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CVE-2021-34575— Information Exposure in mymbCONNECT24, mbCONNECT24 <= 2.8.0

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（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 多款产品存在信息泄露漏洞，该漏洞源于 2.8.0 版本及之前版本的 mymbCONNECT24、mbCONNECT24 中，未经身份验证的用户可以通过检查服务器发送的响应类型来枚举有效用户。

CVSS 7.5 · High EPSS 1.03% · P62

Possible ATT&CK Techniques 1 AI

T1087.004 · Cloud Account
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I. Basic Information for CVE-2021-34575

Vulnerability Information
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Vulnerability Title
Information Exposure in mymbCONNECT24, mbCONNECT24 <= 2.8.0
Source: CVE Program / CVE List V5
Vulnerability Description
In MB connect line mymbCONNECT24, mbCONNECT24 in versions <= 2.8.0 an unauthenticated user can enumerate valid users by checking what kind of response the server sends.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过差异性导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
MB connect line 多款产品 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mb Connect Line MB CONNECT LINE mbCONNECT24是德国MB CONNECT LINE（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 多款产品存在信息泄露漏洞，该漏洞源于 2.8.0 版本及之前版本的 mymbCONNECT24、mbCONNECT24 中，未经身份验证的用户可以通过检查服务器发送的响应类型来枚举有效用户。
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 2.8.0 ~ 2.8.0 -
MB connect line mbCONNECT24 2.8.0 ~ 2.8.0 -

II. Public POCs for CVE-2021-34575

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III. Intelligence Information for CVE-2021-34575

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Other References for CVE-2021-34575 (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-2021-34574 4.3 MEDIUM Password policy evasion in products of MB connect line and Helmholz

IV. Related Vulnerabilities

Same product: mymbCONNECT24
Same vendor: MB connect line
Same weakness: CWE-203

V. Comments for CVE-2021-34575

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