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Detail Analysis

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Date:

Status:

Count:

Contributor:

March 20, 2022

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Verified

2

zerofriction.io

Loss Amount:

700,000

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Recovered Amount:

-

Currency:

Dollars, ETH, BNB

KYC By:

Audit By:

None

SlowMist

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Key Indicators

Platform:

Type:

Category:

Method:

Ethereum, Binance Smart Chain

Platform

Oracle

Contract Vulnerabilities

Extended Method:

Integer underflow

Data Sources:

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Umbrella is the first truly decentralized oracle service providing low cost, massively scalable, and secure solutions for smart contracts.The reward pools are drained at both @BNBCHAIN and @ethereum, leading to the ~$700K gain for the hacker! The hack is possible because of an unchecked underflow in withdraw() so that anyone can withdraw any amount even without any balance!

https://twitter.com/peckshield/status/1505495324516782081/photo/1

So they were audited but the contract changed after it was deployed.

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Under no circumstances, shall Zero Friction LLC be liable for any loss of profit or funds, any regulatory or governmental penalties, any legal costs, or any other commercial and non-commercial damages, including but not limited to special, incidental, consequential, or other damages from any or all usage of the dataset or information derived from our database.