e9ste no responde de nuevo, resultando en un ataque de amplificaci\u00f3n limitada"
    }
  ],
  "id": "CVE-2021-4234",
  "lastModified": "2024-11-21T06:37:12.167",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2022-07-06T20:15:08.127",
  "references": [
    {
      "source": "security@openvpn.net",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ],
      "url": "https://openvpn.net/vpn-server-resources/release-notes/#openvpn-access-server-2-11-0"
    }
  ],
  "sourceIdentifier": "security@openvpn.net",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-406"
        }
      ],
      "source": "security@openvpn.net",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • 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.