Decentralized finance (DeFi) lending protocol Euler Finance grew to become a sufferer of a flash mortgage assault on March 13, ensuing within the largest hack of crypto in 2023 to this point. The lending protocol misplaced almost $197 million within the assault and impacted greater than 11 different DeFi protocols as effectively.
On March 14, Euler got here out with an replace on the state of affairs and notified its customers that they’d disabled the susceptible etoken module to dam deposits and the susceptible donation operate.
The agency stated that they work with varied safety teams to carry out audits of its protocol, and the susceptible code was reviewed and accredited throughout an out of doors audit. The vulnerability was not found as a part of the audit.
One in all our auditing companions, @Omniscia_sec, ready a technical autopsy and analysed the assault in nice element. You possibly can learn their report right here:https://t.co/u4Z2xdutwe
In brief, the attacker exploited susceptible code which allowed it to create an unbacked token debt… https://t.co/FGnPqvYUGB
— Euler Labs (@eulerfinance) March 14, 2023
The vulnerability remained on-chain for eight months till it was exploited, regardless of a $1 million bug bounty in place.
Sherlock, an audit group that has labored with Euler Finance up to now, verified the foundation explanation for the exploit and helped Euler submit a declare. The audit protocol later voted on the declare for $4.5 million, which handed, and later executed a $3.3 million payout on March 14.
In its evaluation report, the audit group famous a major issue for the exploit: a lacking well being verify in “donateToReserves,” a brand new operate added in EIP-14. Nevertheless, the protocol burdened that the assault was nonetheless technically attainable even earlier than EIP-14.
Associated: Greater than 280 blockchains prone to ‘zero-day’ exploits, warns safety agency
Sherlock famous that the Euler audit by WatchPug in July 2022 missed the important vulnerability that finally led to the exploit in March 2023.
Equally, Sherlock stands behind each auditor who reviewed Euler.
Sherlock initially labored with @cmichelio to audit the primary model of Euler in Dec 2021, then with @shw9453 to audit a really small replace in Jan 2022, and eventually with @WatchPug_ to audit EIP-14 in July 2022.
— SHERLOCK (@sherlockdefi) March 13, 2023
Euler has additionally reached out to main on-chain analytic and blockchain safety corporations, reminiscent of TRM Labs, Chainalysis and the broader ETH safety group, in a bid to assist them with the investigation and get well the funds.
Euler notified that also they are attempting to contact these chargeable for the assault in an effort to study extra in regards to the challenge and probably negotiate a bounty to get well the stolen funds.
