CVE-2020-27221
CRITICALCVSS 9.8/10EPSS 1.53%
Last modified
CVE-2020-27221 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In Eclipse OpenJ9 up to and including version 0.23, there is potential for a stack-based buffer overflow when the virtual machine or JNI natives are converting from UTF-8 characters to platform encoding.. EPSS estimates a 1.53% chance of exploitation in the next 30 days.
Description
In Eclipse OpenJ9 up to and including version 0.23, there is potential for a stack-based buffer overflow when the virtual machine or JNI natives are converting from UTF-8 characters to platform encoding.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Eclipse | Openj9 | <= 0.23.0 |
References
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=569763Issue Tracking, Vendor Advisory
- https://bugs.eclipse.org/bugs/show_bug.cgi?id=569763Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-27221?
In Eclipse OpenJ9 up to and including version 0.23, there is potential for a stack-based buffer overflow when the virtual machine or JNI natives are converting from UTF-8 characters to platform encoding.
How severe is CVE-2020-27221?
CVE-2020-27221 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.53% probability of exploitation in the next 30 days.
How do I fix CVE-2020-27221?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-27221?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST