bridge_v1: Uncontrolled Resource Consumption
CVE-2022-32508 is a high-severity uncontrolled resource consumption vulnerability in bridge_v1 from Nuki, with a CVSS 3.1 base score of 7.5 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 1.22.0 as the first without the flaw, so updating bridge_v1 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.28% chance of exploitation within 30 days, higher than 71% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update bridge_v1 to 1.22.0 or a later version.
- Update bridge_v2 to 2.13.2 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 |
|---|---|---|---|
| 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
- 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
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by CISA (ADP).
Official description
An issue was discovered on certain Nuki Home Solutions devices. By sending a malformed HTTP verb, it is possible to force a reboot of the device. This affects Nuki Bridge v1 before 1.22.0 and v2 before 2.13.2.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource.
How developers prevent this class of flaw
- Ensure that protocols have specific limits of scale placed on them.
- Ensure that all failures in resource allocation place the system into a safe posture.
More Uncontrolled Resource Consumption vulnerabilities (CWE-400)
Timeline
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in bridge_v1
- 8.8 High severity
- 9.8 Critical severity
Recent Uncontrolled Resource Consumption vulnerabilities
- 7.1 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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