SEPCOS Control and Protection Relay firmware…: Improper Enforcement of Behavioral Workflow
CVE-2022-1667 is a high-severity improper enforcement of behavioral workflow vulnerability in SEPCOS Control and Protection Relay firmware package from Secheron, 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 1.23.21 as the first without the flaw, so updating SEPCOS Control and Protection Relay firmware package to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.31% chance of exploitation within 30 days, higher than 71% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update SEPCOS Control and Protection Relay firmware package to 1.23.21 or a later version.
- Update Sepcos Control And Protection Relay Firmware to 1.23.21 or 1.24.8 or 1.25.3, whichever matches your release line, 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 |
|---|---|---|---|
| Secheron | SEPCOS Control and Protection Relay firmware package | All versions up to, but not including, 1.23.21 | 1.23.21 |
| Secheron | Sepcos Control And Protection Relay Firmware | 1.23.0 up to, but not including, 1.23.21; 1.24.0 up to, but not including, 1.24.8; 1.25.0 up to, but not including, 1.25.3 | 1.23.21, 1.24.8, 1.25.3 |
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
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. 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 |
| CVSS 2.0 | 7.8 | High | NVD |
Official description
Client-side JavaScript controls may be bypassed by directly running a JS function to reboot the PLC (e.g., from the browser console) or by loading the corresponding, browser accessible PHP script
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Enforcement of Behavioral Workflow
The product supports a session in which more than one behavior must be performed by an actor, but it does not properly ensure that the actor performs the behaviors in the required sequence or timeframe.
More Improper Enforcement of Behavioral Workflow vulnerabilities (CWE-841)
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-22-174-03Mitigation, Third Party Advisory, US Government Resource
Other vulnerabilities in SEPCOS Control and Protection Relay firmware package
- 9.1 Critical severity
- 9.1 Critical severity
- 7.5 High severity
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