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9yf88a FirmwareOperating system · Hp

CVE-2024-9423

MEDIUM · 5.3 CVSS v3.1 Published 2024-10-02
Fix available
A fix is available. Upgrade to 2024-08-13 or later.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Certain HP LaserJet printers may potentially experience a denial of service when a user sends a raw JPEG file to the printer. The printer displays a “JPEG Unsupported” message which may not clear, potentially blocking queued print jobs.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

HP LaserJet printers suffer from a denial of service vulnerability when processing raw JPEG files. Sending a crafted JPEG to the printer causes a 'JPEG Unsupported' error message to appear that may not clear, preventing subsequent print jobs from processing and effectively blocking the print queue.

MitigationApply available HP firmware updates for affected LaserJet models. Until patches are available, avoid sending raw JPEG files directly to the printer and use print drivers that handle image conversion before sending to the device.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
9yf88a FirmwareOperating system
Affected:< 2024-08-13
9yf89a FirmwareOperating system
Affected:< 2024-08-13
9yf90a FirmwareOperating system
Affected:< 2024-08-13
9yf91a FirmwareOperating system
Affected:< 2024-08-13
9yf91e FirmwareOperating system
Affected:< 2024-08-13
9yf92a FirmwareOperating system
Affected:< 2024-08-13
9yf94a FirmwareOperating system
Affected:< 2024-08-13
9yf95a FirmwareOperating system
Affected:< 2024-08-13

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify printer model
    Check the product label on the printer or access the printer's embedded web server (EWS) via web browser to view the device information page
    Affected if The model number matches one of: 9yf88a, 9yf89a, 9yf90a, 9yf91a, 9yf91e, 9yf92a, 9yf94a, or 9yf95a
  2. Check firmware version
    Access the printer's EWS and navigate to the 'General' or 'Information' page to view the current firmware date and version, or print a configuration page from the printer's control panel
    Affected if The firmware date is before August 13, 2024 (2024-08-13)
  3. Determine raw JPEG printing exposure
    Review print job sources: check if any direct print applications, scripts, or workflows send raw JPEG files directly to the printer's IP address or port 9100 without using a print driver
    Affected if Raw JPEG files are sent directly to the printer without driver-based conversion
  4. Check for exploitation symptoms
    Examine the printer control panel display or EWS status page for a persistent 'JPEG Unsupported' error message, and review the print queue for blocked jobs
    Affected if The 'JPEG Unsupported' error is present and print jobs remain stuck in the queue

You are affected if your printer model is one of the listed HP LaserJet variants AND the firmware predates the 2024-08-13 update AND raw JPEG files can be sent directly to the device.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 2024-08-13 or later
Fixed in 2024-08-13
Interim mitigation

Apply available HP firmware updates for affected LaserJet models. Until patches are available, avoid sending raw JPEG files directly to the printer and use print drivers that handle image conversion before sending to the device.

Recommended fix Moderate confidence

HP LaserJet firmware version dated 2024-08-13 or later for models 9yf88a, 9yf89a, 9yf90a, 9yf91a, 9yf91e, 9yf92a, 9yf94a, 9yf95a

  1. Identify the exact HP LaserJet model number (9yf88a, 9yf89a, 9yf90a, 9yf91a, 9yf91e, 9yf92a, 9yf94a, or 9yf95a) from the printer label or control panel
  2. Access the printer's embedded web server (EWS) by entering the printer's IP address in a web browser
  3. Navigate to the 'General' or 'Firmware' tab to check the current firmware version
  4. Compare the installed firmware date against 2024-08-13; versions dated before this date are vulnerable
  5. Download the latest firmware update from HP support (support.hp.com) for your specific model
  6. In the EWS firmware update section, browse to the downloaded firmware file and initiate the update
  7. Wait for the firmware update to complete (do not power off the printer during this process)
  8. After the printer restarts, verify the new firmware version displays a date of 2024-08-13 or later
Caveat Standard firmware update risks apply - ensure stable power during update; some settings may reset to defaults

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in 9yf88a Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,100
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-9423 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data