Machine Automation Controller NJ-series: Least Privilege Violation
CVE-2025-1384 is a high-severity least privilege violation vulnerability in Machine Automation Controller NJ-series from Omron, with a CVSS 3.1 base score of 7.0 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Machine Automation Controller NJ-series versions: NJ101-[][][][] Ver.1.67.00 or lower; NJ301-1[]00 Ver.1.67.00 or lower; NJ501-1[]00 Ver.1.67.02 or lower, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.26% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Machine Automation Controller NJ-series you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| OMRON | Machine Automation Controller NJ-series | NJ101-[][][][] Ver.1.67.00 or lower; NJ301-1[]00 Ver.1.67.00 or lower; NJ501-1[]00 Ver.1.67.02 or lower; NJ501-1[]20 Ver.1.68.01 or lower; NJ501-1340 Ver.1.67.00 or lower; NJ501-4[][][] Ver.1.67.00 or lower; NJ501-5300 Ver.1.67.01 or lower; NJ501-R[]00 Ver.1.67.01 or lower; and 1 more ranges | Not stated |
| OMRON | Machine Automation Controller NX-series | NX102-[][][][] Ver.1.68.01 or lower; NX1P2-[][][][][][] Ver.1.64.09 or lower; NX1P2-[][][][][][]1 Ver.1.64.09 or lower; NX502-[][][][] Ver.1.68.01 or lower; NX701-[][][][] Ver.1.35.09 or lower | Not stated |
| OMRON | Sysmac Studio Software | SYSMAC-SE2[][][] all | Not 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
- HighSuccess depends on conditions outside the attacker's control.
- 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
- LowSome restricted data can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H. Scored by CNA.
Official description
Least Privilege Violation (CWE-272) Vulnerability exists in the communication function between the NJ/NX-series Machine Automation Controllers and the Sysmac Studio Software. An attacker may use this vulnerability to perform unauthorized access and to execute unauthorized code remotely to the controller products.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Least Privilege Violation
The elevated privilege level required to perform operations such as chroot() should be dropped immediately after the operation is performed.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in Machine Automation Controller NJ-series
- 7.2 High severity
Recent Least Privilege Violation vulnerabilities
- 7.3 High severity
- 8.2 High severity
- 7.8 High severity
- 7.8 High severity
- 8.4 High severity
- 7.8 High severity
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