Tracking what is using a security group

Question

Hello,
I am still at trying to clean up AWS account, and am needing some advice.

In AWS - EC2 - Security Groups - I have several critical vulnerabilities there, and in lieu of just nixing the issues, as im SURE it will blow something up, how do I find what function(s) are using this security group.  So I can chase it back to its roots, see if they can be safely removed, or changed so the security value that is a vulnerability can be removed.
THANKS

Answer

Hello @BigD63

We answered your question in the latest episode of AWS Supports You. Please take a look at the YouTube video here, and we hope it helps answer your question! https://www.youtube.com/watch?v=lzadlmq4LcM

Please don't hesitate to comment here if you have any follow up questions. If this helped to answer your question, please make sure to mark this question as answered.

Have a great day!

Answer

Check out [this](https://aws.amazon.com/premiumsupport/knowledge-center/ec2-find-security-group-resources/) document. You can do it via the console as shown in the document or via the CLI:

```
aws ec2 describe-network-interfaces --filters Name=group-id,Values= --region  --output json
```
Hope this helps

Answer

This will definitely show you all the resources your security group is associate with `aws ec2 describe-network-interfaces --filters Name=group-id,Values= --region  --output json --query 'NetworkInterfaces'`

Answer

Hey,  does checking into network interfaces cover all cases? or there might be some cases further left and we end up deleting the wrong one. Couple of things on top of my head
1. What if a security group is referenced by another security group but not there in a network interface
2. What if security group is used by another account?

there might be other cases ,how can we make sure that these cases are also handled or am i just being too much paranoid?

Thanks

Tracking what is using a security group

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