Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.025
EPSS Ranking 84.7%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html
- https://gitlab.com/libidn/libidn2/commit/241e8f486134793cb0f4a5b0e5817a97883401f5
- https://gitlab.com/libidn/libidn2/commit/614117ef6e4c60e1950d742e3edf0a0ef8d389de
- https://gitlab.com/libidn/libidn2/merge_requests/71
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFT76Y7OSGPZV3EBEHD6ISVUM3DLARM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KXDKYWFV6N2HHVSE67FFDM7G3FEL2ZNE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ONG3GJRRJO35COPGVJXXSZLU4J5Y42AT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSI4TI2JTQWQ3YEUX5X36GTVGKO4QKZ5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6ZXL2RDNQRAHCMKWPOMJFKYJ344X4HL/
- https://security.gentoo.org/glsa/202003-63
- https://usn.ubuntu.com/4168-1/
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html
- https://gitlab.com/libidn/libidn2/commit/241e8f486134793cb0f4a5b0e5817a97883401f5
- https://gitlab.com/libidn/libidn2/commit/614117ef6e4c60e1950d742e3edf0a0ef8d389de
- https://gitlab.com/libidn/libidn2/merge_requests/71
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFT76Y7OSGPZV3EBEHD6ISVUM3DLARM/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KXDKYWFV6N2HHVSE67FFDM7G3FEL2ZNE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ONG3GJRRJO35COPGVJXXSZLU4J5Y42AT/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSI4TI2JTQWQ3YEUX5X36GTVGKO4QKZ5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6ZXL2RDNQRAHCMKWPOMJFKYJ344X4HL/
- https://security.gentoo.org/glsa/202003-63
- https://usn.ubuntu.com/4168-1/
Products affected by CVE-2019-12290
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cpe:2.3:a:gnu:libidn2:0.10
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cpe:2.3:a:gnu:libidn2:0.11
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cpe:2.3:a:gnu:libidn2:0.12
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cpe:2.3:a:gnu:libidn2:0.13
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cpe:2.3:a:gnu:libidn2:0.14
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cpe:2.3:a:gnu:libidn2:0.15
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cpe:2.3:a:gnu:libidn2:0.16
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cpe:2.3:a:gnu:libidn2:0.3
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cpe:2.3:a:gnu:libidn2:0.4
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cpe:2.3:a:gnu:libidn2:0.5
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cpe:2.3:a:gnu:libidn2:0.6
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cpe:2.3:a:gnu:libidn2:0.7
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cpe:2.3:a:gnu:libidn2:0.8
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cpe:2.3:a:gnu:libidn2:0.9
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cpe:2.3:a:gnu:libidn2:2.0.0
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cpe:2.3:a:gnu:libidn2:2.0.1
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cpe:2.3:a:gnu:libidn2:2.0.2
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cpe:2.3:a:gnu:libidn2:2.0.3
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cpe:2.3:a:gnu:libidn2:2.0.4
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cpe:2.3:a:gnu:libidn2:2.0.5
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cpe:2.3:a:gnu:libidn2:2.1.0
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cpe:2.3:a:gnu:libidn2:2.1.1