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Security Advisories

CVE-2019-12290

NVD

https://nvd.nist.gov/vuln/detail/CVE-2019-12290

Severity

7.5

High

CVSS V3

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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.

References

Affected packages

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