CVE Catalog

CVE-2019-12290

High
Published: Translated: NVD NIST

Summary

GNU libidn2 before version 2.2.0 fails to perform the roundtrip checks specified in RFC3490 Section 4.2 when converting A-labels to U-labels, allowing domain impersonation in some circumstances. An attacker can create a malicious domain that matches a target domain except for certain characters.

Risk Assessment

The organization is at risk of phishing attacks and domain impersonation, which could lead to data theft or financial fraud.

Recommendation

Immediately update the GNU libidn2 library to version 2.2.0 or later, which includes a fix for this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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 inclusi

Vulnerability data from NVD (NIST) · CISA KEV · EPSS