CVE-2021-21505 : What You Need to Know

A vulnerability has been discovered in Dell EMC Integrated System for Microsoft Azure Stack Hub that could allow a remote unauthenticated attacker to gain root privileges by exploiting an undocumented default iDRAC account.

Understanding CVE-2021-21505

This CVE refers to a security issue in Dell EMC Integrated System for Microsoft Azure Stack Hub related to an undocumented default iDRAC account.

What is CVE-2021-21505?

The affected versions of Dell EMC Integrated System for Microsoft Azure Stack Hub, ranging from 1906 to 2011, contain a default iDRAC account that is not documented. An attacker with remote access and knowledge of the default credentials could potentially exploit this to gain unauthorized access and achieve root privileges.

The Impact of CVE-2021-21505

This vulnerability has a CVSS base score of 8.0, indicating a high severity level. The attack can be carried out with low privileges required and has a high impact on confidentiality, integrity, and availability of the system.

Technical Details of CVE-2021-21505

The following technical details will help in understanding this vulnerability better:

Vulnerability Description

The vulnerability lies in the presence of an undocumented default iDRAC account in the affected versions of Dell EMC Integrated System for Microsoft Azure Stack Hub.

Affected Systems and Versions

The versions impacted include 1906 to 2011 of Dell EMC Integrated System for Microsoft Azure Stack Hub.

Exploitation Mechanism

A remote, unauthenticated attacker can exploit this vulnerability by using the default credentials to gain unauthorized access and escalate privileges.

Mitigation and Prevention

To address and prevent the exploitation of CVE-2021-21505, the following steps are recommended:

Immediate Steps to Take

It is crucial to change the default credentials and disable any default accounts immediately. Organizations should restrict network access to the affected systems.

Long-Term Security Practices

Regular security audits and monitoring of accounts and system access are essential. Ensure that strong, unique passwords are set for all accounts to mitigate similar vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Dell for the affected system. Apply updates promptly to protect the system from known vulnerabilities.