How severe is CVE-2019-12290?

This vulnerability has a severity rating of HIGH with a CVSS score of 7.5 out of 10.

What type of vulnerability is CVE-2019-12290?

This is classified as CWE-20, which is a common weakness in software security.

CVE-2019-12290

HIGH Year: 2019

CVSS v3 Score

7.5

High

CVSS v2 Score

5.0

Medium

Weakness Type

CWE-20

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Vulnerability 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.

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CVSS:7.5(High)

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