Aterm WG2600HP2: Improper Neutralization of Special Elements used in an OS Command
CVE-2023-3333 is a high-severity improper neutralization of special elements used in an OS command vulnerability in Aterm WG2600HP2 from NEC, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected Aterm WG2600HP2 versions: all versions. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.71% chance of exploitation within 30 days, higher than 54% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Aterm WG2600HP2 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| NEC | Aterm WG2600HP2 | all versions | Not stated |
| NEC | Aterm WG2600HP | all versions | Not stated |
| NEC | Aterm WG2200HP | all versions | Not stated |
| NEC | Aterm WG1800HP2 | all versions | Not stated |
| NEC | Aterm WG1800HP | all versions | Not stated |
| NEC | Aterm WG1400HP | all versions | Not stated |
| NEC | Aterm WG600HP | all versions | Not stated |
| NEC | Aterm WG300HP | all versions | Not stated |
| NEC | Aterm WF300HP | all versions | Not stated |
| NEC | Aterm WR9500N | all versions | Not stated |
| NEC | Aterm WR9300N | all versions | Not stated |
| NEC | Aterm WR8750N | all versions | Not stated |
| NEC | Aterm WR8700N | all versions | Not stated |
| NEC | Aterm WR8600N | all versions | Not stated |
| NEC | Aterm WR8370N | all versions | Not stated |
| NEC | Aterm WR8175N | all versions | Not stated |
| NEC | Aterm WR8170N | all versions | Not stated |
| Nec | Aterm Wf300hp Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg1400hp Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg1800hp Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg1800hp2 Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg2200hp Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg2600hp Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg2600hp2 Firmware | Not specified in the record | Not stated |
| Nec | Aterm Wg300hp Firmware | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE; 9 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
- HighAdministrator-level access is required first.
- 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:H/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
Official description
Improper Neutralization of Special Elements used in an OS Command vulnerability in NEC Corporation Aterm WG2600HP2, WG2600HP, WG2200HP, WG1800HP2, WG1800HP, WG1400HP, WG600HP, WG300HP, WF300HP, WR9500N, WR9300N, WR8750N, WR8700N, WR8600N, WR8370N, WR8175N and WR8170N all versions allows a attacker to execute an arbitrary OS command with the root privilege, after obtaining a high privilege exploiting CVE-2023-3330 and CVE-2023-3331 vulnerabilities.
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: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 7.2 High severity
- 8.0 High severity
- 7.2 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
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