ChainBleedv0.1 · open intel
← back to feed·BSCFLASHLOAN2021-06-23 · 4y ago
Incident · SLOWMIST

Eleven Finance

Flash loan attack
Estimated loss
$300.0K
VERDICT —UNRATED
Verdict pending. Auto-ingested incidents are reviewed before a public verdict is rendered.
▰ METHOD
FLASHLOAN
FLASHLOANBYTECODE CATCHABLEAI SCANNABLE
Root cause

Root-cause analysis not yet published. The incident description below contains all currently available signal — review the attack transaction directly for definitive forensics.

▰ PROOF OF CONCEPT
DEFIHACKLABS
src/test/2021-06/Eleven_exp.sol
view forked test on github ↗

Reproducible Foundry test fork from SunWeb3Sec/DeFiHackLabs. Clone the repo, run forge test against the file path above, and replay the exploit against a mainnet fork at the historical block. Use for reproduction only — not for live targets.

Forensic narrative

Nerve Finance, a stablecoin trading platform based on the Binance Smart Chain (BSC), tweeted that the Nerve-related machine gun pool in the revenue aggregator Eleven Finance have been attacked by sparks. After analysis, the reason for the exploit is that the emergencyBurn() function does not calculate the balance correctly and does not execute the destruction. On September 30th, hackers have returned approximately $4.5 million in stolen funds. Attack method (per SlowMist): Flash loan attack. Reported loss: $ 300,000.

Primary source
https://elevenfinance.medium.com/eleven-finance-nrv-vault-exploit-and-loss-of-funds-a-post-mortem-437a79ded743
Sourced from
slowmist
Technical record
chain
bsc
protocol
Eleven Finance
bug_class
flashloan
date_occurred
2021-06-23
loss_usd
$300,000
source_id
sm:eleven-finance::2021-06-23
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