cve/2024/CVE-2024-38358.md

### [CVE-2024-38358](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-38358)
![](https://img.shields.io/static/v1?label=Product&message=wasmer&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%204.3.2%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-22%3A%20Improper%20Limitation%20of%20a%20Pathname%20to%20a%20Restricted%20Directory%20('Path%20Traversal')&color=brighgreen)

### Description

Wasmer is a web assembly (wasm) Runtime supporting WASIX, WASI and Emscripten. If the preopened directory has a symlink pointing outside, WASI programs can traverse the symlink and access host filesystem if the caller sets both `oflags::creat` and `rights::fd_write`. Programs can also crash the runtime by creating a symlink pointing outside with `path_symlink` and `path_open`ing the link. This issue has been addressed in commit `b9483d022` which has been included in release version 4.3.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

### POC

#### Reference
- https://github.com/wasmerio/wasmer/security/advisories/GHSA-55f3-3qvg-8pv5

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