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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Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2019-10-22T15:14:06
Updated: 2024-08-04T23:17:39.504Z
Reserved: 2019-05-22T00:00:00
Link: CVE-2019-12290
Vulnrichment
No data.
NVD
Status : Modified
Published: 2019-10-22T16:15:10.877
Modified: 2024-11-21T04:22:33.913
Link: CVE-2019-12290
Redhat
No data.