cve/2017/CVE-2017-12974.md

### [CVE-2017-12974](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12974)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

Nimbus JOSE+JWT before 4.36 proceeds with ECKey construction without ensuring that the public x and y coordinates are on the specified curve, which allows attackers to conduct an Invalid Curve Attack in environments where the JCE provider lacks the applicable curve validation.

### POC

#### Reference
- https://bitbucket.org/connect2id/nimbus-jose-jwt/commits/f3a7a801f0c6b078899fed9226368eb7b44e2b2f
- https://bitbucket.org/connect2id/nimbus-jose-jwt/issues/217/explicit-check-for-ec-public-key-on-curve
- https://bitbucket.org/connect2id/nimbus-jose-jwt/src/master/CHANGELOG.txt

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