CVE ID:	CVE-2019-12290
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.
Test IDs:	1.3.6.1.4.1.25623.1.1.2.2020.1161   1.3.6.1.4.1.25623.1.1.2.2020.1338   1.3.6.1.4.1.25623.1.0.877042   1.3.6.1.4.1.25623.1.1.2.2023.1735   1.3.6.1.4.1.25623.1.0.877246   1.3.6.1.4.1.25623.1.0.877289   1.3.6.1.4.1.25623.1.0.877079   1.3.6.1.4.1.25623.1.0.877044
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2019-12290 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ONG3GJRRJO35COPGVJXXSZLU4J5Y42AT/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RSI4TI2JTQWQ3YEUX5X36GTVGKO4QKZ5/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3UFT76Y7OSGPZV3EBEHD6ISVUM3DLARM/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KXDKYWFV6N2HHVSE67FFDM7G3FEL2ZNE/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6ZXL2RDNQRAHCMKWPOMJFKYJ344X4HL/ https://security.gentoo.org/glsa/202003-63 https://gitlab.com/libidn/libidn2/commit/241e8f486134793cb0f4a5b0e5817a97883401f5 https://gitlab.com/libidn/libidn2/merge_requests/71 SuSE Security Announcement: openSUSE-SU-2019:2611 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html SuSE Security Announcement: openSUSE-SU-2019:2613 (Google Search) http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html https://usn.ubuntu.com/4168-1/