Improper Check Vulnerability in Modicon Controllers by Schneider Electric
CVE-2020-7549

5.3MEDIUM

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

What is CVE-2020-7549?

A vulnerability exists in the Web Server of Schneider Electric's Modicon M340, Quantum, and Premium controllers, including associated Communication Modules. This issue arises due to an improper check for unusual conditions, potentially allowing an attacker to send a series of specially crafted requests to the controller over HTTP. As a result, this may lead to a denial of HTTP and FTP services, disrupting normal operations and potentially impacting industrial processes.

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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-2020-343-06/
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CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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