CVE-2020-28397 is a vulnerability in Siemens Simatic S7 1500 Software Controller
Published on August 10, 2021
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.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2020-28397 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2020-28397
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Affected Versions
Siemens SIMATIC Drive Controller family:- Version All versions < V2.9.2 is affected.
- Version All versions < V21.9 is affected.
- Version All versions > V2 < V4 is affected.
- Version Version V4.4 is affected.
- Version All versions > V2.5 < V2.9.2 is affected.
- Version All versions > V2.5 < V21.9 is affected.
- Version Version V2.1 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.