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CVE-2018-12121

7.5 · HIGH

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Denial of Service with large HTTP headers: By using a combination of many requests with maximum sized headers (almost 80 K…

Published Nov 28, 2018CWE-400EPSS 10.21%

Overview

CVE-2018-12121 is a high-severity vulnerability. It was published on November 28, 2018 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

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Denial of Service with large HTTP headers: By using a combination of many requests with maximum sized headers (almost 80 KB per connection), and carefully timed completion of the headers, it is possible to cause the HTTP server to abort from heap allocation failure. Attack potential is mitigated by the use of a load balancer or other proxy layer.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refwww.securityfocus.com/bid/106043Refaccess.redhat.com/errata/RHSA-2019:1821Refaccess.redhat.com/errata/RHSA-2019:2258Refaccess.redhat.com/errata/RHSA-2019:3497Refnodejs.org/en/blog/vulnerability/november-2018-security-releases/Refsecurity.gentoo.org/glsa/202003-48Refwww.securityfocus.com/bid/106043Refaccess.redhat.com/errata/RHSA-2019:1821Refaccess.redhat.com/errata/RHSA-2019:2258Refaccess.redhat.com/errata/RHSA-2019:3497

How CyberStrike helps

Frequently asked questions

What is CVE-2018-12121?

CVE-2018-12121 is a high-severity vulnerability. It was published on November 28, 2018 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2018-12121?

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-2018-12121?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2018-12121?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-12121 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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