CVE-2023-22439

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.

Published: 2023-12-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-22439 is rated Low Risk (19/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.06%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-22439

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.19% 0.06% -0.13%
2 2025-11-18 0.06% 0.19% +0.14%
3 2024-11-17 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-22439

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.1 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 1.6 1.4 [email protected]
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2023-22439

Affected software / configurations for CVE-2023-22439

Vendor Product Version Raw CPE
gallagher controller_6000_firmware <= 8.50 cpe:2.3:o:gallagher:controller_6000_firmware:*:*:*:*:*:*:*:*
gallagher controller_6000_firmware >= 8.60, < 8.60.231116a cpe:2.3:o:gallagher:controller_6000_firmware:*:*:*:*:*:*:*:*
gallagher controller_6000_firmware >= 8.70, < 8.70.231204a cpe:2.3:o:gallagher:controller_6000_firmware:*:*:*:*:*:*:*:*
gallagher controller_6000_firmware >= 8.80, < 8.80.231204a cpe:2.3:o:gallagher:controller_6000_firmware:*:*:*:*:*:*:*:*
gallagher controller_6000_firmware >= 8.90, < 8.90.231204a cpe:2.3:o:gallagher:controller_6000_firmware:*:*:*:*:*:*:*:*
gallagher command_centre <= 8.50 cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
gallagher command_centre >= 8.60, < 8.60.231116a cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
gallagher command_centre >= 8.70, < 8.70.231204a cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
gallagher command_centre >= 8.80, < 8.80.231204a cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*
gallagher command_centre >= 8.90, < 8.90.231204a cpe:2.3:a:gallagher:command_centre:*:*:*:*:*:*:*:*

References for CVE-2023-22439

cvelogic Threat Intelligence