FutureNet NXR-1300 series: Improper Neutralization of Special Elements used in an OS Command
CVE-2024-36491 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in FutureNet NXR-1300 series from Century Systems, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected FutureNet NXR-1300 series versions: firmware version 7.4.9 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.65% chance of exploitation within 30 days, higher than 52% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of FutureNet NXR-1300 series you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on centurysys.co.jp 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 |
|---|---|---|---|
| Century Systems | FutureNet NXR-1300 series | firmware version 7.4.9 and earlier | Not stated |
| Century Systems | FutureNet NXR-650 | firmware version 21.16.1 and earlier | Not stated |
| Century Systems | FutureNet NXR-610X series | firmware version 21.14.11 and earlier | Not stated |
| Century Systems | FutureNet NXR-530 | firmware version 21.11.13 and earlier | Not stated |
| Century Systems | FutureNet NXR-350/C | firmware version 5.30.9 and earlier | Not stated |
| Century Systems | FutureNet NXR-230/C | firmware version 5.30.12 and earlier | Not stated |
| Century Systems | FutureNet NXR-160/LW | firmware version 21.8.3 and earlier | Not stated |
| Century Systems | FutureNet NXR-G200 series | firmware version 9.12.15 and earlier | Not stated |
| Century Systems | FutureNet NXR-G180/L-CA | firmware version 21.7.28B and earlier | Not stated |
| Century Systems | FutureNet NXR-G120 series | firmware version 21.15.2 and earlier | Not stated |
| Century Systems | FutureNet NXR-G110 series | firmware version 21.7.30C and earlier | Not stated |
| Century Systems | FutureNet NXR-G100 series | firmware version 6.23.10 and earlier | Not stated |
| Century Systems | FutureNet NXR-G060 series | firmware version 21.15.5 and earlier | Not stated |
| Century Systems | FutureNet NXR-G050 series | firmware version 21.12.9 and earlier | Not stated |
| Century Systems | FutureNet VXR/x64 | firmware version 21.7.31 and earlier | Not stated |
| Century Systems | FutureNet VXR/x86 | firmware version 10.1.4 and earlier | Not stated |
| Century Systems | FutureNet NXR-1200 | firmware version 5.25.21 and earlier | Not stated |
| Century Systems | FutureNet NXR-130/C | firmware version 5.13.21 and earlier | Not stated |
| Century Systems | FutureNet NXR-155/C series | firmware version 5.22.5M and earlier | Not stated |
| Century Systems | FutureNet NXR-125/CX | firmware version 5.25.7H and earlier | Not stated |
| Century Systems | FutureNet NXR-120/C | firmware version 5.25.7H and earlier | Not stated |
| Century Systems | FutureNet WXR-250 | firmware version 1.4.7 and earlier | Not stated |
| Centurysys | futurenet_nxr-1300_firmware | 7.4.9 and earlier | Not stated |
| Centurysys | futurenet_nxr-650_firmware | 21.16.1 and earlier | Not stated |
| Centurysys | futurenet_nxr-610x_firmware | 21.14.11 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE; 19 further products are omitted here. 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
- 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:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 3.1 | 9.8 | Critical | CISA (ADP) |
Official description
FutureNet NXR series, VXR series and WXR series provided by Century Systems Co., Ltd. allow an administrative user to execute an arbitrary OS command, obtain and/or alter sensitive information, and cause a denial-of-service (DoS) condition.
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 an OS Command
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command before 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.
- For any data that will be used to generate a command to be executed, keep as much of that data out of external control as possible. For example, in web applications, this may require storing the data locally in the session's state instead of sending it out to the client in a hidden form field.
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
More Improper Neutralization of Special Elements used in an OS Command vulnerabilities (CWE-78)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Third-party and government advisories
- jvn.jp/en/vu/JVNVU96424864/Third Party Advisory
Other vulnerabilities in FutureNet NXR-1300 series
- 8.8 High severity
- 9.1 Critical severity
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 7.4 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
- 7.8 High severity
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