CVE-2023-22439 Denial of service in Controller 6000/ Controller 7000

Low 3.1 Published 18 Dec 2023 Updated 2 Aug 2024

Attackers can cause a denial of service in the diagnostic web interface of Gallagher access controllers by sending large HTTP requests.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2023-22439?

CVE-2023-22439 is a low-severity denial of service vulnerability in Gallagher Controller 6000/ Controller 7000, published on 18 Dec 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Improper input validation of a large HTTP request in the Controller 6000 and Controller 7000 optional diagnostic web interface (Port 80) can be used to perform a Denial of Service of the diagnostic web interface.

This issue affects: Gallagher Controller 6000 and 7000 8.90 prior to vCR8.90.231204a (distributed in 8.90.1620 (MR2)), 8.80 prior to vCR8.80.231204a (distributed in 8.80.1369 (MR3)), 8.70 prior to vCR8.70.231204a (distributed in 8.70.2375 (MR5)), 8.60 prior to vCR8.60.231116a (distributed in 8.60.2550 (MR7)), all versions of 8.50 and prior.

Weakness: CWE-20

Which versions are affected by CVE-2023-22439?

It affects 2 products.

Products include Gallagher Command Centre, Gallagher Controller 6000 Firmware.

How do I fix CVE-2023-22439?

No fix has been published for CVE-2023-22439 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-22439 being exploited?

There is no known exploitation of CVE-2023-22439 in the wild and no public exploit code.

Sources

Also known as GHSA-4jpc-fv5p-mh98.