CVE-2019-12821 Explained : Impact and Mitigation

A vulnerability in version 2.0 of the Shenzhen Jisiwei i3 robot vacuum cleaner application allows unauthorized access to devices when linking them to an account using a predictable QR code sequence based on the device ID.

Understanding CVE-2019-12821

What is CVE-2019-12821?

The vulnerability in the Shenzhen Jisiwei i3 robot vacuum cleaner app version 2.0 enables attackers to connect any device and gain complete control by exploiting the predictable QR code sequence.

The Impact of CVE-2019-12821

The exploit allows unauthorized individuals to link arbitrary devices to user accounts and take full control over them, posing a significant security risk to users.

Technical Details of CVE-2019-12821

Vulnerability Description

The vulnerability arises from the use of a QR code that follows a predictable pattern solely based on the unique device ID, enabling attackers to connect any device to an account.

Affected Systems and Versions

Product: Shenzhen Jisiwei i3 robot vacuum cleaner application
Version: 2.0

Exploitation Mechanism

Attackers can generate a QR code containing the device ID details, starting with the prefix "JSW" followed by a specific six-digit number, to gain unauthorized access and control over the device.

Mitigation and Prevention

Immediate Steps to Take

Avoid linking devices using QR codes with predictable patterns
Regularly check for unauthorized device connections

Long-Term Security Practices

Implement strong, unique device IDs for each device
Use secure authentication methods for device linking

Patching and Updates

Ensure the application is updated to a secure version that addresses the vulnerability.