CVE-2018-20823 : Security Advisory and Response

Xiaomi Mi 5s devices are vulnerable to a gyroscope-related issue that can be exploited by attackers to launch a denial of service attack using a specific audio signal.

Understanding CVE-2018-20823

This CVE identifies a vulnerability in Xiaomi Mi 5s devices related to their gyroscope feature, allowing attackers to disrupt the device's functionality.

What is CVE-2018-20823?

The vulnerability in Xiaomi Mi 5s devices enables attackers to trigger a denial of service attack by emitting a 20.4 kHz audio signal, causing resonance and generating false data, known as a MEMS ultrasound attack.

The Impact of CVE-2018-20823

Attackers can exploit this vulnerability to disrupt the normal operation of Xiaomi Mi 5s devices, potentially leading to service unavailability and data falsification.

Technical Details of CVE-2018-20823

This section delves into the technical aspects of the CVE.

Vulnerability Description

The vulnerability allows attackers to manipulate the gyroscope of Xiaomi Mi 5s devices using a specific audio signal, resulting in a denial of service attack.

Affected Systems and Versions

Affected: Xiaomi Mi 5s devices
Versions: Not applicable

Exploitation Mechanism

Attackers exploit the gyroscope feature by emitting a 20.4 kHz audio signal, inducing resonance and generating false data, causing a denial of service.

Mitigation and Prevention

Protecting against and mitigating the impact of CVE-2018-20823.

Immediate Steps to Take

Disable unnecessary sensors on the device to limit potential attack vectors.
Regularly update the device's firmware to patch known vulnerabilities.

Long-Term Security Practices

Implement sound security practices, such as using reputable apps and avoiding suspicious downloads.
Stay informed about security threats and regularly check for device updates.

Patching and Updates

Apply firmware updates provided by Xiaomi to address the vulnerability and enhance device security.