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CVE-2022-34746

Quick assessment

Affected
Zyxel Zyxel GS1900 series firmware
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.

Zyxel GS1900是中国台湾合勤（Zyxel）公司的一款管理型交换机。 Zyxel GS1900 系列 V2.70之前版本存在安全特征问题漏洞，该漏洞源于不正确的使用低熵随机源生成RSA密钥。攻击者利用该漏洞通过在web管理界面的证书中考虑RSA模数N来检索私钥。

CVSS 5.9 · Medium EPSS 0.34% · P27

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys
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I. Basic Information for CVE-2022-34746

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An insufficient entropy vulnerability caused by the improper use of randomness sources with low entropy for RSA key pair generation was found in Zyxel GS1900 series firmware versions prior to V2.70. This vulnerability could allow an unauthenticated attacker to retrieve a private key by factoring the RSA modulus N in the certificate of the web administration interface.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息熵不充分
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel GS1900 安全特征问题特征问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel GS1900是中国台湾合勤（Zyxel）公司的一款管理型交换机。 Zyxel GS1900 系列 V2.70之前版本存在安全特征问题漏洞，该漏洞源于不正确的使用低熵随机源生成RSA密钥。攻击者利用该漏洞通过在web管理界面的证书中考虑RSA模数N来检索私钥。
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
Zyxel Zyxel GS1900 series firmware < V2.70 -

II. Public POCs for CVE-2022-34746

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III. Intelligence Information for CVE-2022-34746

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Other References for CVE-2022-34746 (1)

IV. Related Vulnerabilities

Same vendor: Zyxel
Same weakness: CWE-331

V. Comments for CVE-2022-34746

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