CVE-2020-23539 : Exploit Details and Defense Strategies

An issue was discovered in Realtek rtl8723de BLE Stack <= 4.1 that allows remote attackers to cause a Denial of Service via the interval field to the CONNECT_REQ message.

Understanding CVE-2020-23539

This CVE involves a vulnerability in the Realtek rtl8723de BLE Stack that can be exploited by remote attackers to trigger a Denial of Service attack.

What is CVE-2020-23539?

The CVE-2020-23539 vulnerability pertains to a flaw in the Realtek rtl8723de BLE Stack version 4.1 and below, enabling attackers to disrupt services by manipulating the interval field in the CONNECT_REQ message.

The Impact of CVE-2020-23539

This vulnerability can lead to a Denial of Service condition, potentially causing system unavailability and disruption of services for legitimate users.

Technical Details of CVE-2020-23539

The technical aspects of the CVE-2020-23539 vulnerability are as follows:

Vulnerability Description

The issue in Realtek rtl8723de BLE Stack <= 4.1 allows attackers to exploit the interval field in the CONNECT_REQ message, leading to a Denial of Service.

Affected Systems and Versions

Product: Realtek rtl8723de BLE Stack
Vendor: Realtek
Versions affected: <= 4.1

Exploitation Mechanism

Attackers can exploit this vulnerability remotely by manipulating the interval field in the CONNECT_REQ message, causing a Denial of Service.

Mitigation and Prevention

To address CVE-2020-23539, consider the following mitigation strategies:

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate users and administrators about security best practices.
Implement strong access controls and authentication mechanisms.

Patching and Updates

Ensure that Realtek rtl8723de BLE Stack is updated to a version above 4.1 to mitigate the vulnerability.