CVE-2024-32646

Date: April 25, 2024

Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the "slice" builtin can result in a double eval vulnerability when the buffer argument is either "msg.data", "self.code" or "<address>.code" and either the "start" or "length" arguments have side-effects. It can be easily triggered only with the versions "<0.3.4" as "0.3.4" introduced the unique symbol fence. No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions are available.

Language: Python