Missing Access Control in getAddress Function

[c4-bot-8]

Lines of code

https://github.com/code-423n4/2024-03-taiko/blob/f58384f44dbf4c6535264a472322322705133b11/packages/protocol/contracts/common/IAddressManager.sol#L14

Vulnerability details

Impact

The impact of this vulnerability could be significant, depending on the sensitivity of the addresses being retrieved and the context of the application. Some potential impacts include:

1. Unauthorized access: Malicious actors could retrieve sensitive addresses associated with chainId-name pairs, potentially compromising the security of the application or its users.

2. Data manipulation: Without proper access control, unauthorized parties could manipulate the addresses returned by the function, leading to unexpected behavior or security breaches within the application.

3. Privacy violations: If the addresses being retrieved contain sensitive or personally identifiable information, their unauthorized access could result in privacy violations and regulatory non-compliance.

4. Financial losses: In some cases, the addresses retrieved might be associated with financial assets or transactions. Unauthorized access could lead to financial losses or theft if the retrieved addresses are used maliciously.

Overall, the impact of this vulnerability underscores the importance of implementing robust access control mechanisms to protect sensitive data and functionalities within the smart contract.

Proof of Concept

Here's a basic proof of concept demonstrating how an attacker could exploit the lack of access control in the getAddress function to retrieve sensitive addresses:

// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;

contract Attacker {
    address public targetAddressManager; // Address of the vulnerable contract

    // Event to log retrieved addresses
    event AddressRetrieved(address indexed sender, address retrievedAddress);

    // Function to set the address of the vulnerable contract
    function setTargetAddressManager(address _targetAddressManager) external {
        targetAddressManager = _targetAddressManager;
    }

    // Function to attack and retrieve addresses
    function attackGetAddress(uint64 _chainId, bytes32 _name) external {
        // Call the vulnerable getAddress function
        address retrievedAddress = IAddressManager(targetAddressManager).getAddress(_chainId, _name);

        // Log the retrieved address
        emit AddressRetrieved(msg.sender, retrievedAddress);
    }
}

interface IAddressManager {
    function getAddress(uint64 _chainId, bytes32 _name) external view returns (address);
}

Explanation:

• The Attacker contract is created to exploit the vulnerability in the getAddress function of the IAddressManager interface.
• The setTargetAddressManager function is used to set the address of the vulnerable contract (IAddressManager).
• The attackGetAddress function is called by the attacker to retrieve addresses by invoking the vulnerable getAddress function.
• The retrieved addresses are logged using an event.

This proof of concept demonstrates how an attacker could exploit the lack of access control to retrieve addresses from the vulnerable contract without authorization.

Tools Used

Manual code review and truffle

Recommended Mitigation Steps

To mitigate the vulnerability of missing access control in the getAddress function, several steps can be taken:

1. Implement Access Control: Add access control mechanisms to restrict who can call the getAddress function and under what conditions. This can be achieved by using modifiers, access control lists (ACLs), or role-based access control (RBAC) patterns.

2. Require Authentication: Require callers to authenticate themselves before accessing sensitive functionality. This could involve checking signatures, verifying permissions, or using authentication mechanisms like OAuth.

3. Role-Based Access Control (RBAC): Implement RBAC to define roles with specific permissions and assign these roles to users or contracts. Only users with the necessary role should be able to access the getAddress function.

4. Whitelisting: Maintain a whitelist of authorized addresses or contracts that are allowed to call the getAddress function. Reject calls from unauthorized addresses.

Any of this should help

Assessed type

Access Control

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minhquanym marked the issue as insufficient quality report

[minhquanym]

AI generated

[c4-judge]

0xean marked the issue as unsatisfactory: Insufficient quality