CVE-2023-22439

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-18 · updated 2026-06-17
Weakness: CWE-20

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.

Affected products

Gallagher Command Centre: through 8.50; from 8.60 before 8.60.231116a; from 8.70 before 8.70.231204a; from 8.80 before 8.80.231204a; from 8.90 before 8.90.231204a — fixed in 8.60.231116a, 8.70.231204a, 8.80.231204a, 8.90.231204a
Gallagher Controller 6000: through 8.50; from 8.60 before 8.60.231116a; from 8.70 before 8.70.231204a; from 8.80 before 8.80.231204a; from 8.90 before 8.90.231204a — fixed in 8.60.231116a, 8.70.231204a, 8.80.231204a, 8.90.231204a

How to fix

Upgrade to a fixed version: Gallagher Command Centre 8.60.231116a, 8.70.231204a, 8.80.231204a, 8.90.231204a; Gallagher Controller 6000 8.60.231116a, 8.70.231204a, 8.80.231204a, 8.90.231204a. Check the vendor advisory for mitigations.

References

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