ERC 20 Token Standard - was ist das? Was hat Ethereum damit zu tun?
Erc20 Token
Smart contract security firm Quantstamp has given Binance-listed ERC20 tokens a clean bill of health after conducting an audit to determine whether any of the exchange’s listed assets were subject to the recently-discovered batchOverflow and proxyOverflow vulnerabilities.
in late April, confirming that no ERC20 token currently listed on Binance — the world’s largest cryptocurrency exchange — is subject to the vulnerabilities, which allow attackers to essentially print tokens out of thin air.
“Quantstamp shares Binance’s safety-first philosophy in protecting their customers and supports the exchange’s ambitions to create the gold standard in security for the mass adoption of digital currencies, said Richard Ma, CEO of Quantstamp. “In light of the recent vulnerabilities, we are proud to have assisted Binance in its mission to help protect their token holders and the wider Ethereum community.”
, the vulnerability is believed by researchers to affect about a dozen tokens, whose developers utilized a function — batchTransfer — that was not included in the
Attackers were able to exploit the function with a type of integer overflow error, which essentially means that they attempted to store more data in a variable than its data type would allow. Since the contracts did not have a provision to prevent this occurrence, the attackers successfully created an additional supply of tokens far in excess of the token’s original supply.
At least several of these tokens were listed on high-profile cryptocurrency exchanges, so these trading platforms were forced to suspend deposits — OKEx even went so far as to temporarily suspend all ERC20 token deposits while it investigated the issue — and in some cases roll back trades.
all affected tokens and has offered to assist with addressing the issue at cost.
“We won’t be making a profit from our effort to make the Ethereum ecosystem more secure,” the company said.
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Erc20 Token
Josiah is an assistant editor at CCN. A former ancient and medieval literature teacher, he has been reporting on cryptocurrency since 2014. He lives in rural North Carolina with his wife and children. He holds investment positions in bitcoin and other large-cap cryptocurrencies. Follow him on Twitter @Y3llowb1ackbird or email him directly at josiah.wilmoth(at)ccn.com.
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