CVE-2019-12290
7.5 · HIGHOverview
CVE-2019-12290 is a high-severity vulnerability affecting gnu libidn2. It was published on October 22, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from gnu. Update libidn2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| gnu | libidn2 | >= 0, < 2.2.0 | Affected |
References
Frequently Asked Questions
What is CVE-2019-12290?
CVE-2019-12290 is a high-severity vulnerability affecting gnu libidn2. It was published on October 22, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2019-12290?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-12290?
Check the references section for vendor advisories and patches from gnu. Update libidn2 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-12290?
CyberStrike's AI-powered security agents can automatically detect CVE-2019-12290 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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