CVE-2020-7589 Missing authorization in LOGO! 8 BM (incl. SIPLUS variants)

Critical 9.1 Published 10 Jun 2020 Updated 4 Aug 2024

Unauthenticated attackers can read and modify device configurations and obtain project files via network access to port 135/tcp.

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-2020-7589?

CVE-2020-7589 is a critical missing authorization vulnerability in Siemens LOGO! 8 BM (incl. SIPLUS variants), published on 10 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions). The vulnerability could lead to an attacker reading and modifying the device configuration and obtain project files from affected devices. The security vulnerability could be exploited by an unauthenticated attacker with network access to port 135/tcp. No user interaction is required to exploit this security vulnerability. The vulnerability impacts confidentiality, integrity, and availability of the device. At the time of advisory publication no public exploitation of this security vulnerability was known.

Weakness: CWE-306

Which versions are affected by CVE-2020-7589?

It affects 1 product.

Products include Siemens Logo\! 8 Bm Firmware.

How do I fix CVE-2020-7589?

No fix has been published for CVE-2020-7589 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-2020-7589 being exploited?

There is no known exploitation of CVE-2020-7589 in the wild and no public exploit code.

Sources

Also known as GHSA-ppw3-jw8r-c26q.