4G Router DX-3021: Improper Neutralization of Special Elements used in a Command
CVE-2022-4616 is a critical-severity improper neutralization of special elements used in a command vulnerability in 4G Router DX-3021 from Delta Industrial Automation, with a CVSS 3.1 base score of 9.1 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 1.24 as the first without the flaw, so updating 4G Router DX-3021 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 5% chance of exploitation within 30 days, which is in the top 7.63% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update 4G Router DX-3021 to 1.24 or a later version.
- Update Dx-3021l9 Firmware to 1.24 or a later version.
- Read the advisory on downloadcenter.deltaww.com for workarounds and exact fixed builds.
- 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 |
|---|---|---|---|
| Delta Industrial Automation | 4G Router DX-3021 | before 1.24 | 1.24 |
| Deltaww | Dx-3021l9 Firmware | before 1.24 | 1.24 |
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
- HighData or code can be modified at will.
- 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:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | CNA (hq.dhs.gov) |
| CVSS 3.1 | 9.1 | Critical | NVD |
Official description
The webserver in Delta DX-3021 versions prior to 1.24 is vulnerable to command injection through the network diagnosis page. This vulnerability could allow a remote unauthenticated user to add files, delete files, and change file permissions.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in a Command
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- If possible, ensure that all external commands called from the program are statically created.
- Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- cisa.gov/uscert/ics/advisories/icsa-22-354-05Third Party Advisory, US Government Resource
Recent Improper Neutralization of Special Elements used in a Command vulnerabilities
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 9.9 Critical severity
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