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Mf642cdw FirmwareOperating system · Canon

CVE-2023-0858

MEDIUM · 5.3 CVSS v3.1 Published 2023-05-11
Fix available
A fix is available. Upgrade to after 11.04 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
Improper Authentication of RemoteUI of Office / Small Office Multifunction Printers and Laser Printers(*) which may allow an attacker on the network segment to trigger unauthorized access to the product. *:Satera LBP660C Series/LBP620C Series/MF740C Series/MF640C Series firmware Ver.11.04 and earlier sold in Japan. Color imageCLASS LBP660C Series/LBP 620C Series/X LBP1127C/MF740C Series/MF640C Series/X MF1127C firmware Ver.11.04 and earlier sold in US. i-SENSYS LBP660C Series/LBP620C Series/MF740C Series/MF640C Series, C1127P, C1127iF, C1127i firmware Ver.11.04 and earlier sold in Europe.

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

Improper authentication in the RemoteUI web interface of Canon multifunction and laser printers allows an unauthenticated attacker on the same network segment to gain unauthorized access to the device. The vulnerability affects RemoteUI authentication in Satera, Color imageCLASS, and i-SENSYS printer firmware versions 11.04 and earlier.

MitigationUpdate printer firmware to version 11.05 or later. As a compensating control, restrict network access to the RemoteUI interface using VLAN segmentation or firewall rules to limit exposure to trusted network segments.

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
Mf642cdw FirmwareOperating system
Affected:<= 11.04
Mf644cdw FirmwareOperating system
Affected:<= 11.04
Mf741cdw FirmwareOperating system
Affected:<= 11.04
Mf743cdw FirmwareOperating system
Affected:<= 11.04
Mf745cdw FirmwareOperating system
Affected:<= 11.04
Lbp621c FirmwareOperating system
Affected:<= 11.04
Lbp622c FirmwareOperating system
Affected:<= 11.04
Lbp661c FirmwareOperating system
Affected:<= 11.04

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
Low
Integrity
None
Availability
None

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

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
    Access the printer web interface (RemoteUI) or print a configuration page to confirm the exact model number. Compare against the list: MF642cdw, MF644cdw, MF741cdw, MF743cdw, MF745cdw, LBP621c, LBP622c, LBP661c.
    Affected if The printer model is one of the eight affected models listed.
  2. Check firmware version
    In the RemoteUI web interface, navigate to the Settings or Device Information section to view the current firmware version. Alternatively, print a configuration/test page which typically lists the firmware version.
    Affected if The installed firmware version is 11.04 or earlier.
  3. Confirm RemoteUI is enabled
    Access the RemoteUI web interface by entering the printer IP address in a web browser. Check the Settings or Administration pages to verify if the RemoteUI service is currently enabled.
    Affected if RemoteUI is enabled and accessible on the network.
  4. Assess network exposure
    Verify whether the printer IP address is reachable from network segments that contain untrusted users or guest devices. Check VLAN configuration and firewall rules protecting the printer.
    Affected if The RemoteUI interface is reachable from network segments with untrusted or unauthenticated users.

You are affected if you have one of the eight Canon printer models with firmware version 11.04 or earlier, and RemoteUI is enabled and accessible from your network.

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.

From vendor data
Upgrade available Upgrade to a release after 11.04
Interim mitigation

Update printer firmware to version 11.05 or later. As a compensating control, restrict network access to the RemoteUI interface using VLAN segmentation or firewall rules to limit exposure to trusted network segments.

Fix this in Mf642cdw Firmware Scoped from the published advisory
  • Consultation3.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,440
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Scan for this in your stack

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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-2023-0858 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