CVE-2023-32058 Information

Description

Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8 due to missing overflow check for loop variables by assigning the iterator of a loop to a variable it is possible to overflow the type of the latter. The issue seems to happen only in loops of type for i in range(a a + N) as in loops of type for i in range(start stop) and for i in range(stop) the compiler is able to raise a TypeMismatch when trying to overflow the variable. The problem has been patched in version 0.3.8.

Reference

https://github.com/vyperlang/vyper/security/advisories/GHSA-6r8q-pfpv-7cgj https://github.com/vyperlang/vyper/commit/3de1415ee77a9244eb04bdb695e249d3ec9ed868