The Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack.

Affected versions

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

• apache traffic controlup to 1.8.0 inclusive
• apache traffic control1.8.1
• apache traffic control2.0.0

Versions reported by the vendor

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

• Apache Software Foundation Apache Traffic Control

  • 1.8.0 incubating, 2.0.0 RC0 incubatingaffected

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-2024-45387Apache Traffic Control: SQL Injection in Traffic Ops endpoint PUT deliveryservice_request_comments
  48Plan
• CVE-2021-43350LDAP filter injection vulnerability in Traffic Ops
  40Plan
• CVE-2019-12405Improper authentication is possible in Apache Traffic Control versions 3.0.0 and 3.0.1 if LDAP is enabled for login in the Traffic Ops API c
  40Plan
• CVE-2022-23206Server-Side Request Forgery in Traffic Ops endpoint POST /user/login/oauth
  31Monitor
• CVE-2025-61581Apache Traffic Control: ReDoS issue in Traffic Router configuration
  30Monitor
• CVE-2020-17522When ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files include
  24Monitor

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.