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[ aws . accessanalyzer ]

check-no-new-access

Description

Checks whether new access is allowed for an updated policy when compared to the existing policy.

You can find examples for reference policies and learn how to set up and run a custom policy check for new access in the IAM Access Analyzer custom policy checks samples repository on GitHub. The reference policies in this repository are meant to be passed to the existingPolicyDocument request parameter.

See also: AWS API Documentation

Synopsis

  check-no-new-access
--new-policy-document <value>
--existing-policy-document <value>
--policy-type <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]

Options

--new-policy-document (string)

The JSON policy document to use as the content for the updated policy.

--existing-policy-document (string)

The JSON policy document to use as the content for the existing policy.

--policy-type (string)

The type of policy to compare. Identity policies grant permissions to IAM principals. Identity policies include managed and inline policies for IAM roles, users, and groups.

Resource policies grant permissions on Amazon Web Services resources. Resource policies include trust policies for IAM roles and bucket policies for Amazon S3 buckets. You can provide a generic input such as identity policy or resource policy or a specific input such as managed policy or Amazon S3 bucket policy.

Possible values:

• IDENTITY_POLICY
• RESOURCE_POLICY

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

Global Options

--debug (boolean)

Turn on debug logging.

--endpoint-url (string)

Override command's default URL with the given URL.

--no-verify-ssl (boolean)

By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.

--no-paginate (boolean)

Disable automatic pagination. If automatic pagination is disabled, the AWS CLI will only make one call, for the first page of results.

--output (string)

The formatting style for command output.

• json
• text
• table

--query (string)

A JMESPath query to use in filtering the response data.

--profile (string)

Use a specific profile from your credential file.

--region (string)

The region to use. Overrides config/env settings.

--version (string)

Display the version of this tool.

--color (string)

Turn on/off color output.

• on
• off
• auto

--no-sign-request (boolean)

Do not sign requests. Credentials will not be loaded if this argument is provided.

--ca-bundle (string)

The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.

--cli-read-timeout (int)

The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.

--cli-connect-timeout (int)

The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.

Examples

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal's quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To check whether new access is allowed for an updated policy when compared to the existing policy

The following check-no-new-access example checks whether new access is allowed for an updated policy when compared to the existing policy.

aws accessanalyzer check-no-new-access \
    --existing-policy-document file://existing-policy.json \
    --new-policy-document file://new-policy.json \
    --policy-type IDENTITY_POLICY

Contents of existing-policy.json:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::amzn-s3-demo-bucket",
                "arn:aws:s3:::amzn-s3-demo-bucket/*"
            ]
        }
    ]
}

Contents of new-policy.json:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:GetObjectAcl",
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::amzn-s3-demo-bucket",
                "arn:aws:s3:::amzn-s3-demo-bucket/*"
            ]
        }
    ]
}

Output:

{
    "result": "FAIL",
    "message": "The modified permissions grant new access compared to your existing policy.",
    "reasons": [
        {
            "description": "New access in the statement with index: 0.",
            "statementIndex": 0
        }
    ]
}

For more information, see Previewing access with IAM Access Analyzer APIs in the AWS IAM User Guide.

Output

result -> (string)

The result of the check for new access. If the result is PASS , no new access is allowed by the updated policy. If the result is FAIL , the updated policy might allow new access.

message -> (string)

The message indicating whether the updated policy allows new access.

reasons -> (list)

A description of the reasoning of the result.

(structure)

Contains information about the reasoning why a check for access passed or failed.

description -> (string)

A description of the reasoning of a result of checking for access.

statementIndex -> (integer)

The index number of the reason statement.

statementId -> (string)

The identifier for the reason statement.