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CVE-2021-21528 : Security Advisory and Response

Learn about CVE-2021-21528 impacting Dell EMC PowerScale OneFS versions 9.1.0, 9.2.0.x, 9.2.1.x. Explore the impact, technical details, and mitigation steps to secure affected systems.

This CVE-2021-21528 article provides detailed information about the Exposure of Information through Directory Listing vulnerability in Dell EMC PowerScale OneFS versions 9.1.0, 9.2.0.x, 9.2.1.x, including its impact, technical details, and mitigation steps.

Understanding CVE-2021-21528

CVE-2021-21528 is a vulnerability in Dell EMC PowerScale OneFS versions 9.1.0, 9.2.0.x, 9.2.1.x that exposes information through directory listing during the upgrade process.

What is CVE-2021-21528?

This vulnerability allows an attacker to access sensitive information due to improper directory listing, potentially leading to data exposure and confidentiality breaches.

The Impact of CVE-2021-21528

With a CVSS base score of 7.5 (High), the vulnerability poses a significant risk by allowing unauthorized access to confidential data, impacting the confidentiality of affected systems.

Technical Details of CVE-2021-21528

The technical details of CVE-2021-21528 include vulnerability description, affected systems and versions, and exploitation mechanism.

Vulnerability Description

CVE-2021-21528 is an Exposure of Information through Directory Listing vulnerability in Dell EMC PowerScale OneFS versions 9.1.0, 9.2.0.x, 9.2.1.x, triggered during the upgrade process from previous versions.

Affected Systems and Versions

Dell EMC PowerScale OneFS versions 9.1.0, 9.2.0.x, 9.2.1.x are affected by this vulnerability, potentially exposing sensitive data during directory listing operations.

Exploitation Mechanism

To exploit CVE-2021-21528, an attacker needs network access to the vulnerable system, leveraging the exposure of directory information to extract confidential data.

Mitigation and Prevention

Mitigation steps and security practices to prevent exploitation of CVE-2021-21528.

Immediate Steps to Take

Organizations should apply relevant security patches provided by Dell to address the vulnerability promptly, limiting exposure of sensitive information.

Long-Term Security Practices

Implementing access controls, regular security assessments, and monitoring directory listing activities can enhance long-term security posture.

Patching and Updates

Regularly monitor Dell EMC advisories and apply patches or updates for PowerScale OneFS to mitigate vulnerabilities and maintain a secure environment.

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