CVE-2018-12703

The approveAndCallcode function of a smart contract implementation for Block 18 (18T), an tradable Ethereum ERC20 token, allows attackers to steal assets…

published June 25, 2018

CVSS
—
EPSS
1%
Percentile
65.2
In the wild
Unconfirmed
What it is

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."

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01094 · 65.2th percentile
Published
2018-06-25T10:00Z
EPSS history
Timeline
  • 25 JUN 10:00Z
    The approveAndCallcode function of a smart contract implementation for Block 18 (18T), an tradable Ethereum ERC20 token, allows attackers to steal assets…
    cvelistv5