Overview
Perimeter Security offers comprehensive smart contract security testing through specialized fuzzing services designed to uncover deep-rooted bugs and vulnerabilities before deployment. Their fuzzing-first approach combines automated testing with rigorous security standards to identify issues that traditional manual audits might miss, with proven success preventing exploits across major DeFi protocols including Berachain, Origin Protocol, Pendle, and others.
Core Testing Services
Offensive Fuzzing
Perimeter's foundational security service provides comprehensive invariant testing to uncover vulnerabilities through millions of test instances. Each engagement utilizes both stateful and stateless fuzzing techniques with Echidna and Medusa fuzzing engines, testing at least 50,000,000 instances per implemented invariant on enterprise hardware.
Key Features:
- Tailor-made fuzzing suite design and implementation for your protocol
- Deep fuzzing runs focused on tracing broken invariants and edge-case behavior
- Proof-of-Concept development for each finding and assertion counterexample
- Comprehensive final report detailing findings, tested invariants, run status, and methodology
- Codebase integration via pull request with finalized fuzzing harness
- Remediations for identified issues
- No parallel reviews - guaranteed full focus on your engagement
- POCs provided for all High/Critical and non-trivial findings
Defensive Fuzzing
Perimeter's most comprehensive security offering builds upon Offensive Fuzzing with enhanced depth, complete documentation, and long-term integration capabilities for protocols requiring the highest level of security assurance.
Enhanced Capabilities:
- Highest level of depth with extended testing coverage and sophisticated invariant implementation
- Complete documentation including invariant explanations, harness architecture, setup guides, and knowledge transfer materials
- Cost-efficient long-term solution with optimized architecture for continuous integration
- Production-ready CI/CD integration compatible with GitHub Actions, GitLab CI, and other platforms
- Advanced scaffolding and proprietary libraries enabling highly sophisticated invariant formalization
- Custom data structures tailored to protocol-specific requirements
- Multi-contract interaction testing for complex DeFi composability
- On-chain state fuzzing capabilities through Recon partnership
Bespoke Fuzzing
Premium custom security service for protocols with unique requirements extending beyond standard EVM smart contract fuzzing.
Specialized Offerings:
- Non-EVM Fuzzing: Rust-based contracts (Solana, Near, Cosmos, Polkadot), Move platforms (Aptos, Sui), custom VMs
- Blockchain/DLT Fuzzing: Consensus mechanism validation, P2P network protocol testing, state transition function analysis
- Dedicated Tooling Development: Proprietary fuzzing frameworks, custom invariant libraries, specialized testing harnesses
- Security Advisory Services: Architecture review, threat modeling, security roadmap development, incident response planning, long-term retainer arrangements
Testing Reinforcement
Comprehensive unit testing suite development that establishes baseline test coverage to complement advanced fuzzing techniques.
Deliverables:
- Greater test coverage with line, branch, and function coverage optimization
- Deeper branching with edge case and boundary condition validation
- Low-hanging issue detection for input validation, access control, arithmetic errors, and reentrancy vulnerabilities
- Integration tests for multi-contract systems using Foundry and Hardhat frameworks
- CI/CD configuration for automated test execution
- Coverage reports with metrics and gap analysis
Engagement Process
Perimeter follows a structured 6-phase methodology:
- Engagement Kickoff - Align on objectives, review technical architecture, identify key invariants
- Build Phase - Develop fuzzing harness, implement simple invariants, identify complex ones
- Execution Phase - Perform deep fuzzing runs on enterprise hardware
- Remediations - Update harness to reflect fixes from execution phase findings
- Report Delivery - Provide detailed report summarizing findings, methodology, recommendations
- Codebase Integration - Submit pull request with finalized fuzzing harness
Quality Guarantees
- Minimum one lead fuzzing specialist assigned per engagement
- Clear communication at every stage with frequent updates
- Fully transparent process from start to finish
- Fastest timelines with minimal coordination overhead
- Real-world impact comparable to preventing exploits like the $46M Kyberswap hack
Notable Implementations
- Berachain: Multiple Defensive Fuzzing engagements testing innovative proof-of-liquidity mechanism with extremely complex simulations
- Immutable zkEVM Bridge: Comprehensive bridge contract security with long-term harness integration
- Drips Network: Complete fuzzing suite development with extensive edge case coverage
- Tapioca DAO: Testing Reinforcement engagements (May-June 2024) for omnichain protocol infrastructure
Ideal Use Cases
- Pre-launch security validation for new protocols
- Identifying complex math errors and rounding issues
- Testing complex business logic that manual reviews might miss
- Large-scale DeFi protocols with complex business logic
- Protocols requiring ongoing security through multiple upgrade cycles
- Projects preparing for mainnet launch with significant TVL expectations
- Non-EVM platforms and custom blockchain implementations
