santosomar/pt-embedded-device-assessment

Embedded Device Assessment

Authorized Use Only

Embedded testing can damage hardware or interrupt operations. Confirm explicit authorization, safe handling procedures, and recovery plans before interacting with devices.

Objectives

1. Evaluate device security from physical access through runtime operation.
2. Identify weaknesses in firmware, interfaces, and update paths.
3. Determine practical exploitability and fleet-level impact.

Workflow

1. Define test environment:
   • Device models, firmware versions, accessories, and network topology
   • Recovery procedures, spare hardware, and fail-safe boundaries
2. Enumerate interfaces:
   • Physical (UART/JTAG/SWD), wireless, network services, companion apps
   • Boot modes and exposed maintenance/debug channels
3. Assess firmware and boot trust:
   • Firmware extraction and integrity validation where authorized
   • Secure boot, signature checks, rollback protections, key handling
4. Evaluate runtime security:
   • Local and remote service hardening
   • Credential storage, update mechanism security, telemetry exposure
5. Validate impact and remediation:
   • Demonstrate constrained exploitability
   • Recommend secure defaults and manufacturing/update controls

Output Template

# Embedded Assessment Output

## Device Context
- Model/version:
- Firmware build:
- Deployment context:

## Interface Findings
- Interface:
  - Exposure:
  - Weakness:
  - Evidence:
  - Impact:

## Firmware and Boot Findings
- Control tested:
  - Result:
  - Evidence:
  - Risk:

## Remediation Plan
- Immediate mitigations:
- Long-term architecture fixes:
- Validation/retest steps:

Quality Checks

• Safety and recovery constraints are documented and followed.
• Findings distinguish single-device vs fleet-wide risk.
• Recommendations address lifecycle: manufacturing, provisioning, updates, and decommissioning.