ArkProject: NFT Bridge
ArkProject
NFTBridge
60,000 USDC
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Submission Details
Severity: high
Invalid

Input Validation

lightningscorch

  1. Input Validation:

    Lack of input validation in user-provided data, such as addresses, amounts, and metadata, can lead to vulnerabilities like integer overflow, underflow, and other unexpected behaviors.

    • Description: Input validation vulnerabilities occur when user-provided data is not properly validated before processing. This can lead to exploits such as integer overflow, underflow, and unexpected data formats. Inadequate input validation can lead to various exploits such as integer overflow, underflow, and reentrancy vulnerabilities. Lack of proper validation can result in unexpected behavior and security risks.

    • Impact: Without robust input validation, attackers can manipulate input data to trigger unexpected behaviors, potentially leading to financial losses, contract failures, or security breaches. Ensure that input parameters are thoroughly validated to prevent malicious inputs, boundary issues, and unauthorized actions. Validate addresses, check for valid amounts, and verify the sender's permissions before executing critical functions.

    • Mitigation: Implement strict input validation checks for all user inputs, including address formats, numerical ranges, and data types. Utilize SafeMath libraries to prevent integer overflow/underflow vulnerabilities.

      Implement input validation checks using require statements for each parameter. Use modifiers to enforce validation rules consistently across functions. Consider input sanitization techniques to filter out invalid or malicious inputs effectively.

function transfer(address _to, uint256 _amount) public {
require(_to != address(0), "Invalid recipient address");
require(_amount > 0, "Transfer amount must be greater than zero");
// Ensure the sender has enough balance for the transfer
require(balanceOf[msg.sender] >= _amount, "Insufficient balance for transfer");
// Deduct the transferred amount from the sender and add to the recipient
balanceOf[msg.sender] -= _amount;
balanceOf[_to] += _amount;
// Emit an event to log the transfer
emit Transfer(msg.sender, _to, _amount);
}
pragma solidity ^0.8.0;
​
contract Token {
mapping(address => uint256) public balanceOf;
​
event Transfer(address indexed from, address indexed to, uint256 amount);
​
function transfer(address _to, uint256 _amount) public {
require(_to != address(0), "Invalid recipient address");
require(_amount > 0, "Transfer amount must be greater than zero");
// Ensure the sender has enough balance for the transfer
require(balanceOf[msg.sender] >= _amount, "Insufficient balance for transfer");
// Deduct the transferred amount from the sender and add to the recipient
balanceOf[msg.sender] -= _amount;
balanceOf[_to] += _amount;
// Emit an event to log the transfer
emit Transfer(msg.sender, _to, _amount);
}
}

I utilized a combination of tools, methods, and procedures to identify the vulnerability related to centralized control by the Bridge admin in the ArkProject NFT Bridge:

  1. Code Review: I conducted a thorough review of the smart contracts and project documentation to understand the roles and permissions assigned to different actors within the bridge ecosystem.

  2. Static Analysis Tools: I employed static analysis tools specific to Solidity smart contracts to analyze the codebase for potential vulnerabilities, focusing on authorization logic and access control mechanisms.

  3. Manual Testing: I manually examined the smart contract code to identify any centralized control mechanisms that could pose security risks, particularly in relation to the Bridge admin's capabilities.

  4. Security Best Practices: I applied industry best practices and security guidelines for blockchain development, including principles of least privilege, role-based access control, and authorization checks.

  5. Risk Assessment: I assessed the potential impact of the identified vulnerability on the security and functionality of the ArkProject NFT Bridge, considering the implications of unauthorized access and malicious actions by the Bridge admin.

By combining these tools, methods, and procedures, I was able to identify the vulnerability and provide recommendations for enhancing the security posture of the ArkProject NFT Bridge. Conducting a comprehensive security assessment and implementing proactive measures are essential steps in mitigating risks and ensuring the integrity of blockchain applications.

Updates

Lead Judging Commences

n0kto Lead Judge 10 months ago
Submission Judgement Published
Invalidated
Reason: Too generic

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