CVE-2021-21534 : Exploit Details and Defense Strategies

This article provides detailed information about CVE-2021-21534, a vulnerability found in Dell Hybrid Client (DHC) versions prior to 1.5, allowing local unauthenticated attackers to gain access to sensitive information via the local API.

Understanding CVE-2021-21534

CVE-2021-21534 is an information exposure vulnerability affecting Dell Hybrid Client (DHC) versions less than 1.5. It was made public on March 31, 2021.

What is CVE-2021-21534?

Dell Hybrid Client versions before 1.5 contain an information exposure flaw. This vulnerability could be exploited by a local unauthenticated attacker to access sensitive information through the local API.

The Impact of CVE-2021-21534

With a base score of 4 out of 10 and a medium severity level, this vulnerability poses a risk of unauthorized access to confidential data stored on affected systems.

Technical Details of CVE-2021-21534

Here are specific technical details regarding CVE-2021-21534:

Vulnerability Description

The vulnerability allows local unauthenticated attackers to exploit Dell Hybrid Client versions prior to 1.5 to gain unauthorized access to sensitive information through the local API.

Affected Systems and Versions

Dell Hybrid Client (DHC) versions less than 1.5 are affected by this vulnerability.

Exploitation Mechanism

A local unauthenticated attacker can exploit this vulnerability to access confidential information stored on the local API of affected systems.

Mitigation and Prevention

To secure systems from CVE-2021-21534, follow these security practices:

Immediate Steps to Take

Upgrade Dell Hybrid Client to version 1.5 or higher.
Restrict network access to the local API to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor for security updates and patches from Dell.
Implement network segmentation and access controls to limit exposure to local APIs.

Patching and Updates

Apply security updates provided by Dell to ensure protection against known vulnerabilities.