CVE-2020-15166
7.5 · HIGHOverview
CVE-2020-15166 is a high-severity vulnerability affecting zeromq libzmq. It was published on September 11, 2020 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
In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability. Users with TCP transport public endpoints, even with CURVE/ZAP enabled, are impacted. If a raw TCP socket is opened and connected to an endpoint that is fully configured with CURVE/ZAP, legitimate clients will not be able to exchange any message. Handshakes complete successfully, and messages are delivered to the library, but the server application never receives them. This is patched in version 4.3.3.
Remediation
Check the references section for vendor advisories and patches from zeromq. Update libzmq 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 |
|---|---|---|---|
| zeromq | libzmq | >= 0, < 4.3.3 | Affected |
References
Frequently Asked Questions
What is CVE-2020-15166?
CVE-2020-15166 is a high-severity vulnerability affecting zeromq libzmq. It was published on September 11, 2020 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2020-15166?
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-2020-15166?
Check the references section for vendor advisories and patches from zeromq. Update libzmq 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-2020-15166?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-15166 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.
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