Summary

The MondrianWallet2 smart contract contains a critical vulnerability in the executeTransactionFromOutside function, allowing anyone to execute transactions without validation, leading to the potential loss of the entire wallet balance.

Vulnerability Details

The executeTransactionFromOutside function is designed to execute transactions from outside the contract. However, it lacks the necessary validation mechanism to ensure that only the wallet owner can initiate transactions. This allows an attacker to craft malicious transactions and execute them through this function, transferring the entire wallet balance to an attacker-controlled address.

An attacker would only need to create a Transaction object with the desired parameters (recipient address, amount, data, etc.) and call the executeTransactionFromOutside function with this object. Since no validation is performed, the transaction would be executed immediately.

Impact

This vulnerability could lead to severe financial losses for users of the contract. An attacker could exploit this flaw to drain the entire balance of a user's wallet with ease.

Tools Used

Manual Review

Recommendations

Add transaction validation logic similar to that in the validateTransaction function, including transaction signature verification to ensure that only the wallet owner can execute transactions.