CVE-2021-33526 - CVE House

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Status published High CVE-2021-33526

Privilege escalation in mbDIALUP <= 3.9R0.0

7.8 CVSS

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

Noam Moshe of Claroty reported this vulnerability to MB connect line GmbH. CERT@VDE coordinated.

References

https://cert.vde.com/de-de/advisories/vde-2021-017

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Affected Vendor

MB connect line

View all reports →

Affected Software

mbDIALUP

Vulnerable Versions:

3.9R0.0

Timeline

Official Publish: August 2nd, 2021

Last Modified: September 17th, 2024

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1078 Valid Accounts

T1098 Account Manipulation

Privilege Escalation

T1548 Abuse Elevation Control Mechanism

Privilege Escalation

T1222 File and Directory Permissions Modification

Defense Evasion

T1134 Access Token Manipulation

Defense Evasion