Vulnerability · Published Dec 14, 2023 · Assigned by Silabs
CVE-2023-4489Z/IP Gateway Use of Uninitialized PRNG when Generating S0 Encryption Key
Medium 6.4
In plain English
A medium-severity security flaw in Z/IP Gateway SDK from silabs.com. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).
Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.5%top 55.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| silabs.com | Z/IP Gateway SDK | 0 – through 7.18.3 |
Weakness: CWE-1279 · Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H