CVE-2024-0407: HP FutureSmart 4 Information Disclosure Flaw

CVE-2024-0407 Overview

CVE-2024-0407 is an information disclosure vulnerability affecting certain HP Enterprise LaserJet and HP LaserJet Managed printers running FutureSmart 3, FutureSmart 4, and FutureSmart 5 firmware. The device may trust outbound Transport Layer Security (TLS) connections to services enabled by some solutions without validating the appropriate Certificate Authority (CA) certificate against the device's certificate store. Because the printer does not enforce trust anchor checks, a network-positioned attacker could intercept these connections and read data intended for a legitimate backend service. The flaw is network-exploitable, requires no authentication, and no user interaction. HP published a security advisory tracking the issue against a broad hardware catalog. The weakness is categorized as [NVD-CWE-noinfo] because HP did not publish a specific CWE mapping.

Critical Impact
A network-adjacent attacker can perform a machine-in-the-middle attack against outbound solution traffic from the printer, disclosing confidential data transmitted from the device to trusted backend services.

Affected Products

HP FutureSmart firmware versions 3, 4, and 5
HP Enterprise LaserJet printer families (multiple SKUs including A2W75A, CF066A, B3G84A, CC522A, CZ244A series)
HP LaserJet Managed printer families (multiple SKUs including L3U51A, L3U63A, L3U49A, J8A04A, T3U51A series)

Discovery Timeline

2024-02-21 - CVE-2024-0407 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-0407

Vulnerability Analysis

The vulnerability affects outbound connections the printer establishes back to services enabled by certain HP solutions. During the TLS handshake, the printer accepts the presented server certificate without verifying that it chains to a trusted CA stored in the device's certificate store. This is a certificate validation failure that undermines the confidentiality guarantees of TLS. Because the attack path traverses the network and no credentials are required, an adversary with a foothold on the same network segment or with control over an upstream routing device can intercept, decrypt, and inspect the traffic. Data returned by, or sent to, the solution service is exposed. Integrity of primary print workflows is not directly impacted, but availability of the affected solution can be degraded during interception.

Root Cause

The root cause is missing or improper certificate authority validation for the specific outbound service trust path used by supported solutions. Rather than binding the connection to a known CA already provisioned in the printer's trust store, the device treats the endpoint as trusted implicitly, leaving no cryptographic anchor to detect an impostor server.

Attack Vector

An attacker positioned between the affected printer and the backend solution service performs a machine-in-the-middle attack. Techniques include ARP spoofing on the local LAN, rogue DHCP or DNS responses, or compromise of an intermediate network device. Because the printer does not reject an unknown CA, the attacker's substitute TLS endpoint terminates the connection and forwards traffic while capturing plaintext.

No verified public exploit code is available. See the HP Security Document for vendor-provided technical details.

Detection Methods for CVE-2024-0407

Indicators of Compromise

Unexpected TLS certificates presented to the printer that do not chain to a CA installed in the device's certificate store.
Outbound printer connections resolving to unfamiliar hosts or IP addresses that were not previously observed for solution telemetry.
ARP table anomalies or duplicate MAC entries on VLANs containing HP FutureSmart printers.

Detection Strategies

Inspect the printer's Embedded Web Server (EWS) certificate store and compare installed CA certificates against those expected by the deployed HP solutions.
Monitor egress traffic from print segments for TLS handshakes to unexpected destinations, ports, or Server Name Indication (SNI) values.
Correlate DNS query patterns from printer IP ranges to detect resolution of unauthorized service endpoints.

Monitoring Recommendations

Enable NetFlow or IPFIX on switches serving print VLANs and baseline normal peer destinations for each printer.
Forward printer syslog and HP Web Jetadmin events to a central log platform for correlation of firmware version, certificate errors, and configuration changes.
Alert on ARP spoofing and DHCP snooping violations on network segments containing FutureSmart 3, 4, or 5 devices.

How to Mitigate CVE-2024-0407

Immediate Actions Required

Inventory all HP LaserJet Enterprise and LaserJet Managed devices and identify firmware generation (FutureSmart 3, 4, or 5).
Apply the firmware updates listed in HP's advisory to affected models as soon as they are validated in a test environment.
Install the correct CA certificates required by deployed HP solutions into each device's certificate store.
Restrict outbound network access from printer VLANs to only the specific solution service endpoints required for business operations.

Patch Information

HP has released firmware updates addressing the affected FutureSmart 3, 4, and 5 platforms. Refer to the HP Security Document for the authoritative list of impacted models and the corresponding fixed firmware versions.

Workarounds

Isolate printers on a dedicated management VLAN with strict egress access-control lists to the known solution service IP addresses.
Disable printer-integrated solutions that trigger the affected outbound connection if not required for business operations.
Enforce switch-level protections such as Dynamic ARP Inspection and DHCP snooping to reduce feasibility of on-path interception.

bash

# Configuration example: restrict printer egress to a known solution service (Cisco IOS)
ip access-list extended PRINTER_EGRESS
 permit tcp 10.20.30.0 0.0.0.255 host 203.0.113.25 eq 443
 deny   ip 10.20.30.0 0.0.0.255 any log
interface Vlan30
 ip access-group PRINTER_EGRESS out