high
7.5
CWE
401
Advisory Published
Updated

CVE-2021-37205

First published: Wed Feb 09 2022(Updated: )

A vulnerability has been identified in SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions >= V4.5.0 < V4.5.2), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.9.2 < V2.9.4), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions >= V4.0 < V4.0 SP1), SIPLUS TIM 1531 IRC (All versions < V2.3.6), TIM 1531 IRC (All versions < V2.3.6). An unauthenticated attacker could cause a denial-of-service condition in a PLC when sending specially prepared packets over port 102/tcp. A restart of the affected device is needed to restore normal operations.

Credit: productcert@siemens.com

Affected SoftwareAffected VersionHow to fix
Siemens SIMATIC Drive Controller CPU 1504D TF<2.9.4
Siemens SIMATIC Drive Controller Firmware
Siemens SIMATIC Drive Controller CPU 1507D TF Firmware<2.9.4
Siemens SIMATIC Drive Controller CPU 1507D TF Firmware
Siemens SIMATIC ET 200SP Open Controller 1515SP PC2
Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 Firmware
Siemens SIMATIC S7 PLCSIM Advanced Firmware<4.0
Siemens SIMATIC S7 PLCSIM Advanced Firmware=4.0
Siemens SIMATIC S7-PLCSIM Advanced Firmware
Siemens Simatic TIM 1531 IRC Firmware>=2.2
Siemens TIM 1531 IRC Firmware
Siemens S7-1500 Controller
Siemens S7-1200 CPU 1211C Firmware>=4.5.0<4.5.2
Siemens Simatic S7-1200 CPU 1211C Firmware
Siemens S7-1200 CPU 1212C Firmware>=4.5.0<4.5.2
Siemens SIMATIC S7-1200 CPU 1212C Firmware
Siemens S7-1200 CPU 1212FC Firmware>=4.5.0<4.5.2
Siemens S7-1200 CPU 1212FC
Siemens S7-1200 CPU 1214FC Firmware>=4.5.0<4.5.2
Siemens SIMATIC S7-1200 CPU 1214FC Firmware
Siemens S7-1200 CPU 1214C Firmware>=4.5.0<4.5.2
Siemens SIMATIC S7-1200 CPU
Siemens Simatic S7-1200 CPU Firmware>=4.5.0<4.5.2
Siemens SIMATIC S7-1200 CPU 1215FC DC/DC/DC
Siemens SIMATIC S7-1200 CPU 1215C DC/DC/DC>=4.5.0<4.5.2
Siemens CPU 1215C
Siemens S7-1200 CPU 1217C Firmware>=4.5.0<4.5.2
Siemens S7-1200 CPU 1217C
Siemens SIMATIC S7-1500 CPU 1510SP Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1510SP Firmware
Siemens SIMATIC S7-1500 CPU 1510SP Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1510SP F-1
Siemens SIMATIC S7-1500 CPU 1511-1>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1511-1 PN
Siemens SIMATIC S7-1500 CPU 1511C-1>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1511C-1 PN
Siemens SIMATIC S7-1500 CPU 1511f-1 PN>=2.9.2<2.9.4
Siemens SIMATIC S7-1511F-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1511T-1 Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1511T-1 PN
Siemens SIMATIC S7-1500 CPU 1511TF-1>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1511TF-1 PN
Siemens SIMATIC S7-1500 CPU 1512C-1 PN Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1512C-1 PN
Siemens SIMATIC S7-1500 CPU 1512SP-1>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1512SP-1 PN
Siemens SIMATIC S7-1500 CPU 1512SPF-1>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1512SPF-1 Firmware
Siemens SIMATIC S7-1513-1 PN CPU>=2.9.2<2.9.4
Siemens SIMATIC S7-1513-1 PN CPU
Siemens SIMATIC S7-1500 CPU 1513F-1>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1513f-1 PN
Siemens SIMATIC S7-1500 CPU 1513R-1 PN Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1513R-1 Firmware
Siemens SIMATIC S7-1500 CPU 1513PROF-2 Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1513PROF-2 Firmware
Siemens Simatic S7-1500 CPU 1513Pro-2>=2.9.2<2.9.4
Siemens Simatic S7-1500 CPU 1513Pro-2
Siemens S7-1500 Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1515-2 PN CPU
Siemens SIMATIC S7-1500 CPU 1515f-2 PN firmware>=2.9.2<2.9.4
Siemens S7-1500 CPU
Siemens Simatic S7-1500 CPU 1515R-2 Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1515R-2 PN
Siemens Simatic S7-1500 CPU 1515T-2 Firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500 CPU 1515T-2 PN
Siemens SIMATIC S7-1500 CPU 1515TF-2>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1515TF-2 PN
Siemens SIMATIC S7-1500 CPU 1516PRO F Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1516PRO F-2 PN
Siemens SIMATIC S7-1500 CPU 1516PRO-2 Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1516pro-2 PN
Siemens SIMATIC S7-1500 CPU 1516-3>=2.9.2<2.9.4
Siemens SIMATIC S7-1500
Siemens SIMATIC S7-1516F-3 PN/DP CPU>=2.9.2<2.9.4
Siemens SIMATIC S7-1516F-3 PN/DP CPU
Siemens Simatic S7-1500 CPU 1516T-3>=2.9.2<2.9.4
Siemens Simatic S7-1500
Siemens SIMATIC S7-1500 CPU 1516TF-3 Firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500
Siemens SIMATIC S7-1500 CPU 1517-3 PN Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1517-3 PN/DP CPU
Siemens SIMATIC S7-1500 CPU 1517F-3>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1517F-3 Firmware
Siemens SIMATIC S7-1500 T Firmware>=2.9.2<2.9.4
Siemens SIMATIC S7-1500 CPU 1517TF-3 Firmware
Siemens SIMATIC S7-1518-4 PN/DP CPU>=2.9.2<2.9.4
Siemens SIMATIC S7-1500
Siemens SIMATIC S7-1500 CPU 1518F-4>=2.9.2<2.9.4
Siemens SIMATIC S7-1518F-4 PN/DP CPU
Siemens SIMATIC S7-1500 CPU 1518-4 Firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500
Siemens Simatic S7-1500 CPU 1518T-4 PN/DP Firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500
Siemens SIMATIC S7-1500 CPU 1518T-4 Firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-838121.pdf

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-37205?

    CVE-2021-37205 has a critical severity rating due to its potential impact on system integrity.

  • How do I fix CVE-2021-37205?

    To fix CVE-2021-37205, users should update to the patched versions of the affected Siemens products as specified by Siemens.

  • What is affected by CVE-2021-37205?

    CVE-2021-37205 affects various Siemens SIMATIC Drive Controllers and S7-1200 CPU families specifically between certain version ranges.

  • What are the potential impacts of CVE-2021-37205?

    The exploitation of CVE-2021-37205 may lead to unauthorized access, integrity loss, or disruption of services.

  • Is there a workaround for CVE-2021-37205 until a patch can be applied?

    There are no specific workarounds documented for CVE-2021-37205, thus immediate patching is recommended.

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