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CVE-2021-21563 : Security Advisory and Response

Discover the impact of CVE-2021-21563, an Improper Check vulnerability in Dell EMC PowerScale OneFS. Learn about affected versions, mitigation steps, and security practices.

Dell EMC PowerScale OneFS versions 8.1.2-9.1.0.x has been identified with an Improper Check for Unusual or Exceptional Conditions vulnerability, allowing an authenticated user with low privileges to trigger a denial of service event.

Understanding CVE-2021-21563

This section provides an overview of the CVE-2021-21563 vulnerability in Dell EMC PowerScale OneFS.

What is CVE-2021-21563?

The CVE-2021-21563 vulnerability exists in Dell EMC PowerScale OneFS versions 8.1.2-9.1.0.x due to an Improper Check for Unusual or Exceptional Conditions in its auditing component. This flaw enables a low-privileged authenticated user to initiate a denial of service event.

The Impact of CVE-2021-21563

The vulnerability has a base CVSS score of 6.5, categorizing it as of medium severity with a high impact on availability. Although it does not affect confidentiality or integrity, it can lead to service disruption and potential downtime.

Technical Details of CVE-2021-21563

This section delves into the technical aspects of the CVE-2021-21563 vulnerability.

Vulnerability Description

The vulnerability stems from an Improper Check for Unusual or Exceptional Conditions in the auditing component of Dell EMC PowerScale OneFS versions 8.1.2-9.1.0.x, which could be exploited by an authenticated user with low privileges.

Affected Systems and Versions

Dell EMC PowerScale OneFS versions 8.1.2-9.1.0.x are impacted by this vulnerability. Users of these versions are advised to take preventive measures.

Exploitation Mechanism

An authenticated user with low privileges can exploit the vulnerability by triggering a denial of service event, affecting the availability of the system.

Mitigation and Prevention

To address CVE-2021-21563, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Users should apply patches or updates provided by Dell promptly to mitigate the risk of exploitation. Additionally, implementing security best practices is vital.

Long-Term Security Practices

Consistent monitoring, access control enforcement, and security awareness training can enhance the overall security posture of the system and prevent similar vulnerabilities.

Patching and Updates

Regularly check for updates and security bulletins from Dell to stay informed about any security patches or fixes regarding the CVE-2021-21563 vulnerability.

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