CVE-2019-9513: Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a denial of service

Affected versions

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

• f5 nginx1.9.5 and later · before 1.16.1
• f5 nginx1.17.0 and later · up to 1.17.2 inclusive
• nodejs node.js8.0.0 and later · up to 8.8.1 inclusive
• nodejs node.js8.9.0 and later · before 8.16.1
• nodejs node.js10.0.0 and later · up to 10.12.0 inclusive
• nodejs node.js10.13.0 and later · before 10.16.3
• nodejs node.js12.0.0 and later · before 12.8.1

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-2019-9515Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a denial of service
  56Plan
• CVE-2019-9514Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a denial of service
  55Plan
• CVE-2019-9512Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a denial of service
  55Plan

Published before and after this one in the same product

• ← EarlierCVE-2018-4281Jan 11, 2019 · In SwiftNIO before 1.8.0, a buffer overflow was addressed with improved size validation.
  39Monitor
• ← EarlierCVE-2019-9511Aug 13, 2019 · Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service
  48Plan
• Later →CVE-2019-9516Aug 13, 2019 · Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service
  43Plan

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.