GSD-2020-2050

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.
Aliases
Aliases
CVE-2020-2050
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{
  "GSD": {
    "alias": "CVE-2020-2050",
    "description": "An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.",
    "id": "GSD-2020-2050"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-2050"
      ],
      "details": "An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.",
      "id": "GSD-2020-2050",
      "modified": "2023-12-13T01:21:50.768190Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "psirt@paloaltonetworks.com",
        "DATE_PUBLIC": "2020-11-11T17:00:00.000Z",
        "ID": "CVE-2020-2050",
        "STATE": "PUBLIC",
        "TITLE": "PAN-OS: Authentication bypass vulnerability in GlobalProtect SSL VPN client certificate verification"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "PAN-OS",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "8.1",
                          "version_value": "8.1.17"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "9.0",
                          "version_value": "9.0.11"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "9.1",
                          "version_value": "9.1.5"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "10.0",
                          "version_value": "10.0.1"
                        },
                        {
                          "version_affected": "!\u003e=",
                          "version_name": "8.1",
                          "version_value": "8.1.17"
                        },
                        {
                          "version_affected": "!\u003e=",
                          "version_name": "9.0",
                          "version_value": "9.0.11"
                        },
                        {
                          "version_affected": "!\u003e=",
                          "version_name": "9.1",
                          "version_value": "9.1.5"
                        },
                        {
                          "version_affected": "!\u003e=",
                          "version_name": "10.0",
                          "version_value": "10.0.1"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Palo Alto Networks"
            }
          ]
        }
      },
      "configuration": [
        {
          "lang": "eng",
          "value": "This issue is only applicable to PAN-OS appliances using the GlobalProtect SSL VPN gateway or portal configured to allow users to authenticate with client certificate authentication.\n\nThis issue can not be exploited if client certificate authentication is not in use.\n\nOther forms of authentication are not impacted by this issue.\n"
        }
      ],
      "credit": [
        {
          "lang": "eng",
          "value": "This issue was found by Nicholas Newsom of Palo Alto Networks during internal security review."
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1."
          }
        ]
      },
      "exploit": [
        {
          "lang": "eng",
          "value": "Palo Alto Networks is not aware of any malicious exploitation of this issue."
        }
      ],
      "generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "impact": {
        "cvss": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-285 Improper Authorization"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://security.paloaltonetworks.com/CVE-2020-2050",
            "refsource": "MISC",
            "url": "https://security.paloaltonetworks.com/CVE-2020-2050"
          }
        ]
      },
      "solution": [
        {
          "lang": "eng",
          "value": "This issue is fixed in PAN-OS 8.1.17, PAN-OS 9.0.11, PAN-OS 9.1.5, PAN-OS 10.0.1, and all later PAN-OS versions."
        }
      ],
      "source": {
        "defect": [
          "PAN-146650"
        ],
        "discovery": "INTERNAL"
      },
      "timeline": [
        {
          "lang": "eng",
          "time": "2020-11-11T17:00:00.000Z",
          "value": "Initial publication"
        }
      ],
      "work_around": [
        {
          "lang": "eng",
          "value": "This issue can be mitigated by configuring GlobalProtect SSL VPN to require gateway and portal users to authenticate with their credentials. Other authentication methods are not impacted by this issue."
        }
      ],
      "x_advisoryEoL": false,
      "x_affectedList": [
        "PAN-OS 10.0.0",
        "PAN-OS 10.0",
        "PAN-OS 9.1.4",
        "PAN-OS 9.1.3-h1",
        "PAN-OS 9.1.3",
        "PAN-OS 9.1.2-h1",
        "PAN-OS 9.1.2",
        "PAN-OS 9.1.1",
        "PAN-OS 9.1.0-h3",
        "PAN-OS 9.1.0-h2",
        "PAN-OS 9.1.0-h1",
        "PAN-OS 9.1.0",
        "PAN-OS 9.1",
        "PAN-OS 9.0.10",
        "PAN-OS 9.0.9-h1",
        "PAN-OS 9.0.9",
        "PAN-OS 9.0.8",
        "PAN-OS 9.0.7",
        "PAN-OS 9.0.6",
        "PAN-OS 9.0.5",
        "PAN-OS 9.0.4",
        "PAN-OS 9.0.3-h3",
        "PAN-OS 9.0.3-h2",
        "PAN-OS 9.0.3-h1",
        "PAN-OS 9.0.3",
        "PAN-OS 9.0.2-h4",
        "PAN-OS 9.0.2-h3",
        "PAN-OS 9.0.2-h2",
        "PAN-OS 9.0.2-h1",
        "PAN-OS 9.0.2",
        "PAN-OS 9.0.1",
        "PAN-OS 9.0.0",
        "PAN-OS 9.0",
        "PAN-OS 8.1.16",
        "PAN-OS 8.1.15-h3",
        "PAN-OS 8.1.15-h2",
        "PAN-OS 8.1.15-h1",
        "PAN-OS 8.1.15",
        "PAN-OS 8.1.14-h2",
        "PAN-OS 8.1.14-h1",
        "PAN-OS 8.1.14",
        "PAN-OS 8.1.13",
        "PAN-OS 8.1.12",
        "PAN-OS 8.1.11",
        "PAN-OS 8.1.10",
        "PAN-OS 8.1.9-h4",
        "PAN-OS 8.1.9-h3",
        "PAN-OS 8.1.9-h2",
        "PAN-OS 8.1.9-h1",
        "PAN-OS 8.1.9",
        "PAN-OS 8.1.8-h5",
        "PAN-OS 8.1.8-h4",
        "PAN-OS 8.1.8-h3",
        "PAN-OS 8.1.8-h2",
        "PAN-OS 8.1.8-h1",
        "PAN-OS 8.1.8",
        "PAN-OS 8.1.7",
        "PAN-OS 8.1.6-h2",
        "PAN-OS 8.1.6-h1",
        "PAN-OS 8.1.6",
        "PAN-OS 8.1.5",
        "PAN-OS 8.1.4",
        "PAN-OS 8.1.3",
        "PAN-OS 8.1.2",
        "PAN-OS 8.1.1",
        "PAN-OS 8.1.0",
        "PAN-OS 8.1"
      ]
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "8.1.17",
                "versionStartIncluding": "8.1.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "9.0.11",
                "versionStartIncluding": "9.0.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "9.1.5",
                "versionStartIncluding": "9.1.0",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndExcluding": "10.0.1",
                "versionStartIncluding": "10.0.0",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "psirt@paloaltonetworks.com",
          "ID": "CVE-2020-2050"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17; PAN-OS 9.0 versions earlier than PAN-OS 9.0.11; PAN-OS 9.1 versions earlier than PAN-OS 9.1.5; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-287"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "N/A",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://security.paloaltonetworks.com/CVE-2020-2050"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 6.4,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 4.2
        }
      },
      "lastModifiedDate": "2020-11-24T18:19Z",
      "publishedDate": "2020-11-12T00:15Z"
    }
  }
}


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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.
  • 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.
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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.



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