CVE-2019-12290

Libidn2 (GNU libidn2) before 2.2.0 fails RFC3490 roundtrip checks when converting A-labels to U-labels, enabling domain impersonation. Affected: libidn2 (prior to 2.2.0). Remediation: upgrade to 2.2.0 or newer (advisories show updates to 2.3.x). Connected advisories also reference CVE-2019-18224 ...