Remote Compact Controller (RCC) 972: Excessive Reliance on Global Variables
CVE-2022-2642 is a high-severity excessive reliance on global variables vulnerability in Remote Compact Controller (RCC) 972 from Horner Automation, 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 Remote Compact Controller (RCC) 972 versions: Firmware Version 15.40. The record does not name a fixed version, so check the vendor advisory. 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
- Check which version of Remote Compact Controller (RCC) 972 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 |
|---|---|---|---|
| Horner Automation | Remote Compact Controller (RCC) 972 | Firmware Version 15.40 | Not stated |
| Hornerautomation | Rcc972 Firmware | 15.40 | 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
- 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.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
Horner Automation’s RCC 972 firmware version 15.40 contains global variables. This could allow an attacker to read out sensitive values and variable keys from the device.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Excessive Reliance on Global Variables
The code is structured in a way that relies too much on using or setting global variables throughout various points in the code, instead of preserving the associated information in a narrower, more local context.
More Excessive Reliance on Global Variables vulnerabilities (CWE-1108)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- cisa.gov/uscert/ics/advisories/icsa-22-335-02Third Party Advisory, US Government Resource
Other vulnerabilities in Remote Compact Controller (RCC) 972
- 9.8 Critical severity
- 7.5 High severity
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