Cisco IOS Access Points Software 802.11r Fast Transition Denial of Service Vulnerability

Affected versions

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

• cisco access points8.4 and later · before 8.5.110.0
• cisco access pointsbefore 8.3.140.0
• cisco access points15.3(3)jd
• cisco access points8.0(140.0)
• cisco access points8.2(141.0)
• cisco access points8.2(151.0)
• cisco access points8.3(102.0)
• cisco access points8.3(112.0)
• cisco access points8.3(114.74)

Versions reported by the vendor

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

• Cisco Cisco Aironet Access Point Software

  • n/aaffected

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.