A $292 million exploit has shaken the cryptocurrency industry, revealing weaknesses in DeFi infrastructure and sparking concerns about the ripple effects on lending protocols. The attack, which occurred over the weekend, targeted Kelp's rsETH token and the mechanism for transferring assets between blockchains.
The perpetrator manipulated the system to create a large number of unbacked tokens, using them as collateral to borrow and drain real assets from lending markets, primarily from Aave, the largest decentralized crypto lender. This incident is the latest blow to DeFi, coming just weeks after the $285 million exploit of Solana-based protocol Drift, further eroding investor trust in the nearly $90 billion crypto sector. The attack exploited a LayerZero bridge component, which enables assets to move across different blockchains.
Kelp acted as the verifier, relying on a single-signer setup that allowed the attacker to mint a large amount of rsETH. The tokens were then deposited into lending protocols, mostly Aave, to borrow real ETH against them. This maneuver turned the exploit into a broader market issue, leaving DeFi lending platforms with potentially difficult-to-unwind collateral and valuable assets already drained.
As a result, Aave and other lending protocols may be holding hundreds of millions of dollars in questionable collateral and bad debt, raising concerns about a potential 'bank run' dynamic as users rush to withdraw funds. Aave saw a $6 billion drop in assets on the protocol as users withdrew their assets following the incident. The token associated with the protocol was down about 15% over the past 24 hours' trading.
Key questions remain about how the validator was compromised, with uncertainty over whether it was hacked, misconfigured, or misled. The attacker's identity is also unknown, although the scale of the attack suggests a sophisticated actor.
The exploit serves as a reminder that as DeFi grows more interconnected, failures in one layer can quickly cascade across the system. The incident has led to concerns about the trust in DeFi protocols, with some arguing that non-isolated lending models amplify the impact of such events. However, others believe that DeFi will learn from this incident and become stronger than before.