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# AWS S3 buckets do not have server side encryption misconfiguration detected in code

## Rule Details

|                        |                                                       |
| ---------------------- | ----------------------------------------------------- |
| Cortex AppSec Rule ID  | APPSEC\_AWS\_19                                       |
| Category - Subcategory | Storage - Encryption                                  |
| Provider               | AWS                                                   |
| Severity               | LOW                                                   |
| Framework              | CloudFormation, Serverless, Terraform, Terraform Plan |
| Mapped CSPM/KSPM Rule  | d0658e3d-4d59-4333-b80c-b90e2e28dbaa                  |

## Impact

SSE helps prevent unauthorized access to S3 buckets. Encrypting and decrypting data at the S3 bucket level is transparent to users when accessing data.

## How to Fix

*Resource:* aws\_s3\_bucket, aws\_s3\_bucket\_server\_side\_encryption\_configuration

Ensure that the bucket is encrypted using either AES256 or a KMS key

*CloudFormation*

* *Resource:* AWS::S3::Bucket
* *Arguments:* Properites.BucketEncryption \[source,go]

***

resource "aws\_s3\_bucket\_server\_side\_encryption\_configuration" "example" {

* bucket = aws\_s3\_bucket.example.bucket
*
* rule {
* apply\_server\_side\_encryption\_by\_default {
* kms\_master\_key\_id = aws\_kms\_key.mykey.arn
* sse\_algorithm = "AES256"
* }
* }
* }

***

Type: AWS::S3::Bucket Properties: ...

* BucketEncryption:
* ServerSideEncryptionConfiguration:
* * ServerSideEncryptionByDefault:
* SSEAlgorithm: AES256

***


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