[BUG] Amazon S3 Bucket - Put Object not authenticating

[lakomiak]

Type of Connector

Independent Publisher Connector

Name of Connector

Amazon S3 Bucket - Put Object

Describe the bug

I am trying to connect to an AWS S3 bucket in my VPC and have verified the credentials to be correct but the connector fails with a forbidden error as follows. I know as part of this connection this connector has to create a signature with the credentials encrypted in order to gain Authentication. I don't know what is actually getting passed to AWS in the end to know if there is an issue with the signature becuase the credentials are verified as working.

InvalidAccessKeyIdThe AWS Access Key Id you provided does not exist in our records.

Is this a security bug?

Yes, this is a security bug

What is the severity of this bug?

Severity 1 - Connector is broken or there's a very serious issue

To Reproduce

Define connection in the put object action and attempt to connect to AWS S3 bucket defined

Expected behavior

Connection established to S3 and file passed in the connector pushed to the S3 bucket defined.

Environment summary

PowerAutomate Cloud flow

Additional context

No other information is available but the error message.

[megel]

Hi @lakomiak,

you have described that your AWS S3 bucket is in your VPC. Is it possible, that you have blocked the public endpoints of S3 API?

Please try the connector with a standard S3 bucket that is public available to see, if the authentication works as expected.

[vmanoharas]

Hi @lakomiak

Please see the solution provided by @megel and close this bug, if your issue resolved.

[megel]

@lakomiak any updates?

[lakomiak]

This can be closed. Sorry for the delay. Allen

…

________________________________ From: Michael Megel ***@***.***> Sent: Tuesday, April 1, 2025 1:50:39 AM To: microsoft/PowerPlatformConnectors ***@***.***> Cc: Allen R. Lakomiak ***@***.***>; Mention ***@***.***> Subject: [External] Re: [microsoft/PowerPlatformConnectors] [BUG] Amazon S3 Bucket - Put Object not authenticating (Issue #3733) You don't often get email from ***@***.*** Learn why this is important<https://aka.ms/LearnAboutSenderIdentification> [CAUTION: External email. Do not click links or open attachments unless verified. If this email appears suspicious, please submit it using the SPAM/Phish Alert button in Outlook. @lakomiak<https://github.com/lakomiak> any updates? — Reply to this email directly, view it on GitHub<#3733 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A64F4LHOKZCRVTWXP5SCWDL2XISK7AVCNFSM6AAAAABTNRI5COVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDONRYGE3DONJTGU>. You are receiving this because you were mentioned.Message ID: ***@***.***> [megel]megel left a comment (microsoft/PowerPlatformConnectors#3733)<#3733 (comment)> @lakomiak<https://github.com/lakomiak> any updates? — Reply to this email directly, view it on GitHub<#3733 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A64F4LHOKZCRVTWXP5SCWDL2XISK7AVCNFSM6AAAAABTNRI5COVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDONRYGE3DONJTGU>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[vmanoharas]

Thank you @lakomiak for the confirmation.

Thank you @megel for your help, I am closing this Bug.