CVE-2021-33526: Privilege escalation in mbDIALUP <= 3.9R0.0
First published: Mon Aug 02 2021(Updated: )
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.
Credit: info@cert.vde.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mbconnectline Mbdialup | <=3.9r0.0 |
Remedy
Update to version 3.9R0.5
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2021-33526.
What is the severity of CVE-2021-33526?
The severity of CVE-2021-33526 is high with a CVSS score of 7.8.
Which software versions are affected by CVE-2021-33526?
MB connect line mbDIALUP versions up to and including 3.9R0.0 are affected by CVE-2021-33526.
How can a low privileged local attacker exploit CVE-2021-33526?
A low privileged local attacker can send a command to the service running with NT AUTHORITY\SYSTEM instructing it to execute a malicious OpenVPN configuration, resulting in arbitrary code execution with the privileges of the service.
Is there a fix available for CVE-2021-33526?
It is recommended to update to a version of MB connect line mbDIALUP that is not affected by CVE-2021-33526. Please refer to the vendor's website or contact their support for more information.
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