smart_lock_v3_pro: Improper Certificate Validation
CVE-2022-32509 is a high-severity improper certificate validation vulnerability in smart_lock_v3_pro from Nuki, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. The record lists version 3.3.5 as the first without the flaw, so updating smart_lock_v3_pro to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update smart_lock_v3_pro to 3.3.5 or a later version.
- Update bridge_v1 to 1.22.0 or a later version.
- Update bridge_v2 to 2.13.2 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Nuki | smart_lock_v3_pro | before 3.3.5 | 3.3.5 |
| Nuki | bridge_v1 | before 1.22.0 | 1.22.0 |
| Nuki | bridge_v2 | before 2.13.2 | 2.13.2 |
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
- AdjacentThe attacker must be on the same local network segment.
- 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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).
Official description
An issue was discovered on certain Nuki Home Solutions devices. Lack of certificate validation on HTTP communications allows attackers to intercept and tamper data. This affects Nuki Smart Lock 3.0 before 3.3.5, Nuki Bridge v1 before 1.22.0 and Nuki Bridge v2 before 2.13.2.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How developers prevent this class of flaw
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
More Improper Certificate Validation vulnerabilities (CWE-295)
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).
References
Other references
Other vulnerabilities in smart_lock_v3_pro
- 8.8 High severity
- 7.1 High severity
Recent Improper Certificate Validation vulnerabilities
- 7.8 High severity
- 8.8 High severity
- 9.8 Critical severity
- 8.1 High severity
- 8.1 High severity
- 7.5 High severity
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