Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Slowloris HTTP Denial of Service: An attacker can cause a Denial

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• nodejs node.js6.0.0 and later · before 6.15.1
• nodejs node.js8.0.0 and later · before 8.14.0
• nodejs node.js10.0.0 and later · before 10.14.0
• nodejs node.js11.0.0 and later · before 11.3.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (nodejs). Independent of NVD's CPE analysis and usually ahead of it.

• The Node.js Project Node.js

  • All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2019-15605HTTP request smuggling in Node.js 10, 12, and 13 causes malicious payload delivery when transfer-encoding is malformed
  56Plan
• CVE-2021-22883Node.js before 10.24.0, 12.21.0, 14.16.0, and 15.10.0 is vulnerable to a denial of service attack when too many connection attempts with an
  52Plan
• CVE-2021-22930Node.js before 16.6.0, 14.17.4, and 12.22.4 is vulnerable to a use after free attack where an attacker might be able to exploit the memory c
  50Plan
• CVE-2021-22931Node.js before 16.6.0, 14.17.4, and 12.22.4 is vulnerable to Remote Code Execution, XSS, Application crashes due to missing input validation
  46Plan
• CVE-2020-8277A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versi
  46Plan
• CVE-2017-14849Node.js 8.5.0 before 8.6.0 allows remote attackers to access unintended files, because a change to ".." handling was incompatible with the p
  46Plan

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.