CVE-2019-6533 Missing authorization in PR100088 Modbus gateway

Critical 9.1 Published 12 Feb 2019 Updated 16 Sep 2024

Unauthenticated attackers can read and write Modbus registers via the web interface, compromising industrial control data integrity and confidentiality.

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-2019-6533?

CVE-2019-6533 is a critical missing authorization vulnerability in ICS-CERT PR100088 Modbus gateway, published on 12 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Registers used to store Modbus values can be read and written from the web interface without authentication in the PR100088 Modbus gateway versions prior to Release R02 (or Software Version 1.1.13166).

Weakness: CWE-306

Which versions are affected by CVE-2019-6533?

It affects 1 product.

Products include Kunbus Pr100088 Modbus Gateway Firmware.

How do I fix CVE-2019-6533?

No fix has been published for CVE-2019-6533 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-2019-6533 being exploited?

There is no known exploitation of CVE-2019-6533 in the wild and no public exploit code.

Sources

Also known as GHSA-gj7v-j8r4-326v.