Compact Controller CC100 (751-9301): Missing Authentication for Critical Functionality
CVE-2022-45138 is a critical-severity missing authentication for critical functionality vulnerability in Compact Controller CC100 (751-9301) 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 FW22 as the first without the flaw, so updating Compact Controller CC100 (751-9301) to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.74% chance of exploitation within 30 days, higher than 55% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update Compact Controller CC100 (751-9301) to FW22 or a later version.
- Update Edge Controller (752-8303/8000-002) to FW22 or a later version.
- Update PFC100 (750-81xx/xxx-xxx) to FW22 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 | Compact Controller CC100 (751-9301) | FW16 up to, but not including, FW22; FW23 | FW22 |
| WAGO | Edge Controller (752-8303/8000-002) | FW18 up to, but not including, FW22; FW23 | FW22 |
| WAGO | PFC100 (750-81xx/xxx-xxx) | FW16 up to, but not including, FW22; FW23 | FW22 |
| WAGO | PFC200 (750-82xx/xxx-xxx) | FW16 up to, but not including, FW22; FW23 | FW22 |
| WAGO | Touch Panel 600 Advanced Line (762-5xxx) | FW16 up to, but not including, FW22; FW23 | FW22 |
| WAGO | Touch Panel 600 Marine Line (762-6xxx) | FW16 up to, but not including, FW22; FW23 | FW22 |
| WAGO | Touch Panel 600 Standard Line (762-4xxx) | FW16 up to, but not including, FW22; FW23 | FW22 |
| Wago | 751-9301 Firmware | 16 up to, but not including, 22; 22; 23 | 22 |
| Wago | 752-8303/8000-002 Firmware | 18 up to, but not including, 22; 22; 23 | 22 |
| Wago | Pfc100 Firmware | 16 up to, but not including, 22; 22; 23 | 22 |
| Wago | Pfc200 Firmware | 16 up to, but not including, 22; 22; 23 | 22 |
| Wago | Touch Panel 600 Advanced Firmware | 16 up to, but not including, 22; 22; 23 | 22 |
| Wago | Touch Panel 600 Marine Firmware | 16 up to, but not including, 22; 22; 23 | 22 |
| Wago | Touch Panel 600 Standard Firmware | 16 up to, but not including, 22; 22; 23 | 22 |
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
The configuration backend of the web-based management can be used by unauthenticated users, although only authenticated users should be able to use the API. The vulnerability allows an unauthenticated attacker to read and set several device parameters that can lead to full compromise of the device.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How developers prevent this class of flaw
- 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.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.
More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cert.vde.com/en/advisories/VDE-2022-060/Third Party Advisory
Other vulnerabilities in Compact Controller CC100 (751-9301)
- 9.8 Critical severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
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