Vulnerability Details : CVE-2020-27220
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.
Exploit prediction scoring system (EPSS) score for CVE-2020-27220
Probability of exploitation activity in the next 30 days: 0.08%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 34 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-27220
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
9.0
|
HIGH | AV:N/AC:L/Au:S/C:C/I:C/A:C |
8.0
|
10.0
|
NIST |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2020-27220
-
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.Assigned by:
- emo@eclipse.org (Secondary)
- nvd@nist.gov (Primary)
References for CVE-2020-27220
-
https://bugs.eclipse.org/bugs/show_bug.cgi?id=569856
569856 – (CVE-2020-27220) Hono's AMQP/MQTT adapter doesn't check if device may subscribe for commands targeted at another deviceVendor Advisory
Products affected by CVE-2020-27220
- cpe:2.3:a:eclipse:hono:*:*:*:*:*:*:*:*
- cpe:2.3:a:eclipse:hono:1.5.0:*:*:*:*:*:*:*