CVE-2023-4489

low-risk

Published 2023-12-14

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.

Do I need to act?

0.69% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 6.4/10 Medium

PHYSICAL / HIGH complexity

Affected Products (1)

Z\/Ip Gateway Sdk

Affected Vendors

Silabs

References (4)

Third Party Advisory https://github.com/SiliconLabs/gecko_sdk

Permissions Required https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0...

Third Party Advisory https://github.com/SiliconLabs/gecko_sdk

Permissions Required https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0...

/ 100

low-risk

Severity 17/34 · Moderate

Exploitability 2/34 · Minimal

Exposure 5/34 · Minimal