CVE-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 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.

Link	Resource
https://gitlab.com/libidn/libidn2/merge_requests/71	Patch Third Party Advisory
https://gitlab.com/libidn/libidn2/commit/241e8f486134793cb0f4a5b0e5817a97883401f5	Patch Third Party Advisory
https://gitlab.com/libidn/libidn2/commit/614117ef6e4c60e1950d742e3edf0a0ef8d389de	Third Party Advisory
https://usn.ubuntu.com/4168-1/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6ZXL2RDNQRAHCMKWPOMJFKYJ344X4HL/
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/RSI4TI2JTQWQ3YEUX5X36GTVGKO4QKZ5/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KXDKYWFV6N2HHVSE67FFDM7G3FEL2ZNE/
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ONG3GJRRJO35COPGVJXXSZLU4J5Y42AT/
https://security.gentoo.org/glsa/202003-63

Configuration 1

cpe:2.3:a:gnu:libidn2:*:*:*:*:*:*:*:*

---

Published : 2019-10-22 04:15

Updated : 2019-10-29 07:15

---

NVD link : CVE-2019-12290

Mitre link : CVE-2019-12290

No products.

CWE-20