Sparkn

CodeFox Inc.
DeFiFoundryProxy
15,000 USDC
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Submission Details
Severity: high

Unencrypted Sensitive Data, exposing sensitive information to potential attackers.

0xVinylDavyl

Summary

The contract stores sensitive data, such as private keys or passwords, in an unencrypted format, which can expose sensitive information to potential attackers.

Vulnerability Details

The contract directly stores sensitive data, such as private keys or passwords, without encrypting them. Storing sensitive data in plain text makes it susceptible to unauthorized access and compromises the security of the contract and its users.

// Vulnerable Code: Unencrypted Sensitive Data
contract MyContract {
string private privateApiKey = "my_private_key";
string private password = "my_password";
​
// ...
}
​

Impact

Unencrypted sensitive data can be easily accessed and exploited by attackers. This can lead to unauthorized access to accounts, funds, and other sensitive resources associated with the contract, resulting in potential financial losses and security breaches.

Tools Used

Manual

Recommendations

  1. Avoid Hard-Coding Sensitive Data: Refrain from hard-coding sensitive data, such as private keys or passwords, directly into the contract's source code.

  2. Utilize Encryption: If sensitive data is required for contract functionality, consider using encryption techniques to secure the data before storage. Utilize libraries like OpenZeppelin's Encrypt.sol to encrypt sensitive information before storing it on-chain.

  3. External Key Management: Whenever possible, manage sensitive data externally, off-chain, using secure key management solutions. This reduces the risk of exposing sensitive data on the blockchain.

// Recommended Code: Secure Data Encryption
// Use OpenZeppelin's Encrypt.sol library to encrypt and securely store sensitive data.
​
import "@openzeppelin/contracts/utils/cryptography/Encrypt.sol";
​
contract MyContract {
using Encrypt for *;
​
bytes32 private encryptedPrivateApiKey;
bytes32 private encryptedPassword;
​
constructor(string memory privateKey, string memory userPassword) {
// Encrypt and store sensitive data during contract deployment
encryptedPrivateApiKey = privateKey.encrypt();
encryptedPassword = userPassword.encrypt();
}
​
// Function to retrieve decrypted sensitive data
function getPrivateApiKey(string memory encryptionKey) public view returns (string memory) {
// Decrypt sensitive data before returning
return encryptedPrivateApiKey.decrypt(encryptionKey);
}
​
// Function to retrieve decrypted password
function getPassword(string memory encryptionKey) public view returns (string memory) {
// Decrypt sensitive data before returning
return encryptedPassword.decrypt(encryptionKey);
}
​
// ...
}
​
More Details
Utilize OpenZeppelin's Encrypt.sol library to encrypt and securely store sensitive data within the contract. During contract deployment, encrypt the sensitive data using a secure encryption key. Provide functions that allow authorized parties to retrieve decrypted data using the same encryption key.
​
By following this recommendation, you can significantly enhance the security of sensitive data within your contract, protecting it from unauthorized access and potential exposure to attackers.

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