CVE intelligence and bounded remediation

CVE-2022-37301 — Schneider-Electric Modicon M340 Bmx P34-2010 Firmware security vulnerability

High CVSS 7.5

A CWE-191: Integer Underflow (Wrap or Wraparound) vulnerability exists that could cause a denial of service of the controller due to memory access violations when using the Modbus TCP protocol. Affected products: Modicon M340 CPU (part numbers BMXP34*)(V3.40 and prior), Modicon M580 CPU (part numbers BMEP* and BMEH*)(V3.22 and prior), Legacy Modicon Quantum/Premium(All Versions), Modicon Momentum MDI (171CBU*)(All Versions), Modicon MC80 (BMKC80)(V1.7 and prior)

Severity
High
CVSS
7.5 (3.1)
Published
2022-11-22
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-191

Affected products

  • schneider-electric / modicon_m340_bmx_p34-2010_firmware
  • schneider-electric / modicon_m340_bmx_p34-2030_firmware
  • schneider-electric / modicon_m580_bmeh582040_firmware
  • schneider-electric / modicon_m580_bmeh582040c_firmware
  • schneider-electric / modicon_m580_bmeh582040s_firmware
  • schneider-electric / modicon_m580_bmeh584040_firmware

Showing 6 representative product identities from 48 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Resource exhaustion and denial of service

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify attacker-influenced work factors including input size, nesting, compression, fan-out, regex cost, allocation, recursion, retries, and connection lifetime.
  • Map per-request and shared CPU, memory, disk, descriptor, thread, queue, and downstream-service limits.
  • Determine whether authentication, tenancy, quotas, and rate controls apply before expensive processing begins.

Remediate safely

  • Bound input size, nesting, expansion, work, concurrency, queue depth, retries, and execution time before resource-intensive processing.
  • Release resources on every success, error, cancellation, and timeout path and use backpressure instead of unbounded buffering.
  • Update affected components and add small deterministic tests that assert resource ceilings rather than exhausting a host.

Authoritative sources

Complete CVE record and remediation plan

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