cve/2019/CVE-2019-12290.md

### [CVE-2019-12290](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12290)
![](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

GNU libidn2 before 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels. This makes it possible in some circumstances for one domain to impersonate another. By creating a malicious domain that matches a target domain except for the inclusion of certain punycoded Unicode characters (that would be discarded when converted first to a Unicode label and then back to an ASCII label), arbitrary domains can be impersonated.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/PajakAlexandre/wik-dps-tp02
- https://github.com/garethr/snykout