CyberSecBulletin
CVE-2024-33610NVD status: Deferred

Multiple MFPs (multifunction printers): Authentication Bypass Using an Alternate Path or Channel

Published Updated By the CyberSecBulletin desk

CVE-2024-33610 is a critical-severity authentication bypass using an alternate path or channel vulnerability in Multiple MFPs (multifunction printers) from Sharp, with a CVSS 3.1 base score of 9.1 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 50.5% chance of exploitation within 30 days, which is in the top 1.07% of all scored CVEs.

Patch now

Exploitation in the next 30 days is more likely than not, according to EPSS.

What to do

  1. Check which version of Multiple MFPs (multifunction printers) you run against the affected versions below, and install the vendor's latest release.
  2. 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
SharpMultiple MFPs (multifunction printers)Not specified in the recordNot stated
Toshiba TecMultiple MFPs (multifunction printers)Not specified in the recordNot stated

Version data comes from the organisation that assigned the CVE. 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
HighAll data handled by the component can be read.
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:H/I:H/A:N. Scored by CNA (jpcert.or.jp).

Official description

"sessionlist.html" and "sys_trayentryreboot.html" are accessible with no authentication. "sessionlist.html" provides logged-in users' session information including session cookies, and "sys_trayentryreboot.html" allows to reboot the device. As for the details of affected product names, model numbers, and versions, refer to the information provided by the respective vendors listed under [References].

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

The underlying weakness: Authentication Bypass Using an Alternate Path or Channel

The product requires authentication, but the product has an alternate path or channel that does not require authentication.

How developers prevent this class of flaw

  • Funnel all access through a single choke point to simplify how users can access a resource. For every access, perform a check to determine if the user has permissions to access the resource.

More Authentication Bypass Using an Alternate Path or Channel vulnerabilities (CWE-288)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in Multiple MFPs (multifunction printers)

All Multiple MFPs (multifunction printers) vulnerabilities

Recent Authentication Bypass Using an Alternate Path or Channel vulnerabilities

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