CVE-2021-21538 : Security Advisory and Response

Dell EMC iDRAC9 versions 4.40.00.00 and later, but prior to 4.40.10.00, contain an improper authentication vulnerability that could be exploited by a remote unauthenticated attacker to gain access to the virtual console.

Understanding CVE-2021-21538

This section provides insights into the impact and technical details of CVE-2021-21538.

What is CVE-2021-21538?

CVE-2021-21538 is a vulnerability in Dell's Integrated Dell Remote Access Controller (iDRAC) versions 4.40.00.00 and earlier, allowing unauthorized access to the virtual console.

The Impact of CVE-2021-21538

The vulnerability has a CVSS v3.1 base score of 9.6, categorizing it as critical. A remote attacker could exploit this flaw to compromise confidentiality, integrity, and potentially gain control over affected systems.

Technical Details of CVE-2021-21538

Let's delve into the specifics of the vulnerability.

Vulnerability Description

The improper authentication vulnerability in iDRAC9 versions 4.40.00.00 and earlier exposes systems to unauthorized access through the virtual console.

Affected Systems and Versions

Integrated Dell Remote Access Controller (iDRAC) versions prior to 4.40.10.00 are affected by this vulnerability.

Exploitation Mechanism

Remote, unauthenticated attackers can exploit this vulnerability to gain access to the virtual console.

Mitigation and Prevention

To secure your systems from CVE-2021-21538, consider the following proactive measures.

Immediate Steps to Take

Update affected iDRAC installations to version 4.40.10.00 or later. Additionally, restrict network access to iDRAC interfaces and apply strong access controls.

Long-Term Security Practices

Regularly monitor for security advisories and updates from Dell. Implement network segmentation and access controls to limit exposure to potential attackers.

Patching and Updates

Deploy patches as soon as they are released by Dell to address known vulnerabilities and enhance system security.