A flaw was found in Node.js versions before 6.15.0, 8.14.0, 10.14.0 and 11.3.0. A 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. References: https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/
Created nodejs tracking bugs for this issue: Affects: epel-all [bug 1661004] Affects: fedora-all [bug 1661003]
Upstream fix: (master) https://github.com/nodejs/node/commit/18603524 (node.js 6) https://github.com/nodejs/node/commit/92231a56
Note: The original fix, reducing the maximum header length down to 8K (instead of 80K) has been found to lead to regressions. A 2nd commit added the ability to modify the maximum header size on the fly : Upstream fixes: For node.js : + https://github.com/nodejs/node/commit/cdcb1b77 + https://github.com/nodejs/node/commit/632f2633 For http-parser: + https://github.com/nodejs/http-parser/commit/0ae8d93f
Statement: The nodejs RPMs shipped in Red Hat OpenShift Container Platform (OCP) versions 3.6 through 3.10 are vulnerable to this flaw because they contain the affected code. Later versions of OCP used nodejs RPMs delivered from Red Hat Software Collections and Red Hat Enterprise Linux channels.
This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS Via RHSA-2019:1821 https://access.redhat.com/errata/RHSA-2019:1821
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2018-12121
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2019:2258 https://access.redhat.com/errata/RHSA-2019:2258
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2019:3497 https://access.redhat.com/errata/RHSA-2019:3497