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ID:

uniswap-530

Date:

Status:

Incident Count:

April 18, 2020

Verified

2

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REKT

Contributor:

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zerofriction.io

KYC By:

KYC:

None

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Audit By:

Audits:

None

Loss Amount:

242,000

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Recovered:

-

Rewards:

Currency:

USD, imBTC

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Key Indicators

Platform:

Type:

Category:

Method:

Data Sources:

Multi-Chain

Protocol

Dexes

Contract Vulnerabilities

Extended Method:

Reentrancy attack

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Days in Operation:

0

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A known reentrancy vulnerability was exploited on Uniswap against the imBTC. liquidity pool. Around 24 hours later, at Apr-19–2020 12:58:43 AM +UTC, a similar hack occurred on Lendf.Me.” reads the analysis published by Blockchain security firm PeckShield. “Technically, the main logic behind these two incidents is the fact that the implementation of ERC777-compatible transferFrom() has a callback mechanism, which allows the attacker to utterly hijack the transaction and perform additional illicit operations (via _callTokensToSend()) before the balance is really updated (i.e., inside _move()). Uniswap was hacked and lost 1278 ETH.

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