CVE intelligence and bounded remediation

CVE-2020-9060 — Silabs 500 Series Firmware security vulnerability

Medium CVSS 6.5

Z-Wave devices based on Silicon Labs 500 series chipsets using S2, including but likely not limited to the ZooZ ZST10 version 6.04, ZooZ ZEN20 version 5.03, ZooZ ZEN25 version 5.03, Aeon Labs ZW090-A version 3.95, and Fibaro FGWPB-111 version 4.3, are susceptible to denial of service and resource exhaustion via malformed SECURITY NONCE GET, SECURITY NONCE GET 2, NO OPERATION, or NIF REQUEST messages.

Severity: Medium
CVSS: 6.5 (3.1)
Published: 2022-01-10
CISA KEV: Not currently listed
Ecosystem: operating-system
Weaknesses: CWE-346, CWE-400

Affected products

silabs / 500_series_firmware
aeotec / zw090-a / 3.95
fibaro / fgwpb-111 / 4.3
zooz / zen20 / 5.03
zooz / zen25 / 5.03
zooz / zst10 / 6.04

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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