The last few months, thousands of s3 buckets have been discovered as public buckets. A total of 10% of AWS s3 buckets are public-configured buckets. We know it can be a lot of work to manually check every bucket. That’s why we are going to explain to you how to analyze every bucket easily and automatically in a few minutes to avoid a potentially dangerous data exposure.

S3 ACL Viewer

S3 ACL Viewer is a tool available here, allowing you to analyze your buckets. A�

Configuration of AWS IAM

The tool needs access to your AWS account.

– Go to AWS IAM

– Click on Users on the left-side menu

– Click onA�Add user Add your AWS IAM user in order to analyze your AWS S3 bucket – Choose a username and checkA�Programmatic access programmatic access – Click onA�Next: Permissions

– Click onA�Attach existing policies directly

– CheckA�AmazonS3ReadOnlyAccess attach existing directly – Click onA�Next: Review

– Click onA�Create user

– Copy the credentialsA�Access key ID andA�Secret access key

– Create ~/.aws/credentials file and put the credentials you copied here in this format:

aws_access_key_id = <your access key ID goes here>
aws_secret_access_key = <your secret_access_key goes here>

Use Existing Configured IAM User

Use your existing credentials or profile if you have a file ~/.aws/credentials like this:

aws_access_key_id = <your access key ID goes here>
aws_secret_access_key = <your secret_access_key goes here>
aws_access_key_id = <your access key ID goes here>
aws_secret_access_key = <your secret_access_key goes here>

And pass the profile name in argument (default if nothing):


gt; ./s3-acl-viewer -p my_profile_name

(Optional) Configure the Google Spreadsheet Report

If you want to generate a report on Google Spreadsheet, follow the first step of the instructions to setup credentials and API access. A�


Clone the repository by typing:


gt; git clone


gt; cd s3-acl-viewer



gt; ./s3-acl-viewer -h
usage: s3-acl-viewer [-h] [–auth_host_name AUTH_HOST_NAME]
[–auth_host_port [AUTH_HOST_PORT [AUTH_HOST_PORT …]]]
[-p [PROFILE [PROFILE …]]] [-n NAME] [-g] [-x] [-c] [-s]

optional arguments:
-h, –help show this help message and exit
–auth_host_name AUTH_HOST_NAME
Hostname when running a local web server.
Do not run a local web server.
–auth_host_port [AUTH_HOST_PORT [AUTH_HOST_PORT …]]
Port web server should listen on.
Set the logging level of detail.
-p [PROFILE [PROFILE …]], –profile [PROFILE [PROFILE …]]
aws profiles. [default] by default.
-n NAME, –name NAME spreadsheet name. [s3_report] by default.
-g, –gspread create a google spreadsheet.
-x, –xlsx create a xlsx spreadsheet.
-c, –csv create a csv file.
-s, –silent disable printing.
Note:A�Arguments –auth_host_name, -noauth_local_webserver, –auth_host_port and –loging_level are generated by the Google Spreadsheet implementation. A�

Generate a Report

If you want to generate a report in CSV, XLSX and Google Spreadsheet and if you want to print that report, type:

./s3-acl-viewer -gxc -p my_profile_1 my_profile_2

-g meansA�Upload the report on my Google Drive in the Google Spreadsheet format. You need to configure the API as explained above.

-x meansA�Create a .xlsx file (Microsoft Excel).

-c meansA�Create a standard .csv file.

-p my_profile_1 my_profile_2 meansA�Generate the report by analyzing that account.

The command will produce print report as standard output, gspread report with the Google Spreadsheet flag, xlsx report with the Microsoft Excel flag, and csv report with the CSV flag.

About TrackIt

TrackIt, an Amazon Web Services Advanced Consulting Partner based in Marina del Rey, CA, offers a range of cloud management, consulting, and software development solutions. Their expertise includes Modern Software Development, DevOps, Infrastructure-As-Code, Serverless, CI/CD, and Containerization, with a focus on Media & Entertainment workflows, High-Performance Computing environments, and data storage.

TrackIt excels in cutting-edge software design, particularly in the areas of containerization, serverless architectures, and pipeline development. The company’s team of experts can help you design and deploy a custom solution tailored to your specific needs.

In addition to cloud management and modern software development services, TrackIt also provides an open-source AWS cost management tool to help users optimize their costs and resources on the platform. With its innovative approach and expertise, TrackIt is the ideal partner for organizations seeking to maximize the potential of their cloud infrastructure.