Upgrade Authorization Role Auditor

WHAT IT DOES

The Upgrade Authorization Role Auditor is a security tool that audits authorization mechanisms for upgrade functions in upgradeable smart contracts. It scans contract source code for upgrade-related functions (upgrade, upgradeTo, upgradeToAndCall, changeImplementation), identifies access control patterns (onlyOwner, onlyRole, custom modifiers), and audits whether each upgrade function has proper authorization. This helps developers ensure that only authorized roles can upgrade the contract, preventing unauthorized upgrades that could compromise the protocol.

HOW TO USE

Paste your upgradeable contract source code into the text area. Click "audit upgrade authorization" to begin the analysis. The tool identifies all upgrade functions, checks for authorization mechanisms, and generates a detailed report. Results display the number of upgrade functions found, whether AccessControl or Ownable is imported, and a table showing each upgrade function with its authorization type and status (protected/unprotected). The report also includes tailored recommendations based on the audit findings.

TECHNICAL MECHANISM

The tool parses Solidity source code using regex-based extraction of function definitions. It identifies upgrade functions by matching names against common patterns: upgrade, upgradeTo, upgradeToAndCall, changeImplementation, and similar variants. For each identified function, it extracts the function signature and analyzes it for authorization patterns: OpenZeppelin's onlyOwner modifier, AccessControl's onlyRole modifier, custom authorization modifiers (onlyGovernance, onlyAdmin, onlyProxyAdmin), and any modifier definitions within the contract. The tool also detects whether AccessControl or Ownable is imported by scanning for these strings in the source. The analysis categorizes functions as protected if they have at least one authorization modifier and unprotected if they lack any authorization. Results are displayed with color-coded status indicators and actionable recommendations.

WHAT IT CANNOT SEE

The tool cannot verify if the owner or admin address is secure or if private keys are properly managed. It cannot detect if upgrade authorization can be bypassed through delegatecall or selfdestruct. The tool cannot identify upgrade authorization that depends on external contract state not visible in the source. It cannot validate that the role system is correctly implemented across all contracts. The tool cannot detect if upgrade functions are accidentally exposed through inheritance. It cannot verify that the upgrade authority is not compromised by other vulnerabilities. The tool cannot determine if the upgrade process is safe without manual review.

PLEASE NOTE

This tool is designed for Ethereum Virtual Machine (EVM) compatible chains. The analysis is based on static source code analysis and may not detect all authorization issues. The tool provides recommendations only and should be used as part of a comprehensive security review process. Always test upgrades on a testnet before deploying to mainnet. Consider using multi-sig wallets or timelock contracts for upgrade authorization in production. The tool does not verify that the authorization mechanism is correctly implemented—only that some form of authorization exists.