Governance Attack Surface Review: Bybit

Bybit has quickly become a major player in the decentralized finance (DeFi) space. Understanding its governance mechanisms is crucial, especially given the increasing importance of security in DeFi platforms.

What is Governance Attack Surface?

The governance attack surface refers to the potential vulnerabilities in the governance mechanisms of a platform. These mechanisms include how decisions are made, how proposals are submitted, and how votes are counted. In the case of Bybit, its governance layer oversees significant financial resources and critical functions.

Key Findings from the Review

The Governance Attack Surface Review of Bybit identified several critical issues:

Issue Category	Severity	Likelihood	Impact	Overall Risk Score
Token concentration & voting power centralization	High	High	Governance capture leading to malicious treasury movements	8
Insufficient quorum / low proposal threshold	Medium	Medium	Small attacker can push proposals with flash-loan-derived voting power	6
Flash-loan-driven voting attacks	High	Medium	Rapid acquisition of BYT for a single block, executing malicious proposals before timelock expires	7
Timelock configuration weaknesses (short delay, upgradable delay)	High	Medium	Reduces reaction window for community, enables "instant-upgrade" attacks	7
Upgradeable proxy admin control (single-key admin)	Critical	Medium	Admin can replace core contracts with malicious code, bypassing all governance checks	9
Multi-sig wallet composition & signer compromise	High	Medium	Compromise of a single signer can approve malicious proposals	8
Cross-chain bridge governance coupling	High	Medium	Bridge parameters (fee, asset list) can be altered to siphon funds across L2s	8
Lack of proposal execution sandbox / re-entrancy guard	Medium	Low	Malicious proposal can call into vulnerable contracts, causing re-entrancy loss	5
Off-chain DAO tooling (snapshot, IPFS) integrity	Low	Low	Manipulated off-chain vote snapshots could mislead community but not directly on-chain	3
Emergency pause / circuit-breaker misuse	Medium	Low	Admin can pause core contracts arbitrarily, freezing user funds	4

The overall governance risk score for Bybit is 7.2 out of 10, indicating a high risk level. The combination of centralized voting power, a single-key upgrade admin, and a relatively short timelock creates vulnerabilities that could be exploited.

Identified Attack Vectors

The review identified several specific attack vectors that could be exploited:

1. Token Concentration & Voting Power Centralization

The top 10 holders of BYT control about 68% of the total supply. This centralization means that a small group can easily pass proposals, including those that could harm the treasury.

2. Low Quorum / Proposal Threshold

The governance contract requires only 1% of the total supply to create a proposal and a 4% quorum for execution. This low threshold makes it easy for attackers to push malicious proposals.

3. Flash-Loan-Driven Voting Attacks

Since BYT is an ERC-20 token without protective mechanisms, attackers can borrow BYT temporarily to vote and then return it before the vote is finalized.

4. Timelock Configuration Weaknesses

The current timelock settings are short, allowing little time for community monitoring before proposals can be executed.

5. Upgradeable Proxy Admin Control

The admin control is centralized, meaning that if compromised, an attacker could replace core contracts with malicious versions.

6. Multi-Sig Wallet Composition

The multi-sig wallet has vulnerabilities due to the composition of its signers, which includes custodial hot wallets that could be compromised.

7. Cross-Chain Bridge Governance Coupling

Changes to bridge parameters could allow malicious actors to siphon funds across different layers.

8. Lack of Proposal Execution Sandbox

The absence of a sandbox for proposal execution means that malicious proposals can exploit vulnerable contracts.

9. Off-Chain DAO Tooling Integrity

Manipulated off-chain votes could mislead the community, although this does not directly affect on-chain operations.

10. Emergency Pause / Circuit-Breaker Misuse

The admin can pause all functions, which could freeze user assets indefinitely.

Recommendations

To address these vulnerabilities, the review suggests several recommendations:

1. Migrate Admin Control: Move admin control of upgradeable proxies to a multi-signature wallet with hardware signers to reduce single-point failure risks.
2. Implement Voting Power Lock-Up: Introduce a mechanism that locks up voting power to prevent flash-loan attacks.
3. Increase Quorum and Proposal Thresholds: Raise the thresholds for creating proposals and executing them to make it harder for attackers to push malicious proposals.

Conclusion

The Governance Attack Surface Review of Bybit highlights significant vulnerabilities in its governance structure. Addressing these issues is crucial for enhancing security and protecting user assets.

Merits

• Provides a clear overview of governance vulnerabilities.
• Offers actionable recommendations for improving security.
• Raises awareness about the importance of governance in DeFi platforms.

Demerits

• The report may raise concerns among users about the platform's security.
• Implementing recommendations may require time and resources.

Caution

This article is for educational purposes only. Any placeholder values must be replaced with actual data when implementing recommendations. Readers should verify claims against the original source before relying on them.

Frequently asked questions

• What is Bybit? — Bybit is a decentralized finance platform with a significant amount of total value locked.
• What is governance in DeFi? — Governance in DeFi refers to the mechanisms through which decisions are made regarding the platform's operations.
• What are flash loans? — Flash loans are uncollateralized loans that must be repaid within a single transaction block.
• What is a multi-sig wallet? — A multi-sig wallet requires multiple signatures to authorize a transaction, enhancing security.
• What is a timelock? — A timelock is a delay that must pass before a proposal can be executed, allowing time for community review.
• What are ERC-20 tokens? — ERC-20 tokens are a standard for creating tokens on the Ethereum blockchain.

Tags

#bybit #governance #defi #security #ethereum #blockchain #cryptocurrency #finance #audit #vulnerabilities