Vulnerability-Lookup

CNVD-2021-22168

Vulnerability from cnvd - Published: 2021-03-25

Title

Palo Alto Networks PAN-OS SSL VPN组件验证绕过漏洞

Description

Palo Alto Networks PAN-OS是一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS SSL VPN组件存在验证绕过漏洞，远程攻击者可利用该漏洞提交特殊的请求，可绕过基于证书限制的认证，未授权访问应用。

Severity

中

Patch Name

Palo Alto Networks PAN-OS SSL VPN组件验证绕过漏洞的补丁

Patch Description

Palo Alto Networks PAN-OS是一套为其防火墙设备开发的操作系统。 Palo Alto Networks PAN-OS SSL VPN组件存在验证绕过漏洞，远程攻击者可利用该漏洞提交特殊的请求，可绕过基于证书限制的认证，未授权访问应用。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://security.paloaltonetworks.com/CVE-2020-2050

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-2050

Impacted products

Name
['Palo Alto Networks PAN-OS >=8.1.0，<8.1.17', 'Palo Alto Networks PAN-OS >=9.0.0，<9.0.11', 'Palo Alto Networks PAN-OS >=9.1.0，<9.1.5', 'Palo Alto Networks PAN-OS >=10.0.0，<10.0.1']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-2050",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-2050"
    }
  },
  "description": "Palo Alto Networks PAN-OS\u662f\u4e00\u5957\u4e3a\u5176\u9632\u706b\u5899\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\n\nPalo Alto Networks PAN-OS SSL VPN\u7ec4\u4ef6\u5b58\u5728\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u4ea4\u7279\u6b8a\u7684\u8bf7\u6c42\uff0c\u53ef\u7ed5\u8fc7\u57fa\u4e8e\u8bc1\u4e66\u9650\u5236\u7684\u8ba4\u8bc1\uff0c\u672a\u6388\u6743\u8bbf\u95ee\u5e94\u7528\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a \r\nhttps://security.paloaltonetworks.com/CVE-2020-2050",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-22168",
  "openTime": "2021-03-25",
  "patchDescription": "Palo Alto Networks PAN-OS\u662f\u4e00\u5957\u4e3a\u5176\u9632\u706b\u5899\u8bbe\u5907\u5f00\u53d1\u7684\u64cd\u4f5c\u7cfb\u7edf\u3002\r\n\r\nPalo Alto Networks PAN-OS SSL VPN\u7ec4\u4ef6\u5b58\u5728\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u63d0\u4ea4\u7279\u6b8a\u7684\u8bf7\u6c42\uff0c\u53ef\u7ed5\u8fc7\u57fa\u4e8e\u8bc1\u4e66\u9650\u5236\u7684\u8ba4\u8bc1\uff0c\u672a\u6388\u6743\u8bbf\u95ee\u5e94\u7528\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Palo Alto Networks PAN-OS SSL VPN\u7ec4\u4ef6\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Palo Alto Networks PAN-OS \u003e=8.1.0\uff0c\u003c8.1.17",
      "Palo Alto Networks PAN-OS \u003e=9.0.0\uff0c\u003c9.0.11",
      "Palo Alto Networks PAN-OS \u003e=9.1.0\uff0c\u003c9.1.5",
      "Palo Alto Networks PAN-OS \u003e=10.0.0\uff0c\u003c10.0.1"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-2050",
  "serverity": "\u4e2d",
  "submitTime": "2020-11-16",
  "title": "Palo Alto Networks PAN-OS SSL VPN\u7ec4\u4ef6\u9a8c\u8bc1\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2020-2050 (GCVE-0-2020-2050)

Vulnerability from cvelistv5 – Published: 2020-11-12 00:05 – Updated: 2024-09-17 00:11

Title

PAN-OS: Authentication bypass vulnerability in GlobalProtect SSL VPN client certificate verification

Summary

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.

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CWE

CWE-285 - Improper Authorization

Assigner

palo_alto mitre root

References

1 reference

URL	Tags
https://security.paloaltonetworks.com/CVE-2020-2050	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Palo Alto Networks	PAN-OS	Affected: 8.1 , < 8.1.17 (custom) Affected: 9.0 , < 9.0.11 (custom) Affected: 9.1 , < 9.1.5 (custom) Affected: 10.0 , < 10.0.1 (custom)

Date Public

2020-11-11 00:00

Credits

This issue was found by Nicholas Newsom of Palo Alto Networks during internal security review.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T06:54:00.576Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://security.paloaltonetworks.com/CVE-2020-2050"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "PAN-OS",
          "vendor": "Palo Alto Networks",
          "versions": [
            {
              "changes": [
                {
                  "at": "8.1.17",
                  "status": "unaffected"
                }
              ],
              "lessThan": "8.1.17",
              "status": "affected",
              "version": "8.1",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "9.0.11",
                  "status": "unaffected"
                }
              ],
              "lessThan": "9.0.11",
              "status": "affected",
              "version": "9.0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "9.1.5",
                  "status": "unaffected"
                }
              ],
              "lessThan": "9.1.5",
              "status": "affected",
              "version": "9.1",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "10.0.1",
                  "status": "unaffected"
                }
              ],
              "lessThan": "10.0.1",
              "status": "affected",
              "version": "10.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "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."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "This issue was found by Nicholas Newsom of Palo Alto Networks during internal security review."
        }
      ],
      "datePublic": "2020-11-11T00:00:00.000Z",
      "descriptions": [
        {
          "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."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "Palo Alto Networks is not aware of any malicious exploitation of this issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-285",
              "description": "CWE-285 Improper Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-11-12T00:05:22.000Z",
        "orgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0",
        "shortName": "palo_alto"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security.paloaltonetworks.com/CVE-2020-2050"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "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": "en",
          "time": "2020-11-11T00:00:00.000Z",
          "value": "Initial publication"
        }
      ],
      "title": "PAN-OS: Authentication bypass vulnerability in GlobalProtect SSL VPN client certificate verification",
      "workarounds": [
        {
          "lang": "en",
          "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_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "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": "en",
            "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."
          }
        ],
        "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": "en",
            "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": "en",
            "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": "en",
            "time": "2020-11-11T00:00:00.000Z",
            "value": "Initial publication"
          }
        ],
        "work_around": [
          {
            "lang": "en",
            "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"
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0",
    "assignerShortName": "palo_alto",
    "cveId": "CVE-2020-2050",
    "datePublished": "2020-11-12T00:05:22.986Z",
    "dateReserved": "2019-12-04T00:00:00.000Z",
    "dateUpdated": "2024-09-17T00:11:04.982Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.