CVE intelligence and bounded remediation

CVE-2023-6408 — Schneider-Electric Modicon M340 Bmxp341000 Firmware security vulnerability

High CVSS 8.1

CWE-924: Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability exists that could cause a denial of service and loss of confidentiality, integrity of controllers when conducting a Man in the Middle attack.

Severity
High
CVSS
8.1 (3.1)
Published
2024-02-14
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-924

Affected products

  • schneider-electric / modicon_m340_bmxp341000_firmware
  • schneider-electric / modicon_m340_bmxp341000h_firmware
  • schneider-electric / modicon_m340_bmxp342000_firmware
  • schneider-electric / modicon_m340_bmxp342010_firmware
  • schneider-electric / modicon_m340_bmxp3420102_firmware
  • schneider-electric / modicon_m340_bmxp3420102cl_firmware

Showing 6 representative product identities from 46 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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