CVE-2021-37205
7.5 · HIGHOverview
CVE-2021-37205 is a high-severity vulnerability affecting siemens simatic_drive_controller_cpu_1504d_tf_firmware. It was published on February 9, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
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.
Remediation
Check the references section for vendor advisories and patches from siemens. Update simatic_drive_controller_cpu_1504d_tf_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| siemens | simatic_drive_controller_cpu_1504d_tf_firmware | >= 0, < 2.9.4 | Affected |
| siemens | simatic_drive_controller_cpu_1507d_tf_firmware | >= 0, < 2.9.4 | Affected |
| siemens | simatic_s7-plcsim_advanced_firmware | >= 0, < 4.0 | Affected |
| siemens | tim_1531_irc_firmware | 2.2 | Affected |
| siemens | simatic_s7-1200_cpu_1211c_firmware | >= 4.5.0, < 4.5.2 | Affected |
| siemens | simatic_s7-1200_cpu_1212c_firmware | >= 4.5.0, < 4.5.2 | Affected |
| siemens | simatic_s7-1200_cpu_1212fc_firmware | >= 4.5.0, < 4.5.2 | Affected |
| siemens | simatic_s7-1200_cpu_1214fc_firmware | >= 4.5.0, < 4.5.2 | Affected |
| siemens | simatic_s7-1200_cpu_1214c_firmware | >= 4.5.0, < 4.5.2 | Affected |
Frequently Asked Questions
What is CVE-2021-37205?
CVE-2021-37205 is a high-severity vulnerability affecting siemens simatic_drive_controller_cpu_1504d_tf_firmware. It was published on February 9, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2021-37205?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-37205?
Check the references section for vendor advisories and patches from siemens. Update simatic_drive_controller_cpu_1504d_tf_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-37205?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-37205 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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