CVE-2023-31421
5.9 · MEDIUMOverview
CVE-2023-31421 is a medium-severity vulnerability affecting elastic elastic_beats. It was published on October 26, 2023 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
It was discovered that when acting as TLS clients, Beats, Elastic Agent, APM Server, and Fleet Server did not verify whether the server certificate is valid for the target IP address; however, certificate signature validation is still performed. More specifically, when the client is configured to connect to an IP address (instead of a hostname) it does not validate the server certificate's IP SAN values against that IP address and certificate validation fails, and therefore the connection is not blocked as expected.
Remediation
Check the references section for vendor advisories and patches from elastic. Update elastic_beats 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 |
|---|---|---|---|
| elastic | elastic_beats | 8.0.0 | Affected |
| elastic | elastic_agent | 8.0.0 | Affected |
| elastic | apm_server | 8.0.0 | Affected |
| elastic | elastic_fleet_server | 8.0.0 | Affected |
References
Frequently Asked Questions
What is CVE-2023-31421?
CVE-2023-31421 is a medium-severity vulnerability affecting elastic elastic_beats. It was published on October 26, 2023 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2023-31421?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-31421?
Check the references section for vendor advisories and patches from elastic. Update elastic_beats 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-2023-31421?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-31421 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
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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