Missing authorization in Eclipse Hono
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-862.
Summary
The Eclipse Hono AMQP and MQTT protocol adapters do not check whether an authenticated gateway device is authorized to receive command & control messages when it has subscribed only to commands for a specific device. The missing check involves verifying that the command target device is configured giving permission for the gateway device to act on its behalf. This means an authenticated device of a certain tenant, notably also a non-gateway device acting like a gateway, may receive command & control messages targeted at a different device of the same tenant without corresponding permissions getting checked.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse Hono | 1.4.0 to 1.4.4 inclusive, 1.5.0 | — | No fix listed | CNA |
- Eclipse Hono VendorEclipse Foundation Affected 1.4.0 to 1.4.4 inclusive, 1.5.0 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:hono:*:*:*:*:*:*:*:* | 1.4.0 – 1.4.4 | Vulnerable | Eclipse Foundation |
| cpe:2.3:a:eclipse:hono:1.5.0:*:*:*:*:*:*:* | 1.5.0 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:hono:*:*:*:*:*:*:*:* Versions 1.4.0 – 1.4.4 Vulnerable ·Eclipse Foundation
- cpe:2.3:a:eclipse:hono:1.5.0:*:*:*:*:*:*:* Versions 1.5.0 Vulnerable ·Eclipse Foundation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27220
- 2026-10-03 Alias added: GHSA-2jmj-6ff4-3p3w
References
More Eclipse Foundation Hono vulnerabilities
- TI-2020-16543 In Eclipse Hono version 1.3.0 and 1.4.0 the AMQP protocol adapter does not verify the… CVSS 3.1HIGH 7.5
Sources
- CVE-2020-27220 · CVE Program
- CVE-2020-27220 · NVD
- FIRST EPSS
- GHSA-2jmj-6ff4-3p3w · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences