VDB
DEBIAN-CVE-2019-12290
DEBIAN-CVE-2019-12290
PUBLISHED
CVSS 7.5 HIGH
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.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | libidn2 | 0, 0, 0 |
| Debian:11 | libidn2 | 0, 0, 0 |
| Debian:13 | libidn2 | 0, 0, 0 |
| Debian:12 | libidn2 | 0, 0, 0 |
Timeline
- Oct 22, 2019 CVE Published
- Apr 28, 2026 CVE Updated