使用 IAM 用户的访问密钥为第三方 AWS 账户代入角色失败

Question

我正在尝试使用具有 SecurityAudit 角色的 Assume Role function 授予第三方 AWS 账户对我的 AWS 账户的访问权限，类似于此处。 我按照这里的解释为第三方账户分配了名为 testing 的角色，我将在其中获得类似这样的信任关系（我还添加了第三方的 IAM 用户，因为它将使用他的访问密钥访问我的 AWS 账户） ：

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

然后我按照这里的代码如下：

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();

但是当第三方运行代码时，它会收到如下错误：

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账户想要使用他的访问密钥对我的账户进行安全审计，应该如何正确配置呢？

Answer 1

错误说

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

是不是能够承担利益的角色。

在您的问题中，您正确地允许arn:aws:iam::thirdparty:root担任该角色。 但这仍然没有授予TestOne IAM 用户执行相同操作的权限。

要解决此问题， thirdparty账户的管理员/根必须明确允许IAM 用户TestOne在您的账户中使用sts:AssumeRole 。

因此， thirdparty帐户可以将诸如内联策略之类的权限添加到例如TestOne用户。 显然，也可以使用客户管理的策略或其他 IAM 机制来完成。 但内联策略似乎是最快且最容易测试的。