CVE-2023-22439

Name: CVE-2023-22439
Creator: NVD / NIST
Published: 2023-12-18T22:15:07.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2023-22439 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. . EPSS estimates a 0.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS Probability

0.51%

39.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gallagher	Controller 6000 Firmware	<= 8.50
Gallagher	Controller 6000 Firmware	>= 8.60, < 8.60.231116a
Gallagher	Controller 6000 Firmware	>= 8.70, < 8.70.231204a
Gallagher	Controller 6000 Firmware	>= 8.80, < 8.80.231204a
Gallagher	Controller 6000 Firmware	>= 8.90, < 8.90.231204a
Gallagher	Command Centre	<= 8.50
Gallagher	Command Centre	>= 8.60, < 8.60.231116a
Gallagher	Command Centre	>= 8.70, < 8.70.231204a
Gallagher	Command Centre	>= 8.80, < 8.80.231204a
Gallagher	Command Centre	>= 8.90, < 8.90.231204a

References

https://security.gallagher.com/Security-Advisories/CVE-2023-22439Vendor Advisory
https://security.gallagher.com/Security-Advisories/CVE-2023-22439Vendor Advisory

Timeline

Published: Dec 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-22439?

How severe is CVE-2023-22439?

CVE-2023-22439 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2023-22439?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-22439?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST