fkie_cve-2020-2021
Vulnerability from fkie_nvd
Published
2020-06-29 15:15
Modified
2025-02-07 15:03
Severity ?
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Summary
When Security Assertion Markup Language (SAML) authentication is enabled and the 'Validate Identity Provider Certificate' option is disabled (unchecked), improper verification of signatures in PAN-OS SAML authentication enables an unauthenticated network-based attacker to access protected resources. The attacker must have network access to the vulnerable server to exploit this vulnerability. This issue affects PAN-OS 9.1 versions earlier than PAN-OS 9.1.3; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15, and all versions of PAN-OS 8.0 (EOL). This issue does not affect PAN-OS 7.1. This issue cannot be exploited if SAML is not used for authentication. This issue cannot be exploited if the 'Validate Identity Provider Certificate' option is enabled (checked) in the SAML Identity Provider Server Profile. Resources that can be protected by SAML-based single sign-on (SSO) authentication are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN, Authentication and Captive Portal, PAN-OS next-generation firewalls (PA-Series, VM-Series) and Panorama web interfaces, Prisma Access In the case of GlobalProtect Gateways, GlobalProtect Portal, Clientless VPN, Captive Portal, and Prisma Access, an unauthenticated attacker with network access to the affected servers can gain access to protected resources if allowed by configured authentication and Security policies. There is no impact on the integrity and availability of the gateway, portal or VPN server. An attacker cannot inspect or tamper with sessions of regular users. In the worst case, this is a critical severity vulnerability with a CVSS Base Score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N). In the case of PAN-OS and Panorama web interfaces, this issue allows an unauthenticated attacker with network access to the PAN-OS or Panorama web interfaces to log in as an administrator and perform administrative actions. In the worst-case scenario, this is a critical severity vulnerability with a CVSS Base Score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). If the web interfaces are only accessible to a restricted management network, then the issue is lowered to a CVSS Base Score of 9.6 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability.
References
psirt@paloaltonetworks.comhttps://security.paloaltonetworks.com/CVE-2020-2021Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.paloaltonetworks.com/CVE-2020-2021Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
paloaltonetworks pan-os *
paloaltonetworks pan-os *
paloaltonetworks pan-os *
paloaltonetworks pan-os *


To clipboard 

{
  "cisaActionDue": "2022-04-15",
  "cisaExploitAdd": "2022-03-25",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Palo Alto Networks PAN-OS Authentication Bypass Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2BEFBF38-AF84-4477-A6B9-5BDD51D54F4F",
              "versionEndIncluding": "8.0.20",
              "versionStartIncluding": "8.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6116C706-6AC7-476D-9624-C0D4BE3D497A",
              "versionEndExcluding": "8.1.15",
              "versionStartIncluding": "8.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6D6E8B99-4150-4AE8-A580-08AC71F64760",
              "versionEndExcluding": "9.0.9",
              "versionStartIncluding": "9.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E9F14E9-3CD7-443B-9D97-254E917FA22B",
              "versionEndExcluding": "9.1.3",
              "versionStartIncluding": "9.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "When Security Assertion Markup Language (SAML) authentication is enabled and the \u0027Validate Identity Provider Certificate\u0027 option is disabled (unchecked), improper verification of signatures in PAN-OS SAML authentication enables an unauthenticated network-based attacker to access protected resources. The attacker must have network access to the vulnerable server to exploit this vulnerability. This issue affects PAN-OS 9.1 versions earlier than PAN-OS 9.1.3; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15, and all versions of PAN-OS 8.0 (EOL). This issue does not affect PAN-OS 7.1. This issue cannot be exploited if SAML is not used for authentication. This issue cannot be exploited if the \u0027Validate Identity Provider Certificate\u0027 option is enabled (checked) in the SAML Identity Provider Server Profile. Resources that can be protected by SAML-based single sign-on (SSO) authentication are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN, Authentication and Captive Portal, PAN-OS next-generation firewalls (PA-Series, VM-Series) and Panorama web interfaces, Prisma Access In the case of GlobalProtect Gateways, GlobalProtect Portal, Clientless VPN, Captive Portal, and Prisma Access, an unauthenticated attacker with network access to the affected servers can gain access to protected resources if allowed by configured authentication and Security policies. There is no impact on the integrity and availability of the gateway, portal or VPN server. An attacker cannot inspect or tamper with sessions of regular users. In the worst case, this is a critical severity vulnerability with a CVSS Base Score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N). In the case of PAN-OS and Panorama web interfaces, this issue allows an unauthenticated attacker with network access to the PAN-OS or Panorama web interfaces to log in as an administrator and perform administrative actions. In the worst-case scenario, this is a critical severity vulnerability with a CVSS Base Score of 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). If the web interfaces are only accessible to a restricted management network, then the issue is lowered to a CVSS Base Score of 9.6 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability."
    },
    {
      "lang": "es",
      "value": "Cuando la autenticaci\u00f3n Security Assertion Markup Language (SAML) est\u00e1 habilitada y la opci\u00f3n \u201cValidate Identity Provider Certificate\u201d est\u00e1 deshabilitada (desmarcada), la verificaci\u00f3n inapropiada de firmas en la autenticaci\u00f3n SAML de PAN-OS permite a un atacante basado en la red no autenticado acceder a recursos protegidos. El atacante debe tener acceso de red al servidor vulnerable para explotar esta vulnerabilidad. Este problema afecta a PAN-OS versiones 9.1 anteriores a PAN-OS 9.1.3; PAN-OS versiones 9.0 anteriores a PAN-OS 9.0.9; PAN-OS versiones 8.1 anteriores a PAN-OS 8.1.15, y todas las versiones de PAN-OS 8.0 (EOL). Este problema no afecta a PAN-OS versi\u00f3n 7.1. Este problema no puede ser explotado si SAML no es usado para la autenticaci\u00f3n. Este problema no puede ser explotado si la opci\u00f3n \u201cValidate Identity Provider Certificate\u201d est\u00e1 habilitada (marcada) en el SAML Identity Provider Server Profile. Los recursos que pueden ser protegidos mediante la autenticaci\u00f3n de inicio de sesi\u00f3n \u00fanico basada en SAML (SSO) son: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN, Authentication y Captive Portal, los firewalls de PAN-OS  de pr\u00f3xima generaci\u00f3n (PA-Series, VM-Series) e interfaces web Panorama, Prisma Access en el caso de GlobalProtect Gateways, GlobalProtect Portal, Clientless VPN, Captive Portal y Prisma Access, un atacante no autenticado con acceso a la red para los servidores afectados puede conseguir acceso a recursos protegidos si es permitido por la autenticaci\u00f3n configurada y las pol\u00edticas de Seguridad. No hay impacto en la integridad y disponibilidad de la puerta de enlace, portal o servidor VPN. Un atacante no puede inspeccionar ni alterar las sesiones de los usuarios habituales. En el peor de los casos, esta es una vulnerabilidad de gravedad cr\u00edtica con una Puntuaci\u00f3n Base CVSS de 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N). En el caso de las interfaces web de PAN-OS y Panorama, este problema permite a un atacante no autenticado con acceso de red a las interfaces web de PAN-OS o Panorama iniciar sesi\u00f3n como administrador y llevar a cabo acciones administrativas. En el peor de los casos, esta es una vulnerabilidad de gravedad cr\u00edtica con un Puntaje Base CVSS de 10.0 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). Si las interfaces web solo son accesibles para una red de administraci\u00f3n restringida, entonces el problema se reduce a una Puntuaci\u00f3n Base CVSS de 9.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H). Palo Alto Networks no tiene conocimiento de ning\u00fan intento malicioso para explotar esta vulnerabilidad"
    }
  ],
  "id": "CVE-2020-2021",
  "lastModified": "2025-02-07T15:03:31.663",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 9.3,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.0,
        "source": "psirt@paloaltonetworks.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-06-29T15:15:12.733",
  "references": [
    {
      "source": "psirt@paloaltonetworks.com",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://security.paloaltonetworks.com/CVE-2020-2021"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://security.paloaltonetworks.com/CVE-2020-2021"
    }
  ],
  "sourceIdentifier": "psirt@paloaltonetworks.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "psirt@paloaltonetworks.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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