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.
Weakness
Performing cryptographic operations without ensuring that the supporting inputs are ready to supply valid data may compromise the cryptographic result.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Z/ip_gateway_sdk | Silabs | * | 7.18.03 (including) |
Potential Mitigations
Related Attack Patterns
References
- https://github.com/SiliconLabs/gecko_sdk
- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0698Y00000buWj0QAE?operationContext=S1
- https://github.com/SiliconLabs/gecko_sdk
- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/0698Y00000buWj0QAE?operationContext=S1