CVE intelligence and bounded remediation

CVE-2019-6848 — Schneider-Electric Modicon M580 Firmware security vulnerability

High CVSS 8.6

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info), which could cause a Denial of Service attack on the PLC when sending specific data on the REST API of the controller/communication module.

Severity
High
CVSS
8.6 (3.1)
Published
2019-10-29
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-755

Affected products

  • schneider-electric / modicon_m580_firmware
  • schneider-electric / modicon_bmenoc_0311_firmware
  • schneider-electric / modicon_bmenoc_0321_firmware

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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