⬇ Download holy card: ·
Saint evilReflex
Hagiography in preparation at the scriptorium.
Feast day June 23
Technical record
- Disclosed on
- June 23 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."
Sources: peckshield.com · web.archive.org