CVE-2020-27488
Last modified
CVE-2020-27488 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Loxone Miniserver devices with firmware before 11.1 (aka 11.1.9.3) are unable to use an authentication method that is based on the "signature of the update package." Therefore, these devices (or attackers who are spoofing these devices) can continue to use an unauthenticated cloud service for an indeterminate time period (possibly forever). Once an individual device's firmware is updated, and authentication occurs once, the cloud service recategorizes the device so that authentication is subsequently always required, and spoofing cannot occur.. EPSS estimates a 1.96% chance of exploitation in the next 30 days.
Description
Loxone Miniserver devices with firmware before 11.1 (aka 11.1.9.3) are unable to use an authentication method that is based on the "signature of the update package." Therefore, these devices (or attackers who are spoofing these devices) can continue to use an unauthenticated cloud service for an indeterminate time period (possibly forever). Once an individual device's firmware is updated, and authentication occurs once, the cloud service recategorizes the device so that authentication is subsequently always required, and spoofing cannot occur.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Loxone | Miniserver Gen 1 Firmware | < 11.1.9.3 |
References
- https://iot-lab-fh-ooe.github.io/loxone_clouddns_schwachstelle/Exploit, Third Party Advisory
- https://iot-lab-fh-ooe.github.io/loxone_clouddns_vulnerability/Exploit, Third Party Advisory
- https://www.loxone.com/dede/sicherheit-cloud-dns/Product, Vendor Advisory
- https://www.loxone.com/enen/security-cloud-dns/Vendor Advisory
- https://iot-lab-fh-ooe.github.io/loxone_clouddns_schwachstelle/Exploit, Third Party Advisory
- https://iot-lab-fh-ooe.github.io/loxone_clouddns_vulnerability/Exploit, Third Party Advisory
- https://www.loxone.com/dede/sicherheit-cloud-dns/Product, Vendor Advisory
- https://www.loxone.com/enen/security-cloud-dns/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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