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CVE-2022-0023

Estado: ModificadaMedia (5.9)—

An improper handling of exceptional conditions vulnerability exists in the DNS proxy feature of Palo Alto Networks PAN-OS software that enables a meddler-in-the-middle (MITM) to send specifically crafted traffic to the firewall that causes the service to restart unexpectedly. Repeated attempts to send this request result in denial-of-service to all PAN-OS services by restarting the device in maintenance mode. This issue does not impact Panorama appliances and Prisma Access customers.

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This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.22; PAN-OS 9.0 versions earlier than PAN-OS 9.0.16; PAN-OS 9.1 versions earlier than PAN-OS 9.1.13; PAN-OS 10.0 versions earlier than PAN-OS 10.0.10; PAN-OS 10.1 versions earlier than PAN-OS 10.1.5. This issue does not impact PAN-OS 10.2.

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 (1)

Paloaltonetworks — Pan-os

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-0023",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@paloaltonetworks.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.2
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          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
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  },
  "affected": [
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      "affectedData": [
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          "vendor": "Palo Alto Networks",
          "product": "PAN-OS",
          "versions": [
            {
              "status": "unaffected",
              "version": "10.2.*"
            },
            {
              "status": "affected",
              "changes": [
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                  "status": "unaffected"
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              "version": "8.1",
              "lessThan": "8.1.22",
              "versionType": "custom"
            },
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              "status": "affected",
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              "version": "9.1",
              "lessThan": "9.1.13",
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              "status": "affected",
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              "version": "10.1",
              "lessThan": "10.1.5",
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              "version": "10.0",
              "lessThan": "10.0.10",
              "versionType": "custom"
            },
            {
              "status": "affected",
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              "version": "9.0",
              "lessThan": "9.0.16",
              "versionType": "custom"
            }
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        },
        {
          "vendor": "Palo Alto Networks",
          "product": "Prisma Access",
          "versions": [
            {
              "status": "unaffected",
              "version": "3.0 Preferred, Innovation"
            },
            {
              "status": "unaffected",
              "version": "2.2 Preferred"
            },
            {
              "status": "unaffected",
              "version": "2.1 Preferred, Innovation"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-04-13T19:15:09.057",
  "references": [
    {
      "url": "https://security.paloaltonetworks.com/CVE-2022-0023",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@paloaltonetworks.com"
    },
    {
      "url": "https://security.paloaltonetworks.com/CVE-2022-0023",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@paloaltonetworks.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An improper handling of exceptional conditions vulnerability exists in the DNS proxy feature of Palo Alto Networks PAN-OS software that enables a meddler-in-the-middle (MITM) to send specifically crafted traffic to the firewall that causes the service to restart unexpectedly. Repeated attempts to send this request result in denial-of-service to all PAN-OS services by restarting the device in maintenance mode. This issue does not impact Panorama appliances and Prisma Access customers. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.22; PAN-OS 9.0 versions earlier than PAN-OS 9.0.16; PAN-OS 9.1 versions earlier than PAN-OS 9.1.13; PAN-OS 10.0 versions earlier than PAN-OS 10.0.10; PAN-OS 10.1 versions earlier than PAN-OS 10.1.5. This issue does not impact PAN-OS 10.2."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de manejo inapropiado de condiciones excepcionales en la función de proxy DNS del software PAN-OS de Palo Alto Networks que permite a un atacante de tipo meddler-in-the-middle (MITM) enviar tráfico específicamente diseñado al firewall que causa un reinicio no esperado del servicio. Los intentos repetidos de enviar esta petición resultan en una denegación de servicio a todos los servicios de PAN-OS, reiniciando el dispositivo en modo de mantenimiento. Este problema no afecta a dispositivos de Panorama ni a clientes de Prisma Access. Este problema afecta a: PAN-OS versiones anteriores a 8.1.22; PAN-OS 9.0 versiones anteriores a PAN-OS 9.0.16; PAN-OS 9.1 versiones anteriores a PAN-OS 9.1.13; PAN-OS 10.0 versiones anteriores a PAN-OS 10.0.10; PAN-OS 10.1 versiones anteriores a PAN-OS 10.1.5. Este problema no afecta a PAN-OS versión 10.2"
    }
  ],
  "lastModified": "2026-06-17T04:19:54.507",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "vulnerable": true,
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              "versionEndExcluding": "8.1.22",
              "versionStartIncluding": "8.1.0"
            },
            {
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            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "psirt@paloaltonetworks.com"
}