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CVE-2023-4489— Z/IP Gateway Use of Uninitialized PRNG when Generating S0 Encryption Key

Quick assessment

Affected
silabs.com Z/IP Gateway SDK
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Silicon Labs Gecko SDK（GSDK）是Silicon Labs开源的一个库。将 Silicon Labs 无线软件开发工具包（SDK）和 Gecko 平台结合为一个集成的软件包。 Silicon Labs Gecko SDK v7.18.3及之前版本存在安全漏洞，该漏洞源于生成的第一个S0密钥可预测，可能允许未经授权的网络访问。

CVSS 6.4 · Medium EPSS 0.53% · P42

Possible ATT&CK Techniques 1 AI

T1552 · Unsecured Credentials
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I. Basic Information for CVE-2023-4489

Vulnerability Information
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Vulnerability Title
Z/IP Gateway Use of Uninitialized PRNG when Generating S0 Encryption Key
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1279
Source: CVE Program / CVE List V5
Vulnerability Title
Silicon Labs Gecko SDK 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Silicon Labs Gecko SDK（GSDK）是Silicon Labs开源的一个库。将 Silicon Labs 无线软件开发工具包（SDK）和 Gecko 平台结合为一个集成的软件包。 Silicon Labs Gecko SDK v7.18.3及之前版本存在安全漏洞，该漏洞源于生成的第一个S0密钥可预测，可能允许未经授权的网络访问。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
silabs.com Z/IP Gateway SDK 0 ~ 7.18.3 -

II. Public POCs for CVE-2023-4489

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III. Intelligence Information for CVE-2023-4489

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Other References for CVE-2023-4489 (2)

IV. Related Vulnerabilities

Same product: Z/IP Gateway SDK
Same vendor: silabs.com
Same weakness: CWE-1279

V. Comments for CVE-2023-4489

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