S3 allows authenticated write acp remediation

Using Console

Using CLI

To remediate the misconfiguration “S3 Bucket Should Not Allow WRITE_ACP Access to Authenticated Users” for AWS using AWS CLI, follow these steps:

Open the AWS CLI on your local machine.
Run the following command to get a list of all S3 buckets in your AWS account:
```
aws s3api list-buckets
```
Identify the S3 bucket that has WRITE_ACP access granted to authenticated users.
Run the following command to revoke WRITE_ACP access for authenticated users:
```
aws s3api put-bucket-acl --bucket bucket-name --grant-write-acp uri=http://acs.amazonaws.com/groups/global/AuthenticatedUsers --acl private
```
Replace “bucket-name” with the name of the S3 bucket that you want to remediate.
Verify that WRITE_ACP access for authenticated users has been revoked by running the following command:
```
aws s3api get-bucket-acl --bucket bucket-name
```
Replace “bucket-name” with the name of the S3 bucket that you want to remediate.
Repeat the above steps for all S3 buckets that have WRITE_ACP access granted to authenticated users.

By following these steps, you can remediate the misconfiguration “S3 Bucket Should Not Allow WRITE_ACP Access to Authenticated Users” for AWS using AWS CLI.

Using Python

To remediate the misconfiguration of allowing WRITE_ACP access to authenticated users in an AWS S3 bucket using Python, follow these steps:

Create an AWS S3 client using the AWS SDK for Python (Boto3).
Get the bucket policy using the get_bucket_policy() method of the S3 client.
Parse the JSON policy to identify the statement that allows WRITE_ACP access to authenticated users.
Remove the identified statement from the policy.
Update the bucket policy using the put_bucket_policy() method of the S3 client.

Here’s the Python code to remediate the misconfiguration:

import boto3
import json

# Create an S3 client
s3 = boto3.client('s3')

# Get the bucket policy
bucket_name = 'your-bucket-name'
policy = s3.get_bucket_policy(Bucket=bucket_name)

# Parse the JSON policy
policy_json = json.loads(policy['Policy'])
statements = policy_json['Statement']

# Identify the statement that allows WRITE_ACP access to authenticated users
for statement in statements:
    if 'Principal' in statement and statement['Principal'] == {'AWS': '*'}:
        if 'Action' in statement and 's3:PutObjectAcl' in statement['Action']:
            if 'Condition' in statement and 'Bool' in statement['Condition']:
                if 'aws:SecureTransport' in statement['Condition']['Bool'] and statement['Condition']['Bool']['aws:SecureTransport'] == 'false':
                    # Remove the identified statement from the policy
                    policy_json['Statement'].remove(statement)

# Update the bucket policy
s3.put_bucket_policy(Bucket=bucket_name, Policy=json.dumps(policy_json))

This code will remove the statement that allows WRITE_ACP access to authenticated users from the S3 bucket policy.

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S3 allows authenticated write acp remediation

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