CVE-2019-12290
published 2019-10-22CVE-2019-12290: 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…
high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | libidn2 | < libidn2 2.2.0-1 (bookworm) | libidn2 2.2.0-1 (bookworm) |
| gnu | libidn2 | < 2.2.0 | 2.2.0 |
| gnu | libidn2 | >= 0 < 2.2.0-1 | 2.2.0-1 |
| gnu | libidn2 | >= 0 < 2.2.0-1 | 2.2.0-1 |
| gnu | libidn2 | >= 0 < 2.2.0-1 | 2.2.0-1 |
| gnu | libidn2 | >= 0 < 2.2.0-1 | 2.2.0-1 |
| gnu | libidn2 | >= 0 < 2.0.4-1.1ubuntu0.2 | 2.0.4-1.1ubuntu0.2 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
osv7.5HIGH