cve/2019/CVE-2019-12290.md

CVE-2019-12290

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