Flow

Summary

The deposit, withdraw, and adjustRatePerSecond functions rely on the onlySender modifier and _verifyStreamSenderRecipient to verify caller identity. However, insufficient validation could allow attackers to impersonate either party, resulting in unauthorized actions.

Vulnerability Details

These functions depend on onlySender and _verifyStreamSenderRecipient for validation, without additional checks to securely verify the sender and recipient roles:

This lack of comprehensive validation could enable attackers to impersonate the sender or recipient, potentially adjusting the rate, depositing, or withdrawing funds fraudulently.

Impact

Unauthorized access could allow:

1. Manipulation of stream parameters, such as rate adjustments.

2. Unauthorized withdrawals, resulting in financial loss for legitimate users.

Tools Used

Manual code review

Recommendations

Strengthen sender and recipient validation by incorporating off-chain hashing and signing to verify identities securely.