CVE-2021-37204 is a vulnerability in Siemens Simatic S7 1500 Software Controller
Published on February 9, 2022
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.
Weakness Type
Operation on a Resource after Expiration or Release
The software uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.
Products Associated with CVE-2021-37204
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Affected Versions
Siemens SIMATIC Drive Controller family:- Version All versions < V2.9.2 is affected.
- Version All versions >= V2.9.2 < V2.9.4 is affected.
- Version All versions is affected.
- Version All versions < V21.9 is affected.
- Version All versions >= V21.9 < V21.9.4 is affected.
- Version All versions is affected.
- Version All versions < V4.5.0 is affected.
- Version All versions >= V4.5.0 < V4.5.2 is affected.
- Version All versions < V2.9.2 is affected.
- Version All versions >= V2.9.2 < V2.9.4 is affected.
- Version All versions < V21.9 is affected.
- Version All versions >= V21.9 < V21.9.4 is affected.
- Version All versions < V4.0 is affected.
- Version All versions >= V4.0 < V4.0 SP1 is affected.
- Version All versions < V2.3.6 is affected.
- Version All versions < V2.3.6 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.