On F5 BIG-IP systems running 13.0.0, 12.1.0 - 12.1.3.1, or 11.6.1 - 11.6.2, every Multipath TCP (MCTCP) connection established leaks a small

Affected versions

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

• f5 big-ip access policy manager11.6.1 and later · up to 11.6.2 inclusive
• f5 big-ip access policy manager12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip access policy manager13.0.0
• f5 big-ip advanced firewall manager11.6.1 and later · up to 11.6.2 inclusive
• f5 big-ip advanced firewall manager12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip advanced firewall manager13.0.0
• f5 big-ip analytics11.6.1 and later · up to 11.6.2 inclusive
• f5 big-ip analytics12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip analytics13.0.0
• f5 big-ip application acceleration manager11.6.1 and later · up to 11.6.2 inclusive
• f5 big-ip application acceleration manager12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip application acceleration manager13.0.0
• f5 big-ip application security manager11.6.1 and later · up to 11.6.2 inclusive
• f5 big-ip application security manager12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip application security manager13.0.0
• f5 big-ip dns12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip dns11.6.1 and later · up to 11.6.2 inclusive
• f5 big-ip dns13.0.0
• f5 big-ip edge gateway12.1.0 and later · up to 12.1.3.1 inclusive
• f5 big-ip edge gateway11.6.1 and later · up to 11.6.2 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (f5). Independent of NVD's CPE analysis and usually ahead of it.

• F5 Networks, Inc. BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Edge Gateway, GTM, Link Controller, PEM, WebAccelerator, WebSafe

  • 13.0.0, 12.1.0 - 12.1.3.1, 11.6.1 - 11.6.2affected

Other highest-scoring records for the same primary product.

• CVE-2016-9244A BIG-IP virtual server configured with a Client SSL profile that has the non-default Session Tickets option enabled may leak up to 31 bytes
  52Plan
• CVE-2016-5745F5 BIG-IP LTM systems 11.x before 11.2.1 HF16, 11.3.x, 11.4.x before 11.4.1 HF11, 11.5.0, 11.5.1 before HF11, 11.5.2, 11.5.3, 11.5.4 before
  40Plan
• CVE-2019-6609Platform dependent weakness.
  39Monitor
• CVE-2018-5506In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp
  39Monitor
• CVE-2017-6131In some circumstances, an F5 BIG-IP version 12.0.0 to 12.1.2 and 13.0.0 Azure cloud instance may contain a default administrative password w
  39Monitor
• CVE-2019-6644Similar to the issue identified in CVE-2018-12120, on versions 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.2, and 12.1.0-12.1.4 BIG-IP wil
  37Monitor

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.