使用 IAM 用戶的訪問密鑰為第三方 AWS 賬戶代入角色失敗

Question

我正在嘗試使用具有 SecurityAudit 角色的 Assume Role function 授予第三方 AWS 賬戶對我的 AWS 賬戶的訪問權限，類似於此處。 我按照這里的解釋為第三方賬戶分配了名為 testing 的角色，我將在其中獲得類似這樣的信任關系（我還添加了第三方的 IAM 用戶，因為它將使用他的訪問密鑰訪問我的 AWS 賬戶） ：

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "AWS": "arn:aws:iam::thirdparty:root"
      },
      "Action": "sts:AssumeRole",
      "Condition": {}
    }
  ]
}

然后我按照這里的代碼如下：

AWSSecurityTokenService stsClient = AWSSecurityTokenServiceClientBuilder.standard()
                                                    .withCredentials(new ProfileCredentialsProvider())
                                                    .withRegion(clientRegion)
                                                    .build();

            // Obtain credentials for the IAM role. Note that you cannot assume the role of an AWS root account;
            // Amazon S3 will deny access. You must use credentials for an IAM user or an IAM role.
            AssumeRoleRequest roleRequest = new AssumeRoleRequest()
                                                    .withRoleArn(roleARN)
                                                    .withRoleSessionName(roleSessionName);
            AssumeRoleResult roleResponse = stsClient.assumeRole(roleRequest);
            Credentials sessionCredentials = roleResponse.getCredentials();

但是當第三方運行代碼時，它會收到如下錯誤：

Exception in thread "main" com.amazonaws.services.securitytoken.model.AWSSecurityTokenServiceException: User: arn:aws:iam::thirdparty:user/TestOne is not authorized to perform: sts:AssumeRole on resource: arn:aws:iam::myaccount:role/testing(Service: AWSSecurityTokenService; Status Code: 403; Error Code: AccessDenied)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1632)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1304)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1058)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:743)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:717)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:699)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:667)
    at com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:649)
    at com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:513)
    at com.amazonaws.services.securitytoken.AWSSecurityTokenServiceClient.doInvoke(AWSSecurityTokenServiceClient.java:1307)
    at com.amazonaws.services.securitytoken.AWSSecurityTokenServiceClient.invoke(AWSSecurityTokenServiceClient.java:1283)
    at com.amazonaws.services.securitytoken.AWSSecurityTokenServiceClient.executeAssumeRole(AWSSecurityTokenServiceClient.java:466)
    at com.amazonaws.services.securitytoken.AWSSecurityTokenServiceClient.assumeRole(AWSSecurityTokenServiceClient.java:442)

那么如果第三方AWS賬戶想要使用他的訪問密鑰對我的賬戶進行安全審計，應該如何正確配置呢？

Answer 1

錯誤說

arn:aws:iam::thirdparty:user/TestOne

是不是能夠承擔利益的角色。

在您的問題中，您正確地允許arn:aws:iam::thirdparty:root擔任該角色。 但這仍然沒有授予TestOne IAM 用戶執行相同操作的權限。

要解決此問題， thirdparty賬戶的管理員/根必須明確允許IAM 用戶TestOne在您的賬戶中使用sts:AssumeRole 。

因此， thirdparty帳戶可以將諸如內聯策略之類的權限添加到例如TestOne用戶。 顯然，也可以使用客戶管理的策略或其他 IAM 機制來完成。 但內聯策略似乎是最快且最容易測試的。