Summary
The data24 service that is bundled with every installation of myREX24 V2/myREX24.virtual has two
serious flaws in core components. These combined can lead to a complete loss of confidentiality, integrity
and availability.
Details
Impact
CVE-2024-23943: A total loss of confidentiality and integrity, for individual devices or the whole service, is
possible.
CVE-2024-23942: An attacker in possession of the device's configuration file can impersonate the real
device. This also allows to prevent the real device from connecting successful.
Mitigation
CVE-2024-23942: If the device's serial number is known to myREX24 V2/myREX24.virtual before the
downloadable configuration is created, that configuration will be encrypted allowing only the correct device to
decrypt it.
Remediation
Update to latest version: 2.16.2
CVE-2024-23943: This fix does not apply to REX 200/REX 250 devices with firmware 8.0.0 - 8.1.3. If you are using a device with this firmware, please update it to >= 8.2.0.
Vulnerabilities 2
-
Critical 9.1
MB connect line: Cloud API access due to a lack of authentication for a critical function
An unauthenticated remote attacker can gain access to the cloud API due to a lack of authentication for a critical function in the affected devices. Availability is not affected.
-
High 7.1
MB connect line: Configuration File on the client workstation is not encrypted
A local user may find a configuration file on the client workstation with unencrypted sensitive data. This allows an attacker to impersonate the device or prevent the device from accessing the cloud portal which leads to a DoS.
Revision history
-
#4
Fix: added distribution
-
#3
Update: fixed CSAF-Reference URL, changed url in credits, removed whitespace after version operator
-
#2
Update: Changed Product name
-
#1
Initial revision.
References
-
Helmholz GmbH & Co. KG Advisories
https://www.helmholz.de/en/service-support/service/security-psirt/
-
CERT@VDE Security Advisories for Helmholz GmbH & Co. KG
https://certvde.com/en/advisories/vendor/helmholz
-
VDE-2024-031: Helmholz: Vulnerabilities in myREX24 V2/myREX24.virtual - HTML
https://certvde.com/en/advisories/VDE-2024-031