Experts have identified a significant security weakness in wireless charging technology, revealing that attackers can utilize electromagnetic interference to compromise devices. Although the convenience of wireless charging has gained immense popularity, a team of researchers from the University of Florida and CertiK has spotlighted the technology’s susceptibility to several threats.
Emerging Security Flaws in Wireless Charging
During their investigation, the researchers unearthed a method called VoltSchemer that enables adversaries to manipulate power supply voltages of wireless chargers without physical alterations to the device. Such an exploit can trigger various hazardous scenarios, including unauthorized control over voice-activated assistants, potential device damage, and circumvention of the Qi wireless charging standard’s protective measures.
Comprehensive Study on Wireless Charger Vulnerabilities
The research team tested the vulnerability on several top-selling chargers and observed how threat actors could exploit the flaw to gain control over devices. Although wireless charging technology, which relies on near-field magnetic coupling, is generally seen as a safe alternative to wired charging with reduced risk of data breaches, the study illustrates critical vulnerabilities.
The Qi standard, which is designed to ensure safe and efficient charging, has been instrumental in the widespread adoption of wireless charging. Chargers adhering to this standard are ubiquitous, found in public spaces such as airports and restaurants. Despite its benefits, including improved security and convenience, the study suggests that the technology is not impervious to sophisticated attacks.
The researchers examined multiple attack vectors, including the injection of false voice commands and tampering with Qi messages. They conducted experiments to assess system resilience, determining the minimum required interference for successful, undetected attacks. Tests on devices like the Samsung Galaxy S8 revealed that even with built-in safety measures, the devices were still vulnerable to overheating caused by manipulated chargers.
To mitigate such risks, the study proposes incorporating noise suppression features into charging devices. While this method demonstrated effectiveness in reducing electromagnetic noise, it could lead to increased production costs and other practical drawbacks.
Researchers have pinpointed essential protective strategies to counteract such wireless charging vulnerabilities, suggesting a more cautious approach to the widespread adoption of this technology.
