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Fencer Intel
high 7.5

CVE-2018-12121 in the critical feed json

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 combinatio…

published 7y ago modified last mo. also EUVD-2018-4099

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.2%
EPSS 10.2% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

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.

Patch / fix

  • nodejs node.js 6.15.0, 8.14.0, 10.14.0, 11.3.0
  • nodejs Debian 14, Debian 13, Debian 12 10.15.0~dfsg-6

debian advisories DEBIAN-CVE-2018-12121

  • rh-nodejs10-nodejs RHEL 3 SOFTWARE_COLLECTIONS 10.16.3-3.el7
  • rh-nodejs10 RHEL 3 SOFTWARE_COLLECTIONS 3.2-3.el7
  • rh-nodejs10-npm RHEL 3 SOFTWARE_COLLECTIONS 6.9.0-10.16.3.3.el7
  • rh-nodejs10-runtime RHEL 3 SOFTWARE_COLLECTIONS 3.2-3.el7
  • rh-nodejs10-scldevel RHEL 3 SOFTWARE_COLLECTIONS 3.2-3.el7
  • http-parser RHEL 7 2.7.1-8.el7
  • http-parser RHEL 8 2.8.0-5.el8
  • rh-nodejs8-nodejs RHEL 3 SOFTWARE_COLLECTIONS 8.16.0-1.el7

red hat advisories RHSA-2019:2939RHSA-2019:2258RHSA-2019:3497RHSA-2019:1821

  • nodejs6 SLE Module for Web and Scripting 12, OpenStack Cloud Crowbar 8, OpenStack Cloud 7 +1 more 6.16.0-11.21.1
  • nodejs8 SLE Module for Web and Scripting 15 8.15.0-3.11.1
  • nodejs4 SLE Module for Web and Scripting 12, Enterprise Storage 4 4.9.1-15.17.1
  • firefox-atk SLES 11 SP4-LTSS 2.26.1-2.8.4
  • mozilla-nss SLES 11 SP4-LTSS 3.45-38.9.3
  • firefox-gtk3 SLES 11 SP4-LTSS 3.10.9-2.15.3
  • mozilla-nspr SLES 11 SP4-LTSS 4.21-29.6.1
  • firefox-cairo SLES 11 SP4-LTSS 1.15.10-2.13.4

suse advisories SUSE-SU-2019:14246-1SUSE-SU-2019:0395-1SUSE-SU-2019:0118-1SUSE-SU-2019:0117-1

  • nodejs8 openSUSE Leap 15.0 8.15.0-lp150.2.9.1

opensuse advisories openSUSE-SU-2019:0089-1

  • nodejs Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 10.14.0-r0
  • nodejs Alpine 3.8 8.14.0-r0
  • nodejs-current Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 11.3.0-r0

alpine advisories ALPINE-CVE-2018-12121

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2018-12121 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-12121 updated cvss 7.5

nodejs: Denial of Service with large HTTP headers

  • Red Hat OpenShift Container Platform 3.2 nodejs Red Hat OpenShift Container Platform 3.3 nodejs Red Hat OpenShift Container Platform 3.4 nodejs Red Hat OpenShift Container Platform 3.5 nodejs Red Hat OpenShift Container Platform 3.6 nodejs Red Hat OpenShift Container Platform 3.7 nodejs
    affected: no fix planned “Out of support scope”
  • Red Hat OpenShift Container Platform 3.9 nodejs Red Hat OpenShift Container Platform 3.10 nodejs
    affected: no fix available “Fix deferred”
  • Red Hat Software Collections rh-nodejs4-http-parser, rh-nodejs6-http-parser
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux AppStream (v. 8) http-parser 2.8.0-5.el8
    fixed: vendor fix RHSA-2019:3497
  • Red Hat Enterprise Linux Client (v. 7) http-parser 2.7.1-8.el7 Red Hat Enterprise Linux Client Optional (v. 7) http-parser-devel 2.7.1-8.el7, http-parser-debuginfo 2.7.1-8.el7 Red Hat Enterprise Linux ComputeNode (v. 7) http-parser 2.7.1-8.el7 Red Hat Enterprise Linux ComputeNode Optional (v. 7) http-parser-devel 2.7.1-8.el7, http-parser-debuginfo 2.7.1-8.el7 Red Hat Enterprise Linux Server (v. 7) http-parser 2.7.1-8.el7 Red Hat Enterprise Linux Server Optional (v. 7) http-parser-devel 2.7.1-8.el7, http-parser-debuginfo 2.7.1-8.el7
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 7) http-parser 2.7.1-8.el7 Red Hat Enterprise Linux Workstation Optional (v. 7) http-parser-devel 2.7.1-8.el7, http-parser-debuginfo 2.7.1-8.el7
    fixed: vendor fix RHSA-2019:2258
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-nodejs10 3.2-3.el7, rh-nodejs10-runtime 3.2-3.el7, rh-nodejs10-scldevel 3.2-3.el7, rh-nodejs8-nodejs 8.16.0-1.el7, rh-nodejs10-nodejs 10.16.3-3.el7, rh-nodejs8-npm 6.4.1-8.16.0.1.el7, +1 more
    fixed: vendor fix RHSA-2019:2939
  • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) rh-nodejs8-nodejs 8.16.0-1.el7, rh-nodejs8-npm 6.4.1-8.16.0.1.el7
    fixed: vendor fix RHSA-2019:1821
  • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) rh-nodejs10 3.2-3.el7, rh-nodejs10-runtime 3.2-3.el7, rh-nodejs10-scldevel 3.2-3.el7, rh-nodejs8-nodejs 8.16.0-1.el7, rh-nodejs10-nodejs 10.16.3-3.el7, rh-nodejs8-npm 6.4.1-8.16.0.1.el7, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-nodejs10 3.2-3.el7, rh-nodejs10-runtime 3.2-3.el7, rh-nodejs10-scldevel 3.2-3.el7, rh-nodejs8-nodejs 8.16.0-1.el7, rh-nodejs10-nodejs 10.16.3-3.el7, rh-nodejs8-npm 6.4.1-8.16.0.1.el7, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-nodejs10 3.2-3.el7, rh-nodejs10-runtime 3.2-3.el7, rh-nodejs10-scldevel 3.2-3.el7, rh-nodejs10-nodejs 10.16.3-3.el7, rh-nodejs10-npm 6.9.0-10.16.3.3.el7 Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-nodejs10 3.2-3.el7, rh-nodejs10-runtime 3.2-3.el7, rh-nodejs10-scldevel 3.2-3.el7, rh-nodejs8-nodejs 8.16.0-1.el7, rh-nodejs10-nodejs 10.16.3-3.el7, rh-nodejs8-npm 6.4.1-8.16.0.1.el7, +1 more
    fixed: vendor fix RHSA-2019:2939
show 1 more
  • Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, nodejs-nodemon, nodejs-full-i18n, nodejs-packaging, +1 more Red Hat OpenShift Application Runtimes nodejs
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last mo.

Exploit prediction

10.21% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • The Node.js Project Node.js

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.