Compact Controller CC100: Improper Neutralization of Special Elements used in an OS Command
CVE-2023-1698 is a critical-severity improper neutralization of special elements used in an OS command vulnerability in Compact Controller CC100 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. Affected Compact Controller CC100 versions: FW20 through FW22; FW23. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 81.9% chance of exploitation within 30 days, which is in the top 0.34% of all scored CVEs.
Exploitation in the next 30 days is more likely than not, according to EPSS.
What to do
- Check which version of Compact Controller CC100 you run against the affected versions below, and install the vendor's latest release.
- 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 | Compact Controller CC100 | FW20 through FW22; FW23 | Not stated |
| WAGO | Edge Controller | FW22 | Not stated |
| WAGO | PFC100 | FW20 through FW22; FW23 | Not stated |
| WAGO | PFC200 | FW20 through FW22; FW23 | Not stated |
| WAGO | Touch Panel 600 Advanced Line | FW22 | Not stated |
| WAGO | Touch Panel 600 Marine Line | FW22 | Not stated |
| WAGO | Touch Panel 600 Standard Line | FW22 | Not stated |
| Wago | Compact Controller 100 Firmware | 20 through 23 | Not stated |
| Wago | Edge Controller Firmware | 22 | Not stated |
| Wago | Pfc100 Firmware | 20 through 23 | Not stated |
| Wago | Pfc200 Firmware | 20 through 23 | Not stated |
| Wago | Touch Panel 600 Advanced Firmware | 22 | Not stated |
| Wago | Touch Panel 600 Marine Firmware | 22 | Not stated |
| Wago | Touch Panel 600 Standard Firmware | 22 | 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
- 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
In multiple products of WAGO a vulnerability allows an unauthenticated, remote attacker to create new users and change the device configuration which can result in unintended behaviour, Denial of Service and full system compromise.
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
Third-party and government advisories
- cert.vde.com/en/advisories/VDE-2023-007/Third Party Advisory
Other vulnerabilities in Compact Controller CC100
- 7.5 High severity
Recent Improper Neutralization of Special Elements used in an OS Command vulnerabilities
- 9.8 Critical severity
- 7.2 High severity
- 9.9 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
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