CVE-2019-12290
7.5
HIGH
CVSS 3.1
EPSS 1.6%
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.
How to fix CVE-2019-12290
To remediate CVE-2019-12290, upgrade the affected package to a fixed version below.
- —upgrade to 2.2.0-r0 or later
- —upgrade to 2.2.0-1 or later
Is CVE-2019-12290 being exploited?
Low — EPSS is 1.6%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.2.0-r0
- from 0, < 2.2.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |