Summary:

The TempleGold smart contract contains a vulnerability where the distributeGold external function can be called by any address, potentially leading to inefficient distribution of rewards due to the internal _distributeGold function not handling exceptional cases properly.

Vulnerability Details:

This found in distributeGold external function can be called by any address because
there are no checks to confirm who is calling

Impact:

If an attacker calls the distributeGold function at an inappropriate time or without proper checks, the _distributeGold function may attempt to mint TGLD tokens from the rewardToken contract unnecessarily, leading to:

• Wastage of gas fees and blockchain resources.

• Inefficient allocation of rewards if not synchronized properly with the reward distribution process.

• Potential disruptions or delays in the reward distribution mechanism.

Proof of Concept/Explanation:

The vulnerability arises from the following code snippet:

Scenario:

1. Attacker Action:

   • An attacker calls the distributeGold function directly from an external address.

2. Internal Function Call:

   • The external call triggers _distributeGold, which internally attempts to mint TGLD tokens using ITempleGold(address(rewardToken)).mint();.

3. Potential Exploitation:

   • If the rewardToken contract is improperly configured or if there are no rewards to distribute (TGLD tokens), the mint function may fail silently or consume gas unnecessarily.

Tools Used:

Manual, Foundry

Recommendations:

To mitigate this vulnerability, consider the following steps:

• Access Control:

  • Implement access control mechanisms to ensure that only authorized contracts or addresses can call the distributeGold function.

• Input Validation:

  • Add checks within the distributeGold function to validate conditions before invoking _distributeGold, ensuring that rewards are only distributed when necessary.