CyberSecBulletin
CVE-2023-0857NVD status: Modified

Canon Office/Small Office Multifunction…: Incorrect User Management

Published Updated By the CyberSecBulletin desk

CVE-2023-0857 is a high-severity incorrect user management vulnerability in Canon Office/Small Office Multifunction Printers and Laser Printers from Canon, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.61% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of Canon Office/Small Office Multifunction Printers and Laser Printers you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on psirt.canon for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
CanonCanon Office/Small Office Multifunction Printers and Laser PrintersNot specified in the recordNot stated
CanonMf642cdw Firmware11.04 and earlierNot stated
CanonMf644cdw Firmware11.04 and earlierNot stated
CanonMf741cdw Firmware11.04 and earlierNot stated
CanonMf743cdw Firmware11.04 and earlierNot stated
CanonMf745cdw Firmware11.04 and earlierNot stated
CanonLbp621c Firmware11.04 and earlierNot stated
CanonLbp622c Firmware11.04 and earlierNot stated
CanonLbp661c Firmware11.04 and earlierNot stated
CanonLbp662c Firmware11.04 and earlierNot stated
CanonLbp664c Firmware11.04 and earlierNot stated
CanonMf1127c Firmware11.04 and earlierNot stated
CanonMf262dw Ii Firmware11.04 and earlierNot stated
CanonMf264dw Ii Firmware11.04 and earlierNot stated
CanonMf267dw Ii Firmware11.04 and earlierNot stated
CanonMf269dw Ii Firmware11.04 and earlierNot stated
CanonMf269dw Vp Ii Firmware11.04 and earlierNot stated
CanonMf272dw Firmware11.04 and earlierNot stated
CanonMf273dw Firmware11.04 and earlierNot stated
CanonMf275dw Firmware11.04 and earlierNot stated
CanonMf641cw Firmware11.04 and earlierNot stated
CanonMf746cdw Firmware11.04 and earlierNot stated
CanonLbp122dw Firmware11.04 and earlierNot stated
CanonLbp1127c Firmware11.04 and earlierNot stated
CanonLbp622cdw Firmware11.04 and earlierNot stated

Version data comes from the organisation that assigned the CVE; 21 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.15.9MediumCNA
CVSS 3.17.5HighNVD

Official description

Unintentional change of settings during initial registration of system administrators which uses control protocols. The affected Office / Small Office Multifunction Printers and Laser Printers(*) 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.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Incorrect User Management

The product does not properly manage a user within its environment.

More Incorrect User Management vulnerabilities (CWE-286)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Canon Office/Small Office Multifunction Printers and Laser Printers

All Canon Office/Small Office Multifunction Printers and Laser Printers vulnerabilities

Recent Incorrect User Management vulnerabilities

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