Encryption Key Exposure in Modicon M221 Controllers by Schneider Electric
CVE-2020-7566

7.3HIGH

Key Information:

Vendor

Schneider Electric
Status
Modicon M221, All References, All Versions
Vendor
CVE Published:
19 November 2020

What is CVE-2020-7566?

A vulnerability in Modicon M221 controllers by Schneider Electric allows attackers to potentially compromise encryption keys when traffic is intercepted between EcoStruxure Machine - Basic software and the controller. This flaw arises from a limited randomness space, which could lead to predictable cryptographic values, exposing sensitive communication channels and potentially enabling unauthorized access to the system.

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Affected Version(s)

Modicon M221, all references, all Modicon M221, all references, all versions

References

https://www.se.com/ww/en/download/document/SEVD-2020-315-05/
x_refsource_MISC
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-04
x_refsource_MISC

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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