CVE-2023-50868: The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a den

Affected versions

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

• debian debian linux10.0
• debian debian linux11.0
• fedoraproject fedora38
• fedoraproject fedora39
• isc bind9.18.11 and later · before 9.18.24
• isc bind9.9.3 and later · before 9.16.48
• isc bind9.0.0 and later · before 9.16.48
• isc bind9.18.0 and later · before 9.18.24
• isc bind9.19.0 and later · before 9.19.21
• netapp active iq unified managerall versions
• netapp bootstrap osall versions
• netapp hci baseboard management controllerall versions
• powerdns recursor5.0.0 and later · before 5.0.2
• powerdns recursorbefore 4.8.5
• powerdns recursor4.9.0 and later · before 4.9.3
• redhat enterprise linux6.0
• redhat enterprise linux7.0
• redhat enterprise linux8.0
• redhat enterprise linux8.2
• redhat enterprise linux8.4

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-2025-0725gzip integer overflow
  30Monitor

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.