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CVE-2021-21546 Explained : Impact and Mitigation

Discover the details of CVE-2021-21546, a high-severity Information Disclosure vulnerability in Dell EMC NetWorker versions 18.x, 19.x prior to 19.3.0.4 and 19.4.0.0. Learn the impact, affected systems, and mitigation steps.

Dell EMC NetWorker versions 18.x, 19.x prior to 19.3.0.4 and 19.4.0.0 have been found to contain an Information Disclosure in Log Files vulnerability. This could allow a local low-privileged user of the Networker server to potentially access plain-text credentials from server log files.

Understanding CVE-2021-21546

This section will delve deeper into the nature of the vulnerability and its implications.

What is CVE-2021-21546?

CVE-2021-21546 is an Information Disclosure vulnerability present in Dell EMC NetWorker versions 18.x, 19.x prior to 19.3.0.4 and 19.4.0.0. It allows a local low-privileged user to read plain-text credentials from server log files.

The Impact of CVE-2021-21546

The impact of this vulnerability is rated as high with a CVSS base score of 7.8. An attacker with low privileges could potentially exploit this issue to compromise the confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2021-21546

Let's explore the technical aspects of the CVE in this section.

Vulnerability Description

The vulnerability allows a low-privileged local user to gain access to sensitive plain-text credentials stored in server log files, compromising the security of the system.

Affected Systems and Versions

The vulnerability affects Dell EMC NetWorker versions 18.x, 19.x prior to 19.3.0.4 and 19.4.0.0.

Exploitation Mechanism

The vulnerability can be exploited by a local low-privileged user to access and extract plain-text credentials from the log files of the Networker server.

Mitigation and Prevention

Learn how to protect your systems from this vulnerability in the following section.

Immediate Steps to Take

Users are advised to update their Dell EMC NetWorker software to version 19.3.0.4 or higher to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing the principle of least privilege, monitoring log file access, and conducting regular security audits can help prevent such vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Dell for NetWorker to ensure the ongoing security of your systems.

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