CVE-2021-33526— Privilege escalation in mbDIALUP <= 3.9R0.0
Quick assessment
Affected
MB connect line mbDIALUP
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 mbDIALUP是MB connect line公司的一个应用软件。由 MB Connect Line GmbH 开发，供一位Software Informer用户使用。 mbDIALUP 存在安全漏洞，该漏洞源于在MB连接线mbDIALUP版本<= 3.9R0.0中，低特权的攻击者可以向使用NT AUTHORITYSYSTEM运行的服务发送命令，指示它执行恶意的OpenVPN配置。攻击者可利用该漏洞执行任意代码。
Possible ATT&CK Techniques 2 AI
T1546 · Event Triggered Execution T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-33526
Vulnerability Information
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Vulnerability Title
Privilege escalation in mbDIALUP <= 3.9R0.0
Source: CVE Program / CVE List V5
Vulnerability Description
In MB connect line mbDIALUP versions <= 3.9R0.0 a low privileged local attacker can send a command to the service running with NT AUTHORITY\SYSTEM instructing it to execute a malicous OpenVPN configuration resulting in arbitrary code execution with the privileges of the service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
MB connect line mbDIALUP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MB connect line mbDIALUP是MB connect line公司的一个应用软件。由 MB Connect Line GmbH 开发，供一位Software Informer用户使用。 mbDIALUP 存在安全漏洞，该漏洞源于在MB连接线mbDIALUP版本<= 3.9R0.0中，低特权的攻击者可以向使用NT AUTHORITYSYSTEM运行的服务发送命令，指示它执行恶意的OpenVPN配置。攻击者可利用该漏洞执行任意代码。
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 | mbDIALUP | 3.9R0.0 ~ 3.9R0.0 | - |
|
II. Public POCs for CVE-2021-33526
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-33526 (1)
-
https://cert.vde.com/de-de/advisories/vde-2021-017 x_refsource_CONFIRM
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-2021-34575 | 7.5 HIGH | Information Exposure in mymbCONNECT24, mbCONNECT24 <= 2.8.0 |
| CVE-2021-34574 | 4.3 MEDIUM | Password policy evasion in products of MB connect line and Helmholz |
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V. Comments for CVE-2021-33526
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