CVE-2020-35557 Improper Access Validation in products of MB connect line and Helmholz

Medium 6.5 Published 16 Feb 2021 Updated 16 Sep 2024

A logged-in user can view devices belonging to other accounts due to improper access validation in MB connect line and Helmholz industrial IoT products.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-35557?

CVE-2020-35557 is a medium-severity missing authorization vulnerability in n/a, published on 16 Feb 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An issue in MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual in all versions through v2.11.2 allows a logged in user to see devices in the account he should not have access to due to improper use of access validation.

Weakness: CWE-269

Which versions are affected by CVE-2020-35557?

It affects 4 products.

Products include Helmholz Myrex24, Helmholz Myrex24.virtual, Mbconnectline Mbconnect24, Mbconnectline Mymbconnect24.

How do I fix CVE-2020-35557?

No fix has been published for CVE-2020-35557 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-35557 being exploited?

There is no known exploitation of CVE-2020-35557 in the wild and no public exploit code.

Sources

Also known as GHSA-4jrw-3q8x-9gpf.