Unauthorized Access Granted: Attackers exploit LG WebOS TV flaw, bypass authentication, and gain complete control
Critical Vulnerability Discovered in LG's WebOS for Smart TVs
A significant security vulnerability has been uncovered in LG's WebOS for smart TVs, allowing unauthenticated attackers to gain full control over the device. This critical flaw was discovered by security researchers and was disclosed at the TyphoonPWN 2025 hacking competition.
The vulnerability stems from a lack of proper input validation on a parameter, making the service vulnerable to path traversal. This means an attacker can request and download any file from the TV's filesystem without needing to authenticate. By exploiting this flaw, an attacker can access sensitive system files, including the database file containing authentication keys.
Once authenticated to the service, the attacker can enable developer mode on the device. With developer mode enabled, the attacker can install any application, including malware. The malware can be used for spying on the user, stealing data, or using the TV as a bot in a network of compromised devices.
The service exposes an API endpoint that allows peer devices to download files from specific directories. An attacker can exploit this endpoint to execute arbitrary commands, effectively gaining root control over the television. This allows them to install malicious applications and perform various malicious activities.
The entire process can be automated with a simple script for rapid exploitation. LG has released a security advisory named SMR-SEP-2025 to address the vulnerability. Users are urged to ensure their devices are updated with the latest firmware to mitigate the threat.
Models like the LG WebOS 43UT8050 are affected by this vulnerability. It's important for all LG smart TV users to stay vigilant and keep their devices updated to protect against such threats.
This vulnerability was even used to secure first place at the TyphoonPWN 2025 hacking competition. It underscores the importance of regular security checks and updates for smart devices in our increasingly connected world.
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