CVE-2020-35558 SSRF in products of MB connect line and Helmholz

High 7.5 Published 16 Feb 2021 Updated 16 Sep 2024

An SSRF vulnerability in MB connect line and Helmholz industrial gateways allows attackers to scan ports and potentially leak credential information.

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

What is CVE-2020-35558?

CVE-2020-35558 is a high-severity server-side request forgery vulnerability in n/a, published on 16 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in MB connect line mymbCONNECT24, mbCONNECT24 and Helmholz myREX24 and myREX24.virtual through 2.11.2. There is an SSRF in the in the MySQL access check, allowing an attacker to scan for open ports and gain some information about possible credentials.

Weakness: CWE-918

Which versions are affected by CVE-2020-35558?

It affects 4 products.

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

How do I fix CVE-2020-35558?

No fix has been published for CVE-2020-35558 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2020-35558 being exploited?

There is no known exploitation of CVE-2020-35558 in the wild and no public exploit code.

Sources

Also known as GHSA-8977-r7mx-5hvr.