VulnerabilityModified
CVE-2023-4489
This makes the first S0 key generated at startup predictable, potentially allowing network key prediction and unauthorized S0 network access.
CRITICAL 9.8EPSS 0.53%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The first S0 encryption key is generated with an uninitialized PRNG in Z/IP Gateway products running Silicon Labs Z/IP Gateway SDK v7.18.3 and earlier. This makes the first S0 key generated at startup predictable, potentially allowing network key prediction and unauthorized S0 network access.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.53% probability · 43th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1279, CWE-908
- Affected
- silabs/z\/ip gateway sdk
- Source
- product-security@silabs.com
References
- https://github.com/SiliconLabs/gecko_sdkThird Party Advisory
- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0698Y00000buWj0QAE?operationContext=S1Permissions Required
- https://github.com/SiliconLabs/gecko_sdkThird Party Advisory
- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0698Y00000buWj0QAE?operationContext=S1Permissions Required
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.