Sysmac Cs1 Firmware: Cleartext Storage of Sensitive Information
CVE-2022-31205 is a high-severity cleartext storage of sensitive information vulnerability in Sysmac Cs1 Firmware 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. The record lists version 4.1 as the first without the flaw, so updating Sysmac Cs1 Firmware to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.68% chance of exploitation within 30 days, higher than 53% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Sysmac Cs1 Firmware to 4.1 or a later version.
- Update Sysmac Cj2m Firmware to 2.1 or a later version.
- Update Sysmac Cj2h Firmware to 1.5 or a later version.
- 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 | Sysmac Cs1 Firmware | before 4.1 | 4.1 |
| Omron | Sysmac Cj2m Firmware | before 2.1 | 2.1 |
| Omron | Sysmac Cj2h Firmware | before 1.5 | 1.5 |
| Omron | Sysmac Cp1e Firmware | before 1.30 | 1.30 |
| Omron | Sysmac Cp1h Firmware | before 1.30 | 1.30 |
| Omron | Sysmac Cp1l Firmware | before 1.10 | 1.10 |
| Omron | Cp1w-cif41 Firmware | Not specified in the record | Not stated |
Version data comes from NVD's product matching. 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
- NoneNothing can be modified.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. Scored by NVD.
Official description
In Omron CS series, CJ series, and CP series PLCs through 2022-05-18, the password for access to the Web UI is stored in memory area D1449...D1452 and can be read out using the Omron FINS protocol without any further authentication.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Cleartext Storage of Sensitive Information
The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.
How developers prevent this class of flaw
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to encrypt the data at rest.
- In some systems/environments such as cloud, the use of double encryption (at both the software and hardware layer) might be required, and the developer might be solely responsible for both layers, instead of shared responsibility with the administrator of the broader system/environment.
More Cleartext Storage of Sensitive Information vulnerabilities (CWE-312)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cisa.gov/uscert/ics/advisories/icsa-22-179-02Third Party Advisory, US Government Resource
- forescout.com/blog/Third Party Advisory
Other vulnerabilities in Sysmac Cs1 Firmware
- 9.8 Critical severity
- 7.5 High severity
Recent Cleartext Storage of Sensitive Information vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.8 High severity
- 9.1 Critical severity
- 9.8 Critical severity
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