ID:
umbrella-network-28
100 pts
Platform:
Type:
Category:
Method:
Data Sources:
Ethereum, Binance Smart Chain
Platform
Oracle
Contract Vulnerabilities
Extended Method:
Integer underflow
Days in Operation:
956
(2.62 Years)
100 pts each
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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