Adaptive MFA のログイベント

Auth0 で Adaptive Multi-Factor Authentication (MFA) のアクティビティを記録するテナントログイベントについて説明します。

テナントログには、成功したログインイベントと失敗したログインイベントのエントリがあり、Adaptive MFA のリスク評価スコアに関する情報も含まれます。これらは、ルールのコンテキストオブジェクトで使用できるエントリと同じです。Adaptive MFA のエントリは、次の構造になっています。

{
  "date": "2020-06-26T15:12:43.654Z",
  "type": "s",
  "details": {
    "riskAssessment": {
      "confidence": "high",
      "assessments": {
        "UntrustedIP": {
          "confidence": "high",
          "code": "not_found_on_deny_list"
    	},
    	"NewDevice": {
      	  "confidence": "medium",
      	  "code": "partial_match",
          "details": {
            "device": "unknown",
            "useragent": "known",
          }
    	},
    	"ImpossibleTravel": {
      	  "confidence": "high",
      	  "code": "minimal_travel_from_last_login"
    	}
      }
    }
  },
  "description": "Successful login"
}

以下は例です。

{
  "date": "2020-06-24T20:24:39.412Z",
  "type": "s",
  "description": "Successful login",
  "connection": "Username-Password-Authentication",
  "connection_id": "con_16Tpc6YqlWZ4HCut",
  "client_id": "9ZteveEZ8CqSLtCNXgvhoCJQ0jt2xSxe",
  "client_name": "jwt.io",
  "ip": "10.12.13.1",
  "client_ip": null,
  "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0",
  "details": {
    "prompts": [
      {
        "name": "prompt-authenticate",
        "initiatedAt": null,
        "completedAt": 1593030278513,
        "connection": "Username-Password-Authentication",
        "connection_id": null,
        "strategy": "auth0",
        "identity": "5ee10b1ca85332004e44ce3e",
        "stats": {
          "loginsCount": 66
        },
        "elapsedTime": null
      },
      {
        "name": "login",
        "flow": "universal-login",
        "initiatedAt": 1593030268561,
        "completedAt": 1593030278558,
        "timers": {
          "rules": 336
        },
        "user_id": "auth0|5ee10b1ca85332004e44ce3e",
        "user_name": "[e-mail]",
        "elapsedTime": 9997
      }
    ],
    "initiatedAt": 1593030268550,
    "completedAt": 1593030279374,
    "elapsedTime": 10824,
    "session_id": "dKvR03IjVSNLPaVLqVS-FBuX87z0bBoE",
    "riskAssessment": {
      "confidence": "medium",
      "assessments": {
        "UntrustedIP": {
          "confidence": "high",
          "code": "ip_not_found"
        },
        "NewDevice": {
          "confidence": "medium",
          "code": "match_useragent",
          "details": {
            "device": "unknown",
            "useragent": "known",
          }
        },
        "ImpossibleTravel": {
          "confidence": "low",
          "code": "missing_geoip"
        }
      }
    },
    "stats": {
      "loginsCount": 66
    }
  },
  "hostname": "josh.local.dev.auth0.com",
  "user_id": "auth0|5ee10b1ca85332004e44ce3e",
  "user_name": "[e-mail]",
  "strategy": "auth0",
  "strategy_type": "database"
}

​

攻撃対策の詳細

Auth0 は、ルールの実行情報に加えて、Adaptive MFA の 攻撃対策 情報もテナントログに含めます。ルールに表示されるものと同じデータ構造が、テナントログにも表示されます:

{
  "date": "2020-06-26T15:12:43.654Z",
  "type": "s",
  "details": {
	"anomalyDetection": {
  	  "confidence": "high",
  	  "assessments": {
    	    "UntrustedIP": {
      	    "confidence": "high",
      	    "reason": "ip not found",
      	    "code": "ip_not_found"
    	    },
    	    "NewDevice": {
      	    "confidence": "medium",
      	    "reason": "match useragent",
      	    "code": "match_useragent"
    	    },
    	    "ImpossibleTravel": {
      	    "confidence": "high",
      	    "reason": "minimal travel",
      	    "code": "minimal_travel_from_last_login"
    	    }
  	  }
	},
  },
  "description": "Successful login"
}

​

MFAプロンプトの詳細

Adaptive MFA が有効な場合、初回のログイン試行の信頼度スコアが低いと、ユーザーは MFA の登録を求められます。ログインイベントの詳細に、mfa プロンプトが表示されることがあります。例:

{
  "_id": "5ef3bb0a72487a0047c32959",
  "date": "2020-06-24T20:43:54.159Z",
  "type": "s",
  "description": "Successful login",
  "connection": "Username-Password-Authentication",
  "connection_id": "con_16Tpc6YqlWZ4HCut",
  "client_id": "9ZteveEZ8CqSLtCNXgvhoCJQ0jt2xSxe",
  "client_name": "jwt.io",
  "ip": "10.12.13.1",
  "client_ip": null,
  "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0",
  "details": {
    "prompts": [
      {
        "name": "prompt-authenticate",
        "completedAt": 1593031413909,
        "connection": "Username-Password-Authentication",
        "strategy": "auth0",
        "identity": "5ee10b1ca85332004e44ce3e",
        "stats": {
          "loginsCount": 67
        },
        "elapsedTime": null
      },
      {
        "name": "login",
        "flow": "universal-login",
        "initiatedAt": 1593031371948,
        "completedAt": 1593031413953,
        "timers": {
          "rules": 443
        },
        "user_id": "auth0|5ee10b1ca85332004e44ce3e",
        "user_name": "[e-mail]",
        "elapsedTime": 42005
      },
      {
        "name": "mfa",
        "flow": "universal-mfa",
        "initiatedAt": 1593031414863,
        "completedAt": 1593031433795,
        "performed_acr": [
          "http://schemas.openid.net/pape/policies/2007/06/multi-factor"
        ],
        "performed_amr": [
          "mfa"
        ],
        "provider": "guardian",
        "elapsedTime": 18932
      }
    ],
    "initiatedAt": 1593031371938,
    "completedAt": 1593031434151,
    "elapsedTime": 62213,
    "session_id": "ulYRdsS1F4wIKLpUfQDfhyXgKVJqJaEv",
    "riskAssessment": {
      "confidence": "medium",
      "assessments": {
        "UntrustedIP": {
          "confidence": "high",
          "code": "ip_not_found"
        },
        "NewDevice": {
          "confidence": "medium",
          "code": "match_useragent",
          "details": {
            "device": "unknown",
            "useragent": "known",
          }
        },
        "ImpossibleTravel": {
          "confidence": "low",
          "code": "missing_geoip"
        }
      }
    },
    "stats": {
      "loginsCount": 67
    }
  },
  "hostname": "josh.local.dev.auth0.com",
  "user_id": "auth0|5ee10b1ca85332004e44ce3e",
  "user_name": "[e-mail]",
  "strategy": "auth0",
  "strategy_type": "database"
}

​

MFAプロバイダーの詳細

一部のMFAプロバイダーでは、イベントが表示されることがあります。以下は、OTP Auth Succeeded イベントを含む例です。

{
  "_id": "5ef3bb0922b43d004844af00",
  "date": "2020-06-24T20:43:53.758Z",
  "type": "gd_auth_succeed",
  "description": "Guardian - Second factor authentication succeed (totp)",
  "ip": "10.12.13.1",
  "user_agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0",
  "details": {
    "request": {
      "method": "POST",
      "path": "/api/totp/configs/josh/authenticators/totp%7Cdev_3KQv6yQ06pLoksIe/verify",
      "query": {},
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0",
      "body": {
        "code": "********"
      },
      "ip": "10.12.13.1",
      "auth": {
        "subject": null,
        "strategy": "jwt_api2_internal_token",
        "scopes": [
          "read:authenticators",
          "verify:authenticator"
        ]
      }
    },
    "response": {
      "body": {},
      "statusCode": null
    },
    "authenticator": {
      "id": "totp|dev_3KQv6yQ06pLoksIe",
      "type": "totp"
    },
    "device_id": "v0:45e50ea0-b65b-11ea-9dd7-27e2c7f14291"
  },
  "user_id": "auth0|5ee10b1ca85332004e44ce3e"
}

​

詳細はこちら

• Adaptive MFA のカスタマイズ