A Malicious SIM Card Can Run Attacker Code Inside the Modems Behind Cellular IoT Devices
Summary
Researchers have discovered that a malicious SIM card can command the cellular module it is inserted into to execute attacker-chosen code. This vulnerability has been demonstrated on 26 different phones and cellular modules, potentially allowing attackers to compromise devices like EV chargers and industrial routers.
IFF Assessment
The discovery of a vulnerability that allows malicious SIM cards to execute arbitrary code on cellular IoT devices poses a significant threat to connected systems.
Severity
This vulnerability allows for Remote Code Execution (RCE) on critical IoT devices, with a high potential for impact and exploitability due to the nature of SIM card functionality and the widespread use of affected devices.
Defender Context
This finding highlights a critical supply chain risk within IoT devices that rely on cellular connectivity. Defenders should be aware of this potential attack vector and consider implementing network segmentation and device hardening measures for cellular-connected endpoints. Monitoring for unusual network traffic originating from these devices could also be a valuable detection strategy.