CVE-2018-12121 Denial of service in Node.js

What is CVE-2018-12121?

CVE-2018-12121 is a high-severity denial of service vulnerability in Nodejs Node.js, published on 28 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-400

Which versions are affected by CVE-2018-12121?

It affects 8 products.

Products include Nodejs Node.js, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 2 more.

How do I fix CVE-2018-12121?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2018-12121 being exploited?

There is no known exploitation of CVE-2018-12121 in the wild and no public exploit code.

Other vulnerabilities in Nodejs Node.js

• CVE-2023-32002 Security feature bypass in Node Critical 9.8
• CVE-2016-6303 Integer overflow in n/a Critical 9.8
• CVE-2017-15896 Security feature bypass in Node.js Critical 9.1
• CVE-2018-7160 Server-side request forgery in Node.js High 8.8
• CVE-2018-12120 Misconfiguration in Node.js High 8.1

All Nodejs Node.js vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2018-12121, CLEANSTART-2026-RU92085, CLEANSTART-2026-ZB96802, DEBIAN-CVE-2018-12121, GHSA-2p2c-vwq7-7vg6, RHSA-2019:3497 and 1 more.