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Gentoo Linux: CVE-2019-12290: GNU IDN Library 2: Multiple vulnerabilities

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Gentoo Linux: CVE-2019-12290: GNU IDN Library 2: Multiple vulnerabilities

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
10/22/2019
Created
04/01/2020
Added
03/31/2020
Modified
03/31/2020

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)

  • gentoo-linux-upgrade-net-dns-libidn2

References

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