Serverless Function Without Dead Letter Queue

• Query id: cb2f612b-ed42-4ff5-9fb9-255c73d39a18
• Query name: Serverless Function Without Dead Letter Queue
• Platform: CloudFormation
• Severity: Low
• Category: Insecure Configurations
• URL: Github

Description

AWS Serverless Function should be configured for a Dead Letter Queue(DLQ)
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - yaml file

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: AWS SAM template with a simple API definition
Resources:
  Function:
    Type: AWS::Serverless::Function
    Properties:
      PackageType: Image
      ImageUri: account-id.dkr.ecr.region.amazonaws.com/ecr-repo-name:image-name
      ImageConfig:
        Command:
          - "app.lambda_handler"
        EntryPoint:
          - "entrypoint1"
        WorkingDirectory: "workDir"
      Tags:
        - Key: Type
          Value: AWS Serverless Function

Code samples without security vulnerabilities

Negative test num. 1 - yaml file

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: AWS SAM template with a simple API definition
Resources:
  Function1:
    Type: AWS::Serverless::Function
    Properties:
      PackageType: Image
      ImageUri: account-id.dkr.ecr.region.amazonaws.com/ecr-repo-name:image-name
      ImageConfig:
        Command:
          - "app.lambda_handler"
        EntryPoint:
          - "entrypoint1"
        WorkingDirectory: "workDir"
      Tags:
        - Key: Type
          Value: AWS Serverless Function
      DeadLetterConfig:
        TargetArn: arn:aws:sqs:us-east-1:2324243535:aaa
        Type: SQS