An issue was discovered in Siklu Communications Etherhaul 8010TX and 1200FX devices, Firmware 7.4.0 through 10.7.3 and possibly other previous versions. The rfpiped service listening on TCP port 555 which uses static AES encryption keys hardcoded in the binary. These keys are identical across all devices, allowing attackers to craft encrypted packets that execute arbitrary commands without authentication. This is a failed patch for CVE-2017-7318. This issue may affect other Etherhaul series devices with shared firmware.
The rfpiped service listens on TCP port 555 and encrypts communications using static AES keys hardcoded directly in the firmware binary file. Because the keys are identical across all devices in this series, an attacker knowing these keys can construct properly encrypted packets containing arbitrary commands. The service processes such packets without any sender identity verification, leading to command execution with the privileges of the service. This vulnerability is a failed attempt to fix the earlier CVE-2017-7318 vulnerability.
An attacker can remotely and without authentication execute arbitrary system commands on the device, gaining full control over its configuration, network traffic, and service availability.
Apply patches available from the manufacturer according to the references provided. As a temporary measure until updates are applied, it is recommended to block access to TCP port 555 at the firewall level and isolate devices in a dedicated management network segment that is inaccessible from outside.
Siklu Communications Etherhaul 8010TX and 1200FX with firmware versions from 7.4.0 to 10.7.3 (earlier versions may also be affected); the vulnerability may also affect other Etherhaul series devices using shared firmware
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H