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 take control of or cause a denial of service to a vulnerable device.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.41% probability · 35th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-311
- Affected
- linear/wadwaz-1 · linear/wapirz-1 · silabs/100 series firmware · silabs/200 series firmware · silabs/300 series firmware
- Source
- cret@cert.org
References
- https://doi.org/10.1109/ACCESS.2021.3138768Broken Link
- https://github.com/CNK2100/VFuzz-publicThird Party Advisory
- https://ieeexplore.ieee.org/document/9663293Broken Link
- https://kb.cert.org/vuls/id/142629Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/142629Third Party Advisory, US Government Resource
- https://doi.org/10.1109/ACCESS.2021.3138768Broken Link
- https://github.com/CNK2100/VFuzz-publicThird Party Advisory
- https://ieeexplore.ieee.org/document/9663293Broken Link
- https://kb.cert.org/vuls/id/142629Third Party Advisory, US Government Resource
- https://www.kb.cert.org/vuls/id/142629Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.