CyberSecBulletin
CVE-2024-33687NVD status: Modified

NJ Series CPU Unit: Insufficient Verification of Data Authenticity

Published Updated By the CyberSecBulletin desk

CVE-2024-33687 is a high-severity insufficient verification of data authenticity vulnerability in NJ Series CPU Unit from Omron, 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. Affected NJ Series CPU Unit versions: all versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.19% 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 NJ Series CPU Unit you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on fa.omron.co.jp 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
OMRONNJ Series CPU Unitall versionsNot stated
OMRONNX Series CPU Unitall versionsNot stated
OmronNj101-1000 FirmwareNot specified in the recordNot stated
OmronNj101-1020 FirmwareNot specified in the recordNot stated
OmronNj101-9000 FirmwareNot specified in the recordNot stated
OmronNj101-9020 FirmwareNot specified in the recordNot stated
OmronNj301-1100 FirmwareNot specified in the recordNot stated
OmronNj301-1200 FirmwareNot specified in the recordNot stated
OmronNj501-1300 FirmwareNot specified in the recordNot stated
OmronNj501-1320 FirmwareNot specified in the recordNot stated
OmronNj501-1340 FirmwareNot specified in the recordNot stated
OmronNj501-140 FirmwareNot specified in the recordNot stated
OmronNj501-1400 FirmwareNot specified in the recordNot stated
OmronNj501-1420 FirmwareNot specified in the recordNot stated
OmronNj501-1500 FirmwareNot specified in the recordNot stated
OmronNj501-1520 FirmwareNot specified in the recordNot stated
OmronNj501-4300 FirmwareNot specified in the recordNot stated
OmronNj501-4310 FirmwareNot specified in the recordNot stated
OmronNj501-4320 FirmwareNot specified in the recordNot stated
OmronNj501-4400 FirmwareNot specified in the recordNot stated
OmronNj501-4500 FirmwareNot specified in the recordNot stated
OmronNj501-5300 FirmwareNot specified in the recordNot stated
OmronNj501-5300-1 FirmwareNot specified in the recordNot stated
OmronNj501-r300 FirmwareNot specified in the recordNot stated
OmronNj501-r320 FirmwareNot specified in the recordNot stated

Version data comes from the organisation that assigned the CVE; 32 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 3.17.5HighNVD
CVSS 3.17.5HighCISA (ADP)

Official description

Insufficient verification of data authenticity issue exists in NJ Series CPU Unit all versions and NX Series CPU Unit all versions. If a user program in the affected product is altered, the product may not be able to detect the alteration.

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

The underlying weakness: Insufficient Verification of Data Authenticity

The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.

More Insufficient Verification of Data Authenticity vulnerabilities (CWE-345)

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

Third-party and government advisories

Recent Insufficient Verification of Data Authenticity vulnerabilities

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