vulnerability
Ubuntu: USN-4168-1 (CVE-2019-12290): Libidn2 vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:P/A:N) | Oct 22, 2019 | Oct 30, 2019 | Mar 22, 2023 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
Oct 22, 2019
Added
Oct 30, 2019
Modified
Mar 22, 2023
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.
Solution(s)
ubuntu-upgrade-idn2ubuntu-upgrade-libidn2-0
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