MZK-MF300N: Improper Neutralization of Special Elements used in a Command
CVE-2024-30220 is a high-severity improper neutralization of special elements used in a command vulnerability in MZK-MF300N from PLANEX COMMUNICATIONS, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. Affected MZK-MF300N versions: all firmware versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.01% chance of exploitation within 30 days, higher than 64% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of MZK-MF300N you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| PLANEX COMMUNICATIONS | MZK-MF300N | all firmware versions | Not stated |
| PLANEX COMMUNICATIONS | MZK-MF300HP2 | firmware versions 1.18 and earlier | Not stated |
| Planex | mzk-mf300n_firmware | all versions | Not stated |
| Planex | Mzk-mf300hp2 Firmware | 1.18 and earlier | 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
- AdjacentThe attacker must be on the same local network segment.
- 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
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (jpcert.or.jp).
Official description
Command injection vulnerability in PLANEX COMMUNICATIONS wireless LAN routers allows a network-adjacent unauthenticated attacker to execute an arbitrary command by sending a specially crafted request to a certain port. Note that MZK-MF300N is no longer supported, therefore the update for this product is not provided.
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
Third-party and government advisories
- jvn.jp/en/vu/JVNVU91975826/Third Party Advisory
Recent Improper Neutralization of Special Elements used in a Command vulnerabilities
- 10.0 Critical severity
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 8.0 High severity
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