San evilReflex

Scheda tecnica

Divulgata il

23 giugno 2018

CVE

CVE-2018-12703CVE-2018-12702

The approveAndCallcode function of a smart contract implementation for Block 18 (18T), an tradable Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the "evilReflex" issue. NOTE: a PeckShield disclosure states "some researchers have independently discussed the mechanism of such vulnerability."

Fonti: peckshield.com · web.archive.org