audit-report-generation

# Audit Report Generation ## Report Structure ``` 1. Executive Summary 2. Scope & Methodology 3. System Overview 4. Findings 5. Risk Summary 6. Recommendations 7. Appendices ``` ## Report Template ```markdown # Security Audit Report ## Protocol Name — Audit Report **Audit Period**: YYYY-MM-DD to YYYY-MM-DD **Commit**: abc1234 **Auditor(s)**: [Names] **Report Version**: 1.0 --- ## 1. Executive Summary [Protocol Name] is a [brief description]. This audit reviewed [X] contracts comprising [Y] SLOC deployed on [chain(s)]. ### Results Summary | Severity | Count | Fixed | Acknowledged | Open | |----------|-------|-------|-------------|------| | Critical | 0 | 0 | 0 | 0 | | High | 1 | 1 | 0 | 0 | | Medium | 3 | 2 | 1 | 0 | | Low | 5 | 3 | 2 | 0 | | Informational | 4 | 2 | 2 | 0 | | **Total** | **13** | **8** | **5** | **0** | ### Overall Assessment [1-2 paragraph summary of the security posture. Note the most significant findings and the team's response. Mention code quality, test coverage, and adherence to best practices.] --- ## 2. Scope & Methodology ### In-Scope Contracts | Contract | SLOC | Risk Rating | |----------|------|-------------| | src/Vault.sol | 245 | High | | src/Strategy.sol | 189 | Medium | | src/Oracle.sol | 78 | Medium | | src/Governance.sol | 156 | Low | | **Total** | **668** | | ### Out of Scope - Test files, deployment scripts - Frontend / offchain infrastructure - OpenZeppelin library code (v5.0.1) ### Methodology 1. **Recon** (Day 1): Automated analysis (Slither, Aderyn), architecture mapping 2. **Breadth** (Days 2-3): Systematic review of all functions and access controls 3. **Depth** (Days 4-6): Focused analysis on high-risk areas, PoC construction 4. **Verification** (Day 7): Finding verification, severity classification, report ### Tools Used - Foundry (forge test, forge coverage) - Slither v0.10.x - Aderyn v0.x.x - Manual review --- ## 3. System Overview ### Architecture [Diagram or text description of contract relationships] ### Key Mechanisms - **Deposits**: Users deposit USDC, receive vault shares - **Yield**: Strategy deploys assets to Aave V3 - **Withdrawals**: Users redeem shares for USDC + yield - **Governance**: Owner (multisig) controls strategy and parameters ### Trust Assumptions - Owner multisig is honest and competent - Chainlink oracle provides accurate, timely prices - Aave V3 operates correctly --- ## 4. Findings ``` ## Finding Format ```markdown ### [H-01] Share Inflation via First Depositor Attack **Severity**: High **Status**: Fixed (commit def5678) **Category**: Logic Error #### Description The vault does not implement virtual shares or a minimum deposit, allowing an attacker to inflate the share price and steal from subsequent depositors. The attacker deposits 1 wei to receive 1 share, then donates a large amount directly to the vault. The next depositor's shares are rounded down to 0, transferring their entire deposit to the attacker. #### Affected Code ```solidity // src/Vault.sol, line 45 function deposit(uint256 assets, address receiver) external returns (uint256 shares) { shares = assets * totalSupply() / totalAssets(); // rounds to 0 when totalAssets >> assets // ... } ``` #### Impact Any user depositing after the attacker loses their entire deposit. Requires the attacker to be the first depositor and front-run the second deposit. **Loss**: Up to 100% of the victim's deposit. #### Proof of Concept See `test/poc/PoCShareInflation.t.sol`: ```solidity function test_PoC_firstDepositorShareInflation() public { // Attacker deposits 1 wei vm.prank(attacker); vault.deposit(1, attacker); // Attacker donates to inflate price vm.prank(attacker); token.transfer(address(vault), 1_000_000e6); // Victim gets 0 shares vm.prank(victim); uint256 shares = vault.deposit(999_999e6, victim); assertEq(shares, 0); // VULNERABILITY: victim gets nothing } ``` #### Recommendation Implement virtual shares and virtual assets offset: ```solidity uint256 internal constant VIRTUAL_SHARES = 1e3; uint256 internal constant VIRTUAL_ASSETS = 1; function convertToShares(uint256 assets) public view returns (uint256) { return assets.mulDiv(totalSupply() + VIRTUAL_SHARES, totalAssets() + VIRTUAL_ASSETS); } ``` ``` ## Risk Summary Table ```markdown ## 5. Risk Summary | ID | Title | Severity | Status | |----|-------|----------|--------| | H-01 | Share inflation via first depositor | High | Fixed | | M-01 | Oracle staleness check insufficient | Medium | Fixed | | M-02 | Harvest sandwich attack | Medium | Acknowledged | | M-03 | Missing withdrawal limit | Medium | Fixed | | L-01 | Event parameter ordering incorrect | Low | Fixed | | L-02 | Redundant approval in withdraw | Low | Acknowledged | | L-03 | Missing zero-address check in constructor | Low | Fixed | | L-04 | Floating pragma | Low | Fixed | | L-05 | Centralization risk: owner can change strategy | Low | Acknowledged | | I-01 | Use custom errors instead of strings | Info | Fixed | | I-02 | Missing NatSpec on public functions | Info | Acknowledged | | I-03 | Unused import in Strategy.sol | Info | Fixed | | I-04 | Consider two-step ownership transfer | Info | Acknowledged | ``` ## Recommendations Section ```markdown ## 6. Recommendations ### Short Term (before deployment) 1. Fix all Critical and High findings 2. Add invariant tests for core accounting 3. Implement emergency pause mechanism 4. Add monitoring for health factor degradation ### Medium Term (post-deployment) 1. Add time-delayed oracle fallback 2. Implement withdrawal queuing for large amounts 3. Deploy on testnet with full integration testing ### Long Term 1. Consider formal verification for core math 2. Implement decentralized governance (reduce multisig dependency) 3. Multiple oracle sources for price resilience ``` ## Appendices ```markdown ## 7. Appendices ### A. Slither Output (Triaged) [Filtered Slither results with true/false positive annotations] ### B. Test Coverage | File | Lines | Branches | Functions | |------|-------|----------|-----------| | Vault.sol | 95% | 88% | 100% | | Strategy.sol | 92% | 85% | 100% | ### C. Gas Report [forge test --gas-report output for key functions] ### D. Verified Addresses | Contract | Chain | Address | |----------|-------|---------| | Vault | Mainnet | 0x... | | Strategy | Mainnet | 0x... | ``` ## Severity Definitions Include these definitions in every report: ```markdown ### Severity Definitions **Critical**: Direct theft of funds, permanent protocol bricking, or privilege escalation to admin-level access. **High**: Significant loss of funds (>1% TVL), temporary protocol DoS lasting >24h, or conditions leading to critical with additional steps. **Medium**: Moderate fund loss, griefing attacks, temporary DoS, value leakage over time, or governance manipulation. **Low**: Minor issues, gas inefficiencies, best practice violations with edge-case security implications. **Informational**: Code quality, readability, best practices with no direct security impact. ``` ## Checklist - [ ] Executive summary with results table - [ ] Scope definition with SLOC counts - [ ] Methodology section describing audit approach - [ ] System overview with architecture and trust assumptions - [ ] Each finding has: severity, status, description, impact, PoC, recommendation - [ ] Risk summary table with all findings - [ ] Recommendations section (short/medium/long term) - [ ] Appendices with tool output and coverage data - [ ] Severity definitions included - [ ] Report reviewed for clarity and accuracy before delivery - [ ] Fix review performed on resolved findings