An attacker with network access to an affected product may cause a denial of service condition by breaking the real-time synchronization (IR

Affected versions

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

• siemens cp1604 firmwarebefore 2.8
• siemens cp1616 firmwarebefore 2.8
• siemens dk standard ethernet controller firmwarebefore 4.1.1
• siemens dk standard ethernet controller firmware4.1.1
• siemens ek-ertec 200 firmwarebefore 4.5.0
• siemens ek-ertec 200 firmware4.5.0
• siemens ek-ertec 200p firmwarebefore 4.5.0
• siemens scalance x-200irt firmwarebefore 5.2.1
• siemens simatic et 200ecopn firmwareall versions
• siemens simatic et 200m firmwareall versions
• siemens simatic et 200s firmwareall versions
• siemens simatic pn/pn coupler 6es7158-3ad01-0xa0 firmwareall versions
• siemens simatic s7-300 cpu 312 ifm firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 313 firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 314 firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 314 ifm firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 315 firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 315-2 dp firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 316-2 dp firmwarebefore 3.3.17
• siemens simatic s7-300 cpu 318-2 firmwarebefore 3.3.17

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 Patch 05affected

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

  • All versions < V4.5.0 Patch 01affected

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

  • All versions < V4.5.0affected

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

  • All versions < V5.2.1affected

• Siemens SIMATIC CP 1604

  • All versions < V2.8affected

• Siemens SIMATIC CP 1616

  • All versions < V2.8affected

• Siemens SIMATIC ET 200M (incl. SIPLUS variants)

  • All versionsaffected

• Siemens SIMATIC ET 200MP IM 155-5 PN HF

  • before V4.2.0affected

• Siemens SIMATIC ET 200MP IM 155-5 PN ST

  • before V4.1.0affected

• Siemens SIMATIC ET 200pro IM 154-3 PN HF

  • all versionsaffected

• Siemens SIMATIC ET 200pro IM 154-4 PN HF

  • all versionsaffected

• Siemens SIMATIC ET 200pro IM 154-8 PN/DP CPU

  • All versions < V3.2.17affected

Other highest-scoring records for the same primary product.

• CVE-2019-6568The webserver of the affected devices contains a vulnerability that may lead to a denial of service condition.
  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.