Industrial Managed Switch (0852-0602): Improper Neutralization of Special Elements used in an OS Command
CVE-2023-4149 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in Industrial Managed Switch (0852-0602) from WAGO, 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. The record lists version 1.0.6.S0 as the first without the flaw, so updating Industrial Managed Switch (0852-0602) to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.12% chance of exploitation within 30 days, higher than 67% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Industrial Managed Switch (0852-0602) to 1.0.6.S0 or a later version.
- Update Industrial Managed Switch (0852-0603) to 1.0.6.S0 or a later version.
- Update Industrial Managed Switch (0852-1605) to 1.2.5.S0 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 |
|---|---|---|---|
| WAGO | Industrial Managed Switch (0852-0602) | before 1.0.6.S0 | 1.0.6.S0 |
| WAGO | Industrial Managed Switch (0852-0603) | before 1.0.6.S0 | 1.0.6.S0 |
| WAGO | Industrial Managed Switch (0852-1605) | before 1.2.5.S0 | 1.2.5.S0 |
| Wago | 0852-0602 Firmware | before 1.0.6.s0 | 1.0.6.s0 |
| Wago | 0852-0603 Firmware | before 1.0.6.s0 | 1.0.6.s0 |
| Wago | 0852-1605 Firmware | before 1.2.5.s0 | 1.2.5.s0 |
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
- 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 CNA (cert.vde.com).
Official description
A vulnerability in the web-based management allows an unauthenticated remote attacker to inject arbitrary system commands and gain full system control. Those commands are executed with root privileges. The vulnerability is located in the user request handling of the web-based management.
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.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cert.vde.com/en/advisories/VDE-2023-037Third Party Advisory
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 9.8 Critical severity
- 8.0 High severity
- 9.8 Critical severity
- 7.2 High severity
- 8.8 High severity
- 7.2 High severity
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