Lethal Integration: Vulnerabilities in Hooks Due to Risky Interactions

As highlighted in our previous article, over 30% of projects in the Awesome Uniswap v4 Hooks repository exhibit vulnerabilities. We'll focus on two critical aspects:

- Flawed Access Control: Proper access controls are crucial for secure Hook-PoolManager and Hook-Internal interactions.

Improper Input Validation: Inadequate validation of registered pools can create attack vectors.

Vulnerability Analysis:

-Flawed Access Control:Hook-PoolManager Interaction: Strict access controls must be enforced on callback functions to prevent exploitation by malicious actors.Hook-Internal --Interaction: The absence of restrictions on internal function calls poses a vulnerability.

Exploitation & Mitigation:

Use poolManagerOnly and selfOnly modifiers to control access.Exploitation examples highlight the need for stringent access controls to avoid unexpected behaviors.

Improper Input Validation:Proper Access Control: Use poolManagerOnly and selfOnly modifiers to restrict access to sensitive functions.Reentrancy Lock: Consider implementing a reentrancy lock to prevent malicious logic from re-entering sensitive functions.Whitelisting Approach: Admin approval for whitelisted pools can enhance security but limits functionality.

Conclusion:

Hooks in Uniswap v4 may have vulnerabilities in access control and input validation. Developers must balance security and functionality, understanding every line of their contracts for safety.

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