ec2-unrestricted-pgsql: Unrestricted PostgreSQL Access

id: ec2-unrestricted-pgsql
info:
  name: Unrestricted PostgreSQL Access
  author: princechaddha
  severity: critical
  description: |
    Identifies unrestricted inbound access to PostgreSQL databases in Amazon EC2 security groups, which can expose databases to security risks.
  impact: |
    Unrestricted access on TCP port 5432 increases vulnerability to unauthorized access and potential data breaches.
  remediation: |
    Restrict inbound traffic to PostgreSQL servers by setting stringent rules in EC2 security groups, limiting access to specific IPs or ranges.
  reference:
    - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html#security-group-rules
  tags: cloud,devops,aws,amazon,ec2,aws-cloud-config

variables:
  region: "us-east-1"

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      aws ec2 describe-security-groups --region $region --filters Name=ip-permission.from-port,Values=5432 Name=ip-permission.to-port,Values=5432 Name=ip-permission.cidr,Values='0.0.0.0/0' --query 'SecurityGroups[*].GroupId' --output json

    extractors:
      - type: json
        name: securitygroup
        internal: true
        json:
          - '.[]'

      - type: dsl
        dsl:
          - 'securitygroup + " security group(s) alows unrestricted access (0.0.0.0/0 or ::/0) on TCP port 5432"'
# digest: 4a0a0047304502207fbe0465e1e3fd458e80aff1c5afb78024abf6239136274b44977d468a0a33b5022100c40061c163a4bd3bb4b263eb6de785feaef9723ccd780bcb2d1d4f733efc4506:922c64590222798bb761d5b6d8e72950