Automated Cloud Security Auditor

1. S3 Bucket Security

• ▸Public Access: Identifies publicly accessible buckets and objects
• ▸Encryption: Validates encryption at rest and in transit
• ▸Versioning: Checks if versioning is enabled for data protection
• ▸Logging: Ensures access logging is configured
• ▸Bucket Policies: Analyzes bucket policies for overly permissive access
• ▸MFA Delete: Verifies MFA delete protection is enabled

2. IAM Configuration

• ▸Root Account: Checks for root account usage and MFA
• ▸Password Policy: Validates password complexity requirements
• ▸Unused Credentials: Identifies dormant users and access keys
• ▸Privilege Escalation: Detects overly permissive policies
• ▸Service Roles: Reviews cross-service trust relationships
• ▸Access Keys: Identifies old or unused access keys

3. EC2 Instance Security

• ▸Security Groups: Analyzes firewall rules for open ports
• ▸Key Pairs: Identifies instances with shared key pairs
• ▸Instance Metadata: Checks IMDSv2 enforcement
• ▸Public IPs: Identifies unnecessarily public instances
• ▸EBS Encryption: Validates volume encryption settings

4. Network Security

• ▸VPC Configuration: Reviews network segmentation
• ▸Flow Logs: Ensures VPC flow logging is enabled
• ▸NACL Rules: Analyzes network ACL configurations
• ▸Route Tables: Reviews routing for security risks

Modular Design

The auditor is built with a modular architecture allowing easy addition of new security checks:

src/
├── auditor/
│   ├── core/
│   │   ├── aws_client.py      # AWS session management
│   │   ├── scanner.py         # Main scanning engine
│   │   └── reporter.py        # Report generation
│   ├── checks/
│   │   ├── s3_checks.py       # S3 security validations
│   │   ├── iam_checks.py      # IAM security validations
│   │   ├── ec2_checks.py      # EC2 security validations
│   │   └── vpc_checks.py      # VPC security validations
│   └── utils/
│       ├── config.py          # Configuration management
│       └── helpers.py         # Utility functions
├── config/
│   ├── rules.yaml             # Security rule definitions
│   └── settings.yaml          # Application settings
└── tests/                     # Unit tests

Rule-Based Engine

Security checks are defined in YAML configuration files, making the tool easily customizable:

s3_rules:
  public_bucket_check:
    enabled: true
    severity: "HIGH"
    description: "S3 bucket allows public access"
    remediation: "Restrict public access"

  encryption_check:
    enabled: true
    severity: "MEDIUM"
    description: "S3 bucket encryption not enabled"
    remediation: "Enable SSE-S3 or SSE-KMS"

Security Improvements

• ▸Issues Identified: 247 security misconfigurations
• ▸High-Risk Findings: 23 critical vulnerabilities
• ▸Compliance Improvement: 89% → 97% CIS compliance
• ▸Response Time: 2 hours average remediation time
• ▸Cost Optimization: $2,400/month savings identified
• ▸Automation Efficiency: 95% reduction in manual audits
• ▸Coverage: 100% of AWS resources scanned
• ▸False Positives: <5% accuracy rate

Common Findings

• ▸S3 Misconfigurations: 34% of buckets had public read access
• ▸IAM Issues: 67% of users had unused access keys >90 days old
• ▸Network Security: 45% of security groups had overly permissive rules
• ▸Encryption: 23% of EBS volumes lacked encryption