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CVE-2021-23845— B426 Web Configuration Authentication Bypass

Quick assessment

Affected
Bosch B426 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.

Bosch B426等都是德国博世（Bosch）公司的一个固件。 Bosch多个产品存在访问控制错误漏洞，该漏洞源于lgs.cgi模块中使用硬编码的会话令牌。该漏洞允许远程攻击者绕过受影响的Bosch产品安装的身份验证。以下产品和版本受到影响：Bosch B426 Firmware < 03.08、Bosch B426-CN/B429- CN Firmware < 03.08、Bosch B426-M Firmware < 03.10。

CVSS 8.0 · High EPSS 0.84% · P55
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I. Basic Information for CVE-2021-23845

Vulnerability Information
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Vulnerability Title
B426 Web Configuration Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
This vulnerability could allow an attacker to hijack a session while a user is logged in the configuration web page. This vulnerability was discovered by a security researcher in B426 and found during internal product tests in B426-CN/B429-CN, and B426-M and has been fixed already starting from version 3.08 on, which was released on June 2019.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Bosch多个产品访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Bosch B426等都是德国博世（Bosch）公司的一个固件。 Bosch多个产品存在访问控制错误漏洞，该漏洞源于lgs.cgi模块中使用硬编码的会话令牌。该漏洞允许远程攻击者绕过受影响的Bosch产品安装的身份验证。以下产品和版本受到影响：Bosch B426 Firmware < 03.08、Bosch B426-CN/B429- CN Firmware < 03.08、Bosch B426-M Firmware < 03.10。
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
Bosch B426 Firmware unspecified ~ 03.08 -
Bosch B426-CN/B429- CN Firmware unspecified ~ 03.08 -
Bosch B426-M Firmware unspecified ~ 03.10 -

II. Public POCs for CVE-2021-23845

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III. Intelligence Information for CVE-2021-23845

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Other References for CVE-2021-23845 (1)

IV. Related Vulnerabilities

Same product: B426 Firmware
Same vendor: Bosch
Same weakness: CWE-284

V. Comments for CVE-2021-23845

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