CVE-2021-31610 : What You Need to Know

Bluetooth Classic implementation on AB32VG1 devices is vulnerable to a denial-of-service attack due to improper handling of LMP responses. Attackers in radio range can exploit this flaw to cause device restart or deadlock by flooding it with malicious data.

Understanding CVE-2021-31610

This CVE identifies a vulnerability in AB32VG1 devices' Bluetooth Classic implementation that can be exploited by attackers within radio range to launch denial-of-service attacks by overwhelming the device with certain data packets.

What is CVE-2021-31610?

The vulnerability in the Bluetooth Classic implementation on AB32VG1 devices allows nearby attackers to disrupt device operation by flooding it with malicious data, leading to denial of service through device restarts or deadlocks.

The Impact of CVE-2021-31610

The impact of this vulnerability is significant as it opens up the potential for attackers to disrupt device functionality, leading to service denial, device restarts, or even device lock-ups.

Technical Details of CVE-2021-31610

This section delves into the technical aspects of CVE-2021-31610, providing details on the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability lies in the Bluetooth Classic implementation on AB32VG1 devices, where continuous unsolicited LMP responses are not handled properly. Attackers can trigger denial-of-service attacks by flooding the device with specific data, causing restarts or deadlocks.

Affected Systems and Versions

AB32VG1 devices are specifically affected by this vulnerability. The Bluetooth Classic implementation on these devices is exploitable by attackers within radio range.

Exploitation Mechanism

Attackers exploit this vulnerability by sending continuous unsolicited LMP responses to flood the device with malicious LMP_AU_rand data, resulting in denial of service.

Mitigation and Prevention

Protecting against CVE-2021-31610 involves taking immediate steps to mitigate the risks and implementing long-term security practices.

Immediate Steps to Take

To mitigate the risks associated with CVE-2021-31610, users should disable Bluetooth on AB32VG1 devices in environments where untrusted parties may be present.

Long-Term Security Practices

Implementing secure coding practices, regularly updating device firmware, and staying informed about security advisories are crucial long-term measures to safeguard against potential vulnerabilities.

Patching and Updates

Vendors should release patches addressing the Bluetooth Classic vulnerability on AB32VG1 devices promptly. Users are advised to apply these updates as soon as they become available.