### [CVE-2017-2666](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2666)
![](https://img.shields.io/static/v1?label=Product&message=undertow&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20n%2Fa%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-444&color=brighgreen)

### Description

It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/tafamace/CVE-2017-2666