Summary
Multiple vulnerabilities in all REX 100 devices with firmware <= 2.3.2 that allow an attacker to gain full control over the device.
Impact
Full control over the device is possible in various ways. For details see CVE description.
Affected Product(s)
| Model no. | Product name | Affected versions |
|---|---|---|
| Firmware <2.3.3 | REX 100 |
Vulnerabilities
Expand / Collapse allA high privileged remote attacker can execute arbitrary system commands via POST requests in the send_sms action due to improper neutralization of special elements used in an OS command.
A high privileged remote attacker can execute arbitrary system commands via POST requests in the diagnostic action due to improper neutralization of special elements used in an OS command.
A high privileged remote attacker can execute arbitrary system commands via GET requests in the cloud server communication script due to improper neutralization of special elements used in an OS command.
A high privileged remote attacker can alter the configuration database via POST requests due to improper neutralization of special elements used in a SQL statement.
An unauthenticated remote attacker could exploit a buffer overflow vulnerability in the device causing a denial of service that affects only the network initializing wizard (Conftool) service.
A high privileged remote attacker can exhaust critical system resources by sending specifically crafted POST requests to the send-sms action in fast succession.
A high privileged remote attacker can exhaust critical system resources by sending specifically crafted POST requests to the send-mail action in fast succession.
A high privileged remote attacker can gain persistent XSS via POST requests due to improper neutralization of special elements used to create dynamic content.
Remediation
Update to latest version: 2.3.3
Acknowledgments
Helmholz GmbH & Co. KG thanks the following parties for their efforts:
- CERT@VDE for coordination (see https://certvde.com )
- Sebastian Dietz from CyberDanube for coordination (see https://cyberdanube.com/ )
- F. Bruckmoser, M. Eder, J. Heigl, M. Heudorn, G. Hofmarcher, M. Kadlec, M. Pristauz-Telsnigg, S. Resch, P. Schweinzer, M. Gschiel from St. Poelten UAS for reporting (see https://fhstp.ac.at )
Revision History
| Version | Date | Summary |
|---|---|---|
| 1 | 21.07.2025 12:00 | Initial revision. |