CVE-2019-6527 Auth bypass in PR100088 Modbus gateway

Critical 9.8 Published 12 Feb 2019 Updated 17 Sep 2024

An attacker can change the admin password of a logged-in user on the Modbus gateway, leading to unauthorized administrative access.

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-2019-6527?

CVE-2019-6527 is a critical authentication bypass 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

PR100088 Modbus gateway versions prior to Release R02 (or Software Version 1.1.13166) may allow an attacker to be able to change the password for an admin user who is currently or previously logged in, provided the device has not been restarted.

Weakness: CWE-287

Which versions are affected by CVE-2019-6527?

It affects 1 product.

Products include Kunbus Pr100088 Modbus Gateway Firmware.

How do I fix CVE-2019-6527?

No fix has been published for CVE-2019-6527 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2019-6527 being exploited?

There is no known exploitation of CVE-2019-6527 in the wild and no public exploit code.

Sources

Also known as GHSA-xmgj-jp3c-9mp3.