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ID:

umbrella-network-28

Date:

Status:

Incident Count:

March 20, 2022

Verified

2

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REKT

Contributor:

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zerofriction.io

KYC By:

KYC:

No

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Audit By:

Audits:

SlowMist

Loss Amount:

700,000

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Recovered:

-

Rewards:

Currency:

USD, ETH, BNB

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Key Indicators

Platform:

Type:

Category:

Method:

Data Sources:

Ethereum, Binance Smart Chain

Platform

Oracle

Contract Vulnerabilities

Extended Method:

Integer underflow

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Days in Operation:

956

(2.62 Years)

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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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