ICS-Advisories

Risk Evaluation

Schneider Electric is aware of a RADIUS protocol vulnerability affecting its Modicon Network Managed Switch product. The Modicon Network Managed Switch product provides connectivity for multiple Ethernet devices, network management, enhanced cyber security and more advanced switching features. Failure to apply the mitigation provided below may risk forgery attacks in RADIUS Protocol, which could result in modification of any valid Response (Access-Accept, Access-Reject, or Access-Challenge) to any other response which could result in the possibility of denial of service and loss of confidentiality, integrity of the devices connected to the switch.

Zusammenfassung der Gegenmaßnahmen

The default RADIUS configuration is not vulnerable. However, if the RADIUS Server Message Authenticator option is disabled, the product becomes vulnerable.We advise keeping this parameter in its default (enabled) state.This parameter can be configured via CLI and SNMP:TCSESM* CLI: radius server msgauthMIB: hmAgentRadiusServerMsgAuth