HIGH
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
Published Oct 22, 2019
7.5
HIGHCVSS 3.1
EPSS 2.99%
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.
Affected products
Remediation
No remediation recorded yet.
Weaknesses (1)
References (13)
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00008.html vendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00009.html vendor-advisoryx_refsource_SUSE
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-3931 Advisory
- https://gitlab.com/libidn/libidn2/commit/241e8f486134793cb0f4a5b0e5817a97883401f5 x_refsource_MISCPatchThird Party Advisory
- https://gitlab.com/libidn/libidn2/commit/614117ef6e4c60e1950d742e3edf0a0ef8d389de x_refsource_CONFIRMThird Party Advisory
- https://gitlab.com/libidn/libidn2/merge_requests/71 x_refsource_MISCPatchThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFT76Y7OSGPZV3EBEHD6ISVUM3DLARM/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KXDKYWFV6N2HHVSE67FFDM7G3FEL2ZNE/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ONG3GJRRJO35COPGVJXXSZLU4J5Y42AT/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSI4TI2JTQWQ3YEUX5X36GTVGKO4QKZ5/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6ZXL2RDNQRAHCMKWPOMJFKYJ344X4HL/ vendor-advisoryx_refsource_FEDORA
- https://security.gentoo.org/glsa/202003-63 vendor-advisoryx_refsource_GENTOO
- https://usn.ubuntu.com/4168-1/ vendor-advisoryx_refsource_UBUNTU
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Oct 22, 2019
Updated Aug 4, 2024
Reserved May 22, 2019
Link CVE-2019-12290
CISA Vulnrichment
Updated n/a
ENISA EUVD
EUVD-2019-3931 Assigner mitre
Published Oct 22, 2019
Updated Aug 4, 2024
Exploited since n/a
Link EUVD-2019-3931