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CVE-2021-34574— Password policy evasion in products of MB connect line and Helmholz

Quick assessment

Affected
MB connect line mymbCONNECT24
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.

Mb Connect Line MB CONNECT LINE mbCONNECT24是德国Mb Connect Line公司的一套远程服务门户网站。该产品支持远程接入、数据记录和报警等功能。 MB CONNECT LINE mbCONNECT24存在安全漏洞，该漏洞源于在MB连接线mbCONNECT24, mbCONNECT24在版本<= 2.8.0中，攻击者可利用该漏洞更改他的帐户密码为一个新密码，违反密码策略，拦截和修改请求发送给服务器。

CVSS 4.3 · Medium EPSS 0.66% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-34574

Vulnerability Information
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Vulnerability Title
Password policy evasion in products of MB connect line and Helmholz
Source: CVE Program / CVE List V5
Vulnerability Description
In MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 an authenticated attacker can change the password of his account into a new password that violates the password policy by intercepting and modifying the request that is send to the server.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在范围间的资源转移不正确
Source: CVE Program / CVE List V5
Vulnerability Title
MB CONNECT LINE mbCONNECT24 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mb Connect Line MB CONNECT LINE mbCONNECT24是德国Mb Connect Line公司的一套远程服务门户网站。该产品支持远程接入、数据记录和报警等功能。 MB CONNECT LINE mbCONNECT24存在安全漏洞，该漏洞源于在MB连接线mbCONNECT24, mbCONNECT24在版本<= 2.8.0中，攻击者可利用该漏洞更改他的帐户密码为一个新密码，违反密码策略，拦截和修改请求发送给服务器。
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
MB connect line mymbCONNECT24 2 ~ 2.11.2 -
MB connect line mbCONNECT24 2 ~ 2.11.2 -
Helmholz myREX24 2 ~ 2.11.2 -
Helmholz myREX24.virtual 2 ~ 2.11.2 -

II. Public POCs for CVE-2021-34574

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III. Intelligence Information for CVE-2021-34574

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Other References for CVE-2021-34574 (1)

Same Patch Batch · MB connect line · 2021-08-02 · 4 CVEs total

CVE-2021-33527 9.8 CRITICAL OS Command Injection in mbDIALUP <= 3.9R0.0
CVE-2021-33526 7.8 HIGH Privilege escalation in mbDIALUP <= 3.9R0.0
CVE-2021-34575 7.5 HIGH Information Exposure in mymbCONNECT24, mbCONNECT24 <= 2.8.0

IV. Related Vulnerabilities

Same product: mymbCONNECT24
Same vendor: MB connect line
Same weakness: CWE-669

V. Comments for CVE-2021-34574

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