CVE-2021-37204: High severity siemens simatic drive controller cpu 1504d tf vulnerability
A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC Drive Controller family (All versions >= V2.9.2 < V2.9.4), 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 < V21.9), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V21.9 < V21.9.4), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 Ready4Linux (All versions), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.5.0), 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), 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), SIMATIC S7-1500 Software Controller (All versions >= V21.9 < V21.9.4), SIMATIC S7-PLCSIM Advanced (All versions < V4.0), 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 packet over port 102/tcp. A restart of the affected device is needed to restore normal operations.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2021-37204?
CVE-2021-37204 has a medium severity rating due to potential unauthorized access to vulnerable devices.
How do I fix CVE-2021-37204?
To fix CVE-2021-37204, update the affected Siemens SIMATIC Drive Controller or associated firmware to version 2.9.4 or later.
What devices are affected by CVE-2021-37204?
CVE-2021-37204 affects all versions of the Siemens SIMATIC Drive Controller family prior to 2.9.2 and between 2.9.2 and 2.9.4.
Is CVE-2021-37204 publicly known?
Yes, CVE-2021-37204 is publicly known and documented in security advisories by Siemens.
What are the potential impacts of CVE-2021-37204?
The potential impacts of CVE-2021-37204 include unauthorized access and possible manipulation of the affected control systems.