Home

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.

Risk Information

Base Score
7.5
MODERATE
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS Score
Exploitation Probability
2.892

Associated Vulnerability

VulnerabilityOS Platform
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) idn2_2.0.5-1ubuntu0.3_i386.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) idn2_2.0.5-1ubuntu0.3_amd64.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) idn2_2.0.4-1.1ubuntu0.2_i386.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) idn2_2.0.4-1.1ubuntu0.2_amd64.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) libidn2-0_2.0.5-1ubuntu0.3_i386.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) libidn2-0_2.0.5-1ubuntu0.3_amd64.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) libidn2-0_2.0.4-1.1ubuntu0.2_i386.debLinux
Internationalized domain names (IDNA2008/TR46) command line tool (USN-4168-1) libidn2-0_2.0.4-1.1ubuntu0.2_amd64.debLinux
libidn2 Security Update (ALAS-2019-1373) idn2-2.3.0-1.amzn2.x86_64.rpmLinux
libidn2 Security Update (ALAS-2019-1373) libidn2-2.3.0-1.amzn2.i686.rpmLinux
libidn2 Security Update (ALAS-2019-1373) libidn2-2.3.0-1.amzn2.x86_64.rpmLinux
libidn2 Security Update (ALAS-2019-1373) libidn2-devel-2.3.0-1.amzn2.x86_64.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234