cve/2024/CVE-2024-32646.md

### [CVE-2024-32646](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-32646)
![](https://img.shields.io/static/v1?label=Product&message=vyper&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%3D%200.3.10%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-20%3A%20Improper%20Input%20Validation&color=brighgreen)

### Description

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.

### POC

#### Reference
- https://github.com/vyperlang/vyper/security/advisories/GHSA-r56x-j438-vw5m

#### Github
No PoCs found on GitHub currently.