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
Configurations
History
07 Nov 2023, 03:03
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Information
Published : 2019-10-22 16:15
Updated : 2024-02-28 17:28
NVD link : CVE-2019-12290
Mitre link : CVE-2019-12290
CVE.ORG link : CVE-2019-12290
JSON object : View
Products Affected
gnu
- libidn2
CWE
CWE-20
Improper Input Validation