{"id":"UBUNTU-CVE-2018-12121","details":"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.","modified":"2025-09-08T16:44:53Z","published":"2018-11-28T17:29:00Z","upstream":["CVE-2018-12121"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-12121"},{"type":"REPORT","url":"https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-12121"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-12121"}],"affected":[{"package":{"name":"nodejs","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/nodejs@0.10.25~dfsg2-2ubuntu1.2+esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.15~dfsg1-4","0.10.21~dfsg1-1","0.10.22~dfsg1-2","0.10.23~dfsg1-1","0.10.23~dfsg1-2","0.10.23~dfsg1-3","0.10.24~dfsg1-1","0.10.25~dfsg2-2","0.10.25~dfsg2-2ubuntu1","0.10.25~dfsg2-2ubuntu1.2","0.10.25~dfsg2-2ubuntu1.2+esm1","0.10.25~dfsg2-2ubuntu1.2+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"0.10.25~dfsg2-2ubuntu1.2+esm2","binary_name":"nodejs"},{"binary_version":"0.10.25~dfsg2-2ubuntu1.2+esm2","binary_name":"nodejs-dev"},{"binary_version":"0.10.25~dfsg2-2ubuntu1.2+esm2","binary_name":"nodejs-legacy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12121.json"}},{"package":{"name":"nodejs","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/nodejs@4.2.6~dfsg-1ubuntu4.2+esm3?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.25~dfsg2-2ubuntu1","4.2.2~dfsg-1","4.2.3~dfsg-1","4.2.4~dfsg-1ubuntu1","4.2.4~dfsg-2","4.2.6~dfsg-1ubuntu1","4.2.6~dfsg-1ubuntu4","4.2.6~dfsg-1ubuntu4.1","4.2.6~dfsg-1ubuntu4.2","4.2.6~dfsg-1ubuntu4.2+esm1","4.2.6~dfsg-1ubuntu4.2+esm2","4.2.6~dfsg-1ubuntu4.2+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"4.2.6~dfsg-1ubuntu4.2+esm3","binary_name":"nodejs"},{"binary_version":"4.2.6~dfsg-1ubuntu4.2+esm3","binary_name":"nodejs-dev"},{"binary_version":"4.2.6~dfsg-1ubuntu4.2+esm3","binary_name":"nodejs-legacy"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12121.json"}},{"package":{"name":"nodejs","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/nodejs@8.10.0~dfsg-2ubuntu0.4+esm6?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.11.4~dfsg-1ubuntu1","6.11.4~dfsg-1ubuntu2","6.12.0~dfsg-1ubuntu1","6.12.0~dfsg-2ubuntu1","6.12.0~dfsg-2ubuntu2","8.10.0~dfsg-2","8.10.0~dfsg-2ubuntu0.2","8.10.0~dfsg-2ubuntu0.3","8.10.0~dfsg-2ubuntu0.4","8.10.0~dfsg-2ubuntu0.4+esm1","8.10.0~dfsg-2ubuntu0.4+esm2","8.10.0~dfsg-2ubuntu0.4+esm3","8.10.0~dfsg-2ubuntu0.4+esm4","8.10.0~dfsg-2ubuntu0.4+esm5","8.10.0~dfsg-2ubuntu0.4+esm6"],"ecosystem_specific":{"binaries":[{"binary_version":"8.10.0~dfsg-2ubuntu0.4+esm6","binary_name":"nodejs"},{"binary_version":"8.10.0~dfsg-2ubuntu0.4+esm6","binary_name":"nodejs-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-12121.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}