GSD-2020-15240

Vulnerability from gsd - Updated: 2020-11-03 00:00
Details
### Overview Versions after and including `2.3.0` are improperly validating the JWT token signature when using the `JWTValidator.verify` method. Improper validation of the JWT token signature when not using the default Authorization Code Flow can allow an attacker to bypass authentication and authorization. ### Am I affected? You are affected by this vulnerability if all of the following conditions apply: - You are using `omniauth-auth0`. - You are using `JWTValidator.verify` method directly OR you are not authenticating using the SDK’s default Authorization Code Flow. ### How to fix that? Upgrade to version `2.4.1`. ### Will this update impact my users? The fix provided in this version will not affect your users.
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Aliases
CVE-2020-15240
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{
  "GSD": {
    "alias": "CVE-2020-15240",
    "description": "omniauth-auth0 (rubygems) versions \u003e= 2.3.0 and \u003c 2.4.1 improperly validate the JWT token signature when using the `jwt_validator.verify` method. Improper validation of the JWT token signature can allow an attacker to bypass authentication and authorization. You are affected by this vulnerability if all of the following conditions apply: 1. You are using `omniauth-auth0`. 2. You are using `JWTValidator.verify` method directly OR you are not authenticating using the SDK\u2019s default Authorization Code Flow. The issue is patched in version 2.4.1.",
    "id": "GSD-2020-15240"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "affected": [
        {
          "package": {
            "ecosystem": "RubyGems",
            "name": "omniauth-auth0",
            "purl": "pkg:gem/omniauth-auth0"
          }
        }
      ],
      "aliases": [
        "CVE-2020-15240",
        "GHSA-58r4-h6v8-jcvm"
      ],
      "details": "### Overview\nVersions after and including `2.3.0` are improperly validating the JWT token signature when\nusing the `JWTValidator.verify` method.  Improper validation of the JWT token signature when\nnot using the default Authorization Code Flow can allow an attacker to bypass authentication\nand authorization.\n\n### Am I affected?\nYou are affected by this vulnerability if all of the following conditions apply:\n\n- You are using `omniauth-auth0`.\n- You are using `JWTValidator.verify` method directly OR you are not authenticating using the\n  SDK\u2019s default Authorization Code Flow.\n\n### How to fix that?\nUpgrade to version `2.4.1`.\n\n### Will this update impact my users?\nThe fix provided in this version will not affect your users.",
      "id": "GSD-2020-15240",
      "modified": "2020-11-03T00:00:00.000Z",
      "published": "2020-11-03T00:00:00.000Z",
      "references": [
        {
          "type": "WEB",
          "url": "https://github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvm"
        }
      ],
      "schema_version": "1.4.0",
      "severity": [
        {
          "score": 7.4,
          "type": "CVSS_V3"
        }
      ],
      "summary": "Regression in JWT Signature Validation"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "security-advisories@github.com",
        "ID": "CVE-2020-15240",
        "STATE": "PUBLIC",
        "TITLE": "Regression in JWT Signature Validation"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
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                  {
                    "product_name": "omniauth-auth0",
                    "version": {
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                          "version_value": "\u003e= 2.3.0, \u003c2.4.1"
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      "description": {
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            "value": "omniauth-auth0 (rubygems) versions \u003e= 2.3.0 and \u003c 2.4.1 improperly validate the JWT token signature when using the `jwt_validator.verify` method. Improper validation of the JWT token signature can allow an attacker to bypass authentication and authorization. You are affected by this vulnerability if all of the following conditions apply: 1. You are using `omniauth-auth0`. 2. You are using `JWTValidator.verify` method directly OR you are not authenticating using the SDK\u2019s default Authorization Code Flow. The issue is patched in version 2.4.1."
          }
        ]
      },
      "impact": {
        "cvss": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-287 Improper Authentication"
              }
            ]
          },
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-347 Improper Verification of Cryptographic Signature"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvm",
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            "url": "https://github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvm"
          },
          {
            "name": "https://github.com/auth0/omniauth-auth0/commit/fd3a14f4ccdfbc515d1121d6378ff88bf55a7a7a",
            "refsource": "MISC",
            "url": "https://github.com/auth0/omniauth-auth0/commit/fd3a14f4ccdfbc515d1121d6378ff88bf55a7a7a"
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          {
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            "refsource": "MISC",
            "url": "https://rubygems.org/gems/omniauth-auth0"
          }
        ]
      },
      "source": {
        "advisory": "GHSA-58r4-h6v8-jcvm",
        "discovery": "UNKNOWN"
      }
    },
    "github.com/rubysec/ruby-advisory-db": {
      "cve": "2020-15240",
      "cvss_v3": 7.4,
      "date": "2020-11-03",
      "description": "### Overview\nVersions after and including `2.3.0` are improperly validating the JWT token signature when\nusing the `JWTValidator.verify` method.  Improper validation of the JWT token signature when\nnot using the default Authorization Code Flow can allow an attacker to bypass authentication\nand authorization.\n\n### Am I affected?\nYou are affected by this vulnerability if all of the following conditions apply:\n\n- You are using `omniauth-auth0`.\n- You are using `JWTValidator.verify` method directly OR you are not authenticating using the\n  SDK\u2019s default Authorization Code Flow.\n\n### How to fix that?\nUpgrade to version `2.4.1`.\n\n### Will this update impact my users?\nThe fix provided in this version will not affect your users.",
      "gem": "omniauth-auth0",
      "ghsa": "58r4-h6v8-jcvm",
      "patched_versions": [
        "\u003e= 2.4.1"
      ],
      "title": "Regression in JWT Signature Validation",
      "unaffected_versions": [
        "\u003c 2.3.0"
      ],
      "url": "https://github.com/auth0/omniauth-auth0/security/advisories/GHSA-58r4-h6v8-jcvm"
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=2.3.0 \u003c2.4.1",
          "affected_versions": "All versions starting from 2.3.0 before 2.4.1",
          "cvss_v2": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "cwe_ids": [
            "CWE-1035",
            "CWE-347",
            "CWE-937"
          ],
          "date": "2021-11-18",
          "description": "omniauth-auth0 improperly validates the JWT token signature when using the `jwt_validator.verify` method. Improper validation of the JWT token signature can allow an attacker to bypass authentication and authorization. Impact is limited to the cases where you are using `omniauth-auth0` and using the `JWTValidator.verify` method directly, or you are not authenticating using the SDK\u2019s default `Authorization Code Flow`.",
          "fixed_versions": [
            "2.4.1"
          ],
          "identifier": "CVE-2020-15240",
          "identifiers": [
            "CVE-2020-15240",
            "GHSA-58r4-h6v8-jcvm"
          ],
          "not_impacted": "All versions before 2.3.0, all versions starting from 2.4.1",
          "package_slug": "gem/omniauth-auth0",
          "pubdate": "2020-10-21",
          "solution": "Upgrade to version 2.4.1 or above.",
          "title": "Improper Verification of Cryptographic Signature",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-15240",
            "https://rubygems.org/gems/omniauth-auth0"
          ],
          "uuid": "59d40b4b-fcc3-4674-919c-5b6969e2518f"
        }
      ]
    },
    "nvd.nist.gov": {
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                "versionEndExcluding": "2.4.1",
                "versionStartIncluding": "2.3.0",
                "vulnerable": true
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            }
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              "name": "https://rubygems.org/gems/omniauth-auth0",
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      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 8.6,
          "impactScore": 4.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
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          "impactScore": 5.2
        }
      },
      "lastModifiedDate": "2021-11-18T16:21Z",
      "publishedDate": "2020-10-21T18:15Z"
    }
  }
}



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