CVE intelligence and bounded remediation

CVE-2018-7758 — Schneider-Electric Micom P141 Firmware security vulnerability

Medium CVSS 6.5

A denial of service vulnerability exists in Schneider Electric's MiCOM Px4x (P540 range excluded) with legacy Ethernet board, MiCOM P540D Range with Legacy Ethernet Board, and MiCOM Px4x Rejuvenated could lose network communication in case of TCP/IP open requests on port 20000 (DNP3oE) if an older TCI/IP session is still open with identical IP address and port number.

Severity
Medium
CVSS
6.5 (3.0)
Published
2018-04-18
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-613

Affected products

  • schneider-electric / micom_p141_firmware
  • schneider-electric / micom_p142_firmware
  • schneider-electric / micom_p143_firmware
  • schneider-electric / micom_p145_firmware
  • schneider-electric / micom_p642_firmware
  • schneider-electric / micom_p643_firmware

Showing 6 representative product identities from 23 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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