cve/2024/CVE-2024-21664.md

### [CVE-2024-21664](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-21664)
![](https://img.shields.io/static/v1?label=Product&message=jwx&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3E%3D%202.0.0%2C%20%3C%202.0.19%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-476%3A%20NULL%20Pointer%20Dereference&color=brighgreen)

### Description

jwx is a Go module implementing various JWx (JWA/JWE/JWK/JWS/JWT, otherwise known as JOSE) technologies. Calling `jws.Parse` with a JSON serialized payload where the `signature` field is present while `protected` is absent can lead to a nil pointer dereference. The vulnerability can be used to crash/DOS a system doing JWS verification. This vulnerability has been patched in versions 2.0.19 and 1.2.28.

### POC

#### Reference
- https://github.com/lestrrat-go/jwx/security/advisories/GHSA-pvcr-v8j8-j5q3

#### Github
- https://github.com/fkie-cad/nvd-json-data-feeds