CVE-2021-21599 : Exploit Details and Defense Strategies

Dell EMC PowerScale OneFS versions 8.2.x - 9.2.1.x have been found to contain an OS command injection vulnerability. This could potentially lead to privilege escalation for users with specific privileges, posing a risk to compliance guarantees.

Understanding CVE-2021-21599

This CVE identifies a critical vulnerability in Dell EMC PowerScale OneFS versions 8.2.x - 9.2.1.x that allows for privilege escalation through OS command injection.

What is CVE-2021-21599?

CVE-2021-21599 is an OS command injection vulnerability found in Dell EMC PowerScale OneFS versions 8.2.x - 9.2.1.x. It impacts clusters operating in Smartlock WORM compliance mode, enabling users with certain privileges to elevate their access.

The Impact of CVE-2021-21599

The vulnerability poses a medium severity risk with a CVSS base score of 6. It affects the integrity of the system by allowing high privileged users to execute arbitrary commands, potentially compromising compliance guarantees within affected clusters.

Technical Details of CVE-2021-21599

This section delves into the specifics of the vulnerability for a deeper understanding of its implications.

Vulnerability Description

The OS command injection vulnerability in Dell EMC PowerScale OneFS 8.2.x - 9.2.1.x enables users with ISI_PRIV_LOGIN_SSH or ISI_PRIV_LOGIN_CONSOLE to perform unauthorized actions, leading to privilege escalation.

Affected Systems and Versions

The impacted systems include Dell EMC PowerScale OneFS versions 8.2.x - 9.2.1.x. Smartlock WORM compliance mode clusters are particularly vulnerable to exploitation.

Exploitation Mechanism

Users with specific privileges can leverage the vulnerability to execute unauthorized commands, potentially compromising system integrity.

Mitigation and Prevention

To safeguard systems from CVE-2021-21599, prompt action is essential to mitigate risks and enhance security measures.

Immediate Steps to Take

Affected users are advised to update or upgrade their Dell EMC PowerScale OneFS to a secure version provided by Dell. It is crucial to restrict access privileges and monitor system activities closely.

Long-Term Security Practices

Implementing least privilege access, regular security audits, and employee training on cybersecurity best practices can help prevent similar vulnerabilities in the future.

Patching and Updates

Dell recommends all users of PowerScale OneFS 8.2.x - 9.2.1.x to apply the latest updates and patches to address the OS command injection vulnerability and strengthen system security.