Improper Check for Unusual Conditions in Modicon M340 by Schneider Electric
CVE-2020-7536

7.5HIGH

Key Information:

Vendor
Schneider Electric
Status
Modicon M340 Cpus (bmxp34* Versions Prior To V3.30) And Modicon M340 Communication Ethernet Modules (bmxnoe0100 (h) Versions Prior To V3.4, Bmxnoe0110 (h) Versions Prior To V6.6, And Bmxnor0200h All Versions)
Vendor
CVE Published:
11 December 2020

Summary

A vulnerability exists in Schneider Electric's Modicon M340 series, specifically impacting certain versions of the Modicon M340 CPUs and Communication Ethernet modules. This flaw arises from an improper check for unusual or exceptional conditions, which may render the device unreachable when network parameters are modified via SNMP. Affected users are advised to consult the vendor's documentation and update to the latest versions to mitigate potential risks.

Affected Version(s)

Modicon M340 CPUs (BMXP34* prior to V3.30) and Modicon M340 Communication Ethernet modules (BMXNOE0100 (H) prior to V3.4, BMXNOE0110 (H) prior to V6.6, and BMXNOR0200H all ) Modicon M340 CPUs (BMXP34* versions prior to V3.30) and Modicon M340 Communication Ethernet modules (BMXNOE0100 (H) versions prior to V3.4, BMXNOE0110 (H) versions prior to V6.6, and BMXNOR0200H all versions)

References

https://security.cse.iitk.ac.in/responsible-disclosure
x_refsource_MISC
https://www.se.com/ww/en/download/document/SEVD-2020-343-07/
x_refsource_CONFIRM

CVSS V3.1

Score:
7.5
Severity:
HIGH
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

.