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CVE-2018-12703

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CVE-2018-12703

Published: Jun 25, 2018

Modified: Aug 5, 2024

PUBLISHED

Description

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."

VendorProductVersions

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affected
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