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 CPU 1504D TF
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 firmware
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
siemens tim 1531 irc firmware>=2.2
siemens tim 1531 irc
Siemens SIMATIC S7-1500 Firmware
siemens simatic s7-1200 cpu 1211c firmware>=4.5.0<4.5.2
siemens simatic s7-1200 cpu 1211c
siemens simatic s7-1200 cpu 1212c firmware>=4.5.0<4.5.2
siemens simatic s7-1200 cpu 1212c
siemens simatic s7-1200 cpu 1212fc firmware>=4.5.0<4.5.2
siemens simatic s7-1200 cpu 1212fc
siemens simatic s7-1200 cpu 1214fc firmware>=4.5.0<4.5.2
siemens simatic s7-1200 cpu 1214fc
siemens simatic s7-1200 cpu 1214c firmware>=4.5.0<4.5.2
Siemens SIMATIC S7-1200 CPU 1214C DC/DC/DC
siemens simatic s7-1200 cpu 1215fc firmware>=4.5.0<4.5.2
siemens simatic s7-1200 cpu 1215fc
siemens simatic s7-1200 cpu 1215c firmware>=4.5.0<4.5.2
Siemens CPU 1215C
siemens simatic s7-1200 cpu 1217c firmware>=4.5.0<4.5.2
siemens simatic s7-1200 cpu 1217c
siemens simatic s7-1500 cpu 1510sp-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1510sp-1
siemens simatic s7-1500 cpu 1510sp firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1510sp
siemens simatic s7-1500 cpu 1511-1 firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500
siemens simatic s7-1500 cpu 1511c-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1511c-1
siemens simatic s7-1500 cpu 1511f-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1511f-1
siemens simatic s7-1500 cpu 1511t-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1511t-1
siemens simatic s7-1500 cpu 1511tf-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1511tf-1
siemens simatic s7-1500 cpu 1512c-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1512c-1
siemens simatic s7-1500 cpu 1512sp-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1512sp-1
siemens simatic s7-1500 cpu 1512spf-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1512spf-1
siemens simatic s7-1500 cpu 1513-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1513-1
siemens simatic s7-1500 cpu 1513f-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1513f-1
siemens simatic s7-1500 cpu 1513r-1 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1513r-1
siemens simatic s7-1500 cpu cpu 1513prof-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu cpu 1513prof-2
siemens simatic s7-1500 cpu cpu 1513pro-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu cpu 1513pro-2
siemens simatic s7-1500 cpu 1515-2 firmware>=2.9.2<2.9.4
Siemens Simatic S7-1500
siemens simatic s7-1500 cpu 1515f-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1515f-2
siemens simatic s7-1500 cpu 1515r-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1515r-2
siemens simatic s7-1500 cpu 1515t-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1515t-2
siemens simatic s7-1500 cpu 1515tf-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1515tf-2
siemens simatic s7-1500 cpu 1516pro f firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1516pro f
siemens simatic s7-1500 cpu 1516pro-2 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1516pro-2
siemens simatic s7-1500 cpu 1516-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1516-3
siemens simatic s7-1500 cpu 1516f-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1516f-3
siemens simatic s7-1500 cpu 1516t-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1516t-3
siemens simatic s7-1500 cpu 1516tf-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1516tf-3
siemens simatic s7-1500 cpu 1517-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1517-3
siemens simatic s7-1500 cpu 1517f-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1517f-3
siemens simatic s7-1500 cpu 1517tf-3 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1517tf-3
siemens simatic s7-1500 cpu 1518-4 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1518-4
siemens simatic s7-1500 cpu 1518f-4 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1518f-4
siemens simatic s7-1500 cpu 1518hf-4 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1518hf-4
siemens simatic s7-1500 cpu 1518t-4 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1518t-4
siemens simatic s7-1500 cpu 1518tf-4 firmware>=2.9.2<2.9.4
siemens simatic s7-1500 cpu 1518tf-4

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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