Authentication Bypass in Modicon Controllers from Schneider Electric
CVE-2020-7540

9.8CRITICAL

Key Information:

Vendor
Schneider Electric
Status
Web Server On Modicon M340, Legacy Offers Modicon Quantum And Modicon Premium And Associated Communication Modules (see Security Notification For Affected Versions)
Vendor
CVE Published:
11 December 2020

Summary

A Missing Authentication for Critical Function vulnerability exists in the web server of Schneider Electric’s Modicon controllers, including M340, Quantum, and Premium, as well as their associated communication modules. This flaw allows an unauthorized entity to execute commands on the controller simply by sending specially crafted HTTP requests. Such unauthorized access can lead to serious security risks and operational disruptions, making it essential for users to implement recommended security updates.

Affected Version(s)

Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected ) Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)

References

https://www.se.com/ww/en/download/document/SEVD-2020-343-04/
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.