KNX devices that use KNX Connection Authorization and support Option 1 are, depending on the implementation, vulnerable to being locked and users being unable to reset them to gain access to the device. The BCU key feature on the devices can be used to create a password for the device, but this password can often not be reset without entering the current password. If the device is configured to interface with a network, an attacker with access to that network could interface with the KNX installation, purge all devices without additional security options enabled, and set a BCU key, locking the device. Even if a device is not connected to a network, an attacker with physical access to the device could also exploit this vulnerability in the same way.
References
| Link | Resource |
|---|---|
| https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01 | Third Party Advisory US Government Resource |
| https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01 | Third Party Advisory US Government Resource |
Configurations
History
21 Nov 2024, 08:34
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01 - Third Party Advisory, US Government Resource |
11 Sep 2023, 17:47
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.5 |
| CPE | cpe:2.3:a:knx:connection_authorization:-:*:*:*:*:*:*:* | |
| References | (MISC) https://www.cisa.gov/news-events/ics-advisories/icsa-23-236-01 - Third Party Advisory, US Government Resource | |
| First Time |
Knx
Knx connection Authorization |
29 Aug 2023, 20:41
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2023-08-29 20:15
Updated : 2024-11-21 08:34
NVD link : CVE-2023-4346
Mitre link : CVE-2023-4346
CVE.ORG link : CVE-2023-4346
JSON object : View
Products Affected
knx
- connection_authorization
CWE
CWE-645
Overly Restrictive Account Lockout Mechanism