Binance Smart Chain
Days in Operation:
100 pts each
The Orion protocol is hacked due to a reentrancy issue in its core contract: ExchangeWithOrionPool. Both eth/bsc deployment are hacked, and the stolen funds are bridged across Celer Network cBridge and then onto Tornado.cash.
The hack is made possible due to incomplete reentrancy protection: swapThroughOrionPool func allows user-provided swap path w/ crafted tokens whose transfer can be hijacked into re-entering depositAsset func to increase user balance accounting w/o actually costing funds.
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