| Package | Affected versions | Patched versions |
|---|---|---|
| z/ip gateway sdk | ≤ 7.18.03 |
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.
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