Red Lion Controls Sixnet RTU Authentication Bypass Using An Alternative Path Or Channel
Red Lion Controls Sixnet RTU Authentication Bypass Using An Alternative Path Or Channel
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
Red Lion recommends users apply the latest patches https://support.redlion.net/hc/en-us/articles/19338927539981-SixTRAK-and-VersaTRAK-Security-Patch-RLCSIM-2023-05 to their products. Red Lion recommends users apply additional mitigations to help reduce the risk: * Enable user authentication, see Red Lion instructions https://support.redlion.net/hc/en-us/articles/18190385510797-ACCESS-RTU-and-IO-How-to-install-a-patch-or-package-to-the-RTU . Blocking all or most Sixnet UDR messages over TCP/IP will eliminate authentication bypass. Sixnet UDR messages over TCP/IP will be ignored. To block all Sixnet UDR messages over TCP/IP install Patch1_tcp_udr_all_blocked.tar.gz. * ST-IPm-8460 – Install 8313_patch1_tcp_udr_all_blocked.tar.gz * ST-IPm-6350/VT-mIPm-245-D/VT-mIPm-135-D/VT-IPm2m-213-D/VT-IPm2m-113-D – Install 855_patch1_tcp_udr_all_blocked.tar.gz To block all Sixnet UDR messages except I/O commands over TCP/IP and UDP/IP install Patch2_io_open.tar.gz. * ST-IPm-8460 – Install 8313_patch2_io_open.tar.gz * ST-IPm-6350/VT-mIPm-245-D/VT-mIPm-135-D/VT-IPm2m-213-D/VT-IPm2m-113-D – Install 855_patch2_io_open.tar.gz To Block all Sixnet UDR messages over TCP/IP: * Enable iptables rules to block TCP/IP traffic. * In the Sixnet I/O Tool Kit go to Configuration>Configuration Station/Module>"Ports" tab>Security. * Select the "Load the this file with each station load" radio button to load a custom rc.firewall configuration file. The rules below will allow all other traffic except