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Simatic Wincc CVE-2019-10929

MEDIUM
Use of a Broken or Risky Cryptographic Algorithm (CWE-327)
2019-08-13 productcert@siemens.com
Authentication Bypass Siemens Simatic Wincc Simatic Wincc Runtime Simatic Step 7 Simatic S7 1200 Cpu 1211C Firmware Simatic S7 1200 Cpu 1212C Firmware Simatic S7 1200 Cpu 1214C Firmware Simatic S7 1200 Cpu 1215C Firmware Simatic S7 1200 Cpu 1217C Firmware Simatic Wincc Open Architecture Simatic S7 Plcsim Advanced Simatic Cp 1626 Firmware Simatic Net Pc Simatic Et 200Sp Open Controller Cpu 1515Sp Pc Firmware Simatic Et 200Sp Open Controller Cpu 1515Sp Pc2 Firmware Simatic S7 1500 Cpu 1518 Firmware Simatic S7 1500 Cpu 1511C Firmware Simatic S7 1500 Cpu 1512C Firmware Simatic S7 1500 Simatic Tim 1531 Irc Firmware Simatic Hmi Panel Firmware
5.9
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

1
CVE Published
Aug 13, 2019 - 19:15 nvd
MEDIUM 5.9

DescriptionNVD

A vulnerability has been identified in SIMATIC CP 1626 (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V20.8), SIMATIC HMI Panel (incl. SIPLUS variants) (All versions), SIMATIC NET PC Software V14 (All versions < V14 SP1 Update 14), SIMATIC NET PC Software V15 (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.4.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.8.1), SIMATIC S7-1500 Software Controller (All versions < V20.8), SIMATIC S7-PLCSIM Advanced (All versions < V3.0), SIMATIC STEP 7 (TIA Portal) (All versions < V16), SIMATIC WinCC (TIA Portal) (All versions < V16), SIMATIC WinCC OA (All versions < V3.16 P013), SIMATIC WinCC Runtime Advanced (All versions < V16), SIMATIC WinCC Runtime Professional (All versions < V16), TIM 1531 IRC (incl. SIPLUS NET variants) (All versions < V2.1). Affected devices contain a message protection bypass vulnerability due to certain properties in the calculation used for integrity protection. This could allow an attacker in a Man-in-the-Middle position to modify network traffic sent on port 102/tcp to the affected devices.

AnalysisAI

A vulnerability has been identified in SIMATIC CP 1626 (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-327. A vulnerability has been identified in SIMATIC CP 1626 (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V20.8), SIMATIC HMI Panel (incl. SIPLUS variants) (All versions), SIMATIC NET PC Software V14 (All versions < V14 SP1 Update 14), SIMATIC NET PC Software V15 (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.4.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.8.1), SIMATIC S7-1500 Software Controller (All versions < V20.8), SIMATIC S7-PLCSIM Advanced (All versions < V3.0), SIMATIC STEP 7 (TIA Portal) (All versions < V16), SIMATIC WinCC (TIA Portal) (All versions < V16), SIMATIC WinCC OA (All versions < V3.16 P013), SIMATIC WinCC Runtime Advanced (All versions < V16), SIMATIC WinCC Runtime Professional (All versions < V16), TIM 1531 IRC (incl. SIPLUS NET variants) (All versions < V2.1). Affected devices contain a message protection bypass vulnerability due to certain properties in the calculation used for integrity protection. This could allow an attacker in a Man-in-the-Middle position to modify network traffic sent on port 102/tcp to the affected devices. Affected products include: Siemens Simatic Et 200Sp Open Controller Cpu 1515Sp Pc Firmware, Siemens Simatic Et 200Sp Open Controller Cpu 1515Sp Pc2 Firmware, Siemens Simatic S7-1200 Cpu 1211C Firmware, Siemens Simatic S7-1200 Cpu 1212C Firmware, Siemens Simatic S7-1200 Cpu 1214C Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Same weakness CWE-327 – Use of a Broken or Risky Cryptographic Algorithm

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CVE-2019-10929 vulnerability details – vuln.today
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