cabinet c520: Improper Authentication
CVE-2022-2302 is a critical-severity improper authentication vulnerability in cabinet c520 from Lenze, 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 V01.08.01.3021 as the first without the flaw, so updating cabinet c520 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 2.19% chance of exploitation within 30 days, higher than 83% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update cabinet c520 to V01.08.01.3021 or a later version.
- Update cabinet c550 to V01.08.01.3021 or a later version.
- Update cabinet c750 to V01.08.01.3021 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 |
|---|---|---|---|
| LENZE | cabinet c520 | V01.07.00.2757 up to, but not including, V01.08.01.3021 | V01.08.01.3021 |
| LENZE | cabinet c550 | V01.07.00.2757 up to, but not including, V01.08.01.3021 | V01.08.01.3021 |
| LENZE | cabinet c750 | V01.07.00.2757 up to, but not including, V01.08.01.3021 | V01.08.01.3021 |
| Lenze | C520 Firmware | 1.07.00.2757 up to, but not including, 01.08.01.3021 | 01.08.01.3021 |
| Lenze | C550 Firmware | 1.07.00.2757 up to, but not including, 01.08.01.3021 | 01.08.01.3021 |
| Lenze | C750 Firmware | 1.07.00.2757 up to, but not including, 01.08.01.3021 | 01.08.01.3021 |
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 NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.8 | Critical | CNA (cert.vde.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
| CVSS 2.0 | 9.3 | High | NVD |
Official description
Multiple Lenze products of the cabinet series skip the password verification upon second login. After a user has been logged on to the device once, a remote attacker can get full access without knowledge of the password.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
How developers prevent this class of flaw
- Use an authentication framework or library such as the OWASP ESAPI Authentication feature.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- cert.vde.com/en/advisories/VDE-2022-030/Mitigation, Third Party Advisory
Recent Improper Authentication vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 8.1 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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