CVE-2019-12290

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Summary

CVECVE-2019-12290
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-10-22 16:15:10 UTC
Updated2026-10-14 07:16:45 UTC
DescriptionGNU 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Problem Types: CWE-20 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:L/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Gnu Libidn2 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[security-announce] openSUSE-SU-2019:2611-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
[SECURITY] Fedora 30 Update: libidn2-2.3.0-1.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
GNU IDN Library 2: Multiple vulnerabilities (GLSA 202003-63) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
[SECURITY] Fedora 30 Update: mingw-libidn2-2.3.0-1.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 31 Update: libidn2-2.3.0-1.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
USN-4168-1: Libidn2 vulnerabilities | Ubuntu security notices af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com
[security-announce] openSUSE-SU-2019:2613-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
Perform A-Label roundtrip for lookup functions by default (!71) · Merge Requests · libidn / libidn2 · GitLab af854a3a-2127-422b-91ae-364da2661108 gitlab.com Patch, Third Party Advisory
Update NEWS for CVE-2019-12290 (614117ef) · Commits · libidn / libidn2 · GitLab af854a3a-2127-422b-91ae-364da2661108 gitlab.com Third Party Advisory
Perform A-Label roundtrip for lookup functions by default (241e8f48) · Commits · libidn / libidn2 · GitLab af854a3a-2127-422b-91ae-364da2661108 gitlab.com Patch, Third Party Advisory
[SECURITY] Fedora 31 Update: mingw-libidn2-2.3.0-1.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 29 Update: mingw-libidn2-2.3.0-1.fc29 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[SECURITY] Fedora 30 Update: libidn2-2.3.0-1.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 31 Update: mingw-libidn2-2.3.0-1.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 30 Update: mingw-libidn2-2.3.0-1.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 29 Update: mingw-libidn2-2.3.0-1.fc29 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 31 Update: libidn2-2.3.0-1.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 296078 Oracle Solaris 11.4 Support Repository Update (SRU) 16.4.0 Missing (CPUOCT2019)
  • 500300 Alpine Linux Security Update for libidn2
  • 504067 Alpine Linux Security Update for libidn2
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)

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