CVE intelligence and bounded remediation

CVE-2022-27481 — Siemens Scalance W1788-2Ia M12 Firmware security vulnerability

Medium CVSS 5.7

A vulnerability has been identified in SCALANCE W1788-1 M12 (All versions < V3.0.0), SCALANCE W1788-2 EEC M12 (All versions < V3.0.0), SCALANCE W1788-2 M12 (All versions < V3.0.0), SCALANCE W1788-2IA M12 (All versions < V3.0.0). Affected devices do not properly handle resources of ARP requests. This could allow an attacker to cause a race condition that leads to a crash of the entire device.

Severity
Medium
CVSS
5.7 (2.0)
Published
2022-04-12
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-362

Affected products

  • siemens / scalance_w1788-2ia_m12_firmware
  • siemens / scalance_w1788-2_m12_firmware
  • siemens / scalance_w1788-2_eec_m12_firmware
  • siemens / scalance_w1788-1_m12_firmware

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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