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ID:

nerve-bridge-200

Date:

Status:

Incident Count:

November 7, 2021

Verified

1

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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:

537,000

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Recovered:

-

Rewards:

Currency:

USD, BNB

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Key Indicators

Platform:

Type:

Category:

Method:

Data Sources:

Multi-Chain

Protocol

Dexes

Flash Loans

Extended Method:

Flash loan attack

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Days in Operation:

590

(1.62 Years)

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Nerve Bridge protocols use code that was forked from Saddle.Finance. The Nerve Bridge attacker stole about 900 BNB worth over $537,000.This code contained a vulnerability in how it implemented two related functions: swap and swapunderlying. One target was the Nerve.3pool. This allowed swaps between fUSDT and an LP token of BUSD, USD, and USDC.

The Nerve Bridge attacker exploited this discrepancy using a flash loan attack. By using the swap function, the attacker was able to get an inflated number of LP tokens for the fUSDT they added to the pool. The attacker then removed the liquidity of BUSD from the pool to get BUSD, after which they then used the swapUnderlying function to exchange for more fUSDT than they started with.

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