Specially crafted PROFINET DCP broadcast packets could cause a denial of service condition of affected products on a local Ethernet segment

Affected versions

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

• siemens dk standard ethernet controller firmwarebefore 4.1.1
• siemens dk standard ethernet controller firmware4.1.1
• siemens ek-ertec 200 pn io firmwarebefore 4.2.1
• siemens ek-ertec 200 pn io firmware4.2.1
• siemens ek-ertec 200p pn io firmwarebefore 4.4.0
• siemens ek-ertec 200p pn io firmware4.4.0
• siemens extension unit 12 profinet firmwarebefore 01.01.01
• siemens extension unit 15 profinet firmwarebefore 01.01.01
• siemens extension unit 19 profinet firmwarebefore 01.01.01
• siemens extension unit 22 profinet firmwarebefore 01.01.01
• siemens ie/as-i link pn io firmwareall versions
• siemens ie/pb-link firmwarebefore 3.0
• siemens pn/pn coupler firmwarebefore 4.0
• siemens scalance m-800 firmwarebefore 4.03
• siemens scalance s615 firmwarebefore 4.03
• siemens scalance w700 firmwarebefore 6.1
• siemens scalance x200 firmwarebefore 5.2.2
• siemens scalance x200 irt firmwarebefore 5.4.0
• siemens scalance x300 firmwarebefore 4.1.0
• siemens scalance x408 firmwarebefore 4.1.0

Versions reported by the vendor

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

• Siemens Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller

  • All versions < V4.1.1 Patch04affected

• Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200

  • All versions < V4.2.1 Patch03affected

• Siemens Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P

  • All versions < V4.4.0 Patch01affected

• Siemens Extension Unit 12" PROFINET

  • All versions < V01.01.01affected

• Siemens Extension Unit 15" PROFINET

  • All versions < V01.01.01affected

• Siemens Extension Unit 19" PROFINET

  • All versions < V01.01.01affected

• Siemens Extension Unit 22" PROFINET

  • All versions < V01.01.01affected

• Siemens IE/AS-i Link PN IO

  • All versionsaffected

• Siemens IE/PB-Link (incl. SIPLUS NET variants)

  • All versions < V3.0affected

• Siemens SCALANCE M-800 family (incl. S615, MUM-800 and RM1224)

  • All versions < V4.03affected

• Siemens SCALANCE W-700 IEEE 802.11n family

  • All versions < V6.1affected

• Siemens SCALANCE X-200 family (incl. SIPLUS NET variants)

  • All versions < V5.2.2affected

Other highest-scoring records for the same primary product.

• CVE-2017-2681Specially crafted PROFINET DCP packets sent on a local Ethernet segment (Layer 2) to an affected product could cause a denial of service con
  28Monitor

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.