Dec 2024 - BTC24H Claim System Contract Missing Eligibility Check - $86k (Global)
BTC24H is a new smart contract ERC20 token launched on the Polygon blockchain.
"An access control flaw on Polygon led to a loss of ~$85.7K. Attacker exploited the smart contract’s vulnerability to drain tokens"
"The Lock contract's claim function does not check if msg.sender is eligible to claim. This flaw enables anyone to claim BTC24H tokens after the specified date."
Most source report $85.7k was lost.
"BTC24H (BTC24H) is suspected to have been attacked on Polygon, with an estimated loss of $85,700."
Further Analysis
BTC24H, a new ERC20 smart contract token launched on the Polygon blockchain, was compromised due to an access control vulnerability in its Lock contract. The flaw in the contract’s claim function allowed unauthorized users to claim BTC24H tokens after a specified date without verification of eligibility. This security breach led to an estimated loss of approximately $85,700 worth of tokens, as attackers exploited the vulnerability to drain the funds. The BTC24H project does not appear to have any social media or website, and it is unclear how the project is responding to the loss situation.
How Could This Have Been Prevented?
More Cryptocurrency Exchange Hacks/Scams/Frauds
GemPad Reentrancy Exploit In Lock Contract > > < < Decentralized Finance (DCF) Flash Loan Price Manipulation Attack
Sources/Further Reading
Polygon PoS Chain Transaction Hash (Txhash) Details | PolygonScan
(Dec 31)
@0xCommitAudits Twitter (Dec 31)
@TenArmorAlert Twitter (Dec 31)
@IncentiveFi Twitter (Dec 31)
BTC24H | Address 0xea4b5c48a664501691b2ecb407938ee92d389a6f | PolygonScan
(Dec 31)
Polygon PoS Chain Transaction Hash (Txhash) Details | PolygonScan
(Dec 31)
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