Teltonika’s Remote Management System versions prior to 4.10.0 contain a function that allows users to claim their devices. This function returns information based on whether the serial number of a device has already been claimed, the MAC address of a device has already been claimed, or whether the attempt to claim a device was successful. An attacker could exploit this to create a list of the serial numbers and MAC addresses of all devices cloud-connected to the Remote Management System.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-32346
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-131-08