CVE-2021-21542 : Vulnerability Insights and Analysis
Learn about CVE-2021-21542 impacting Dell iDRAC9 versions prior to 4.40.10.00. Find out the technical details, impact, affected systems, and mitigation strategies against these cross-site scripting vulnerabilities.
Dell EMC iDRAC9 versions prior to 4.40.10.00 have multiple stored cross-site scripting vulnerabilities that can be exploited by a remote authenticated malicious user with high privileges. This could lead to the execution of malicious code in the context of the vulnerable application.
Understanding CVE-2021-21542
This CVE impacts Integrated Dell Remote Access Controller (iDRAC) devices by Dell.
What is CVE-2021-21542?
CVE-2021-21542 involves multiple stored cross-site scripting vulnerabilities in Dell EMC iDRAC9 versions before 4.40.10.00. Attackers with high privileges could inject malicious code through affected certificate generation, which gets executed when victims access the manipulated data in their browsers.
The Impact of CVE-2021-21542
The impact of this CVE is rated as Medium with a CVSS base score of 4.8. These vulnerabilities require network access and user interaction, but can be exploited without compromising system availability.
Technical Details of CVE-2021-21542
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
The stored cross-site scripting vulnerabilities in Dell iDRAC allow attackers to inject malicious scripts through specific certificate generation processes.
Affected Systems and Versions
Integrated Dell Remote Access Controller (iDRAC) devices running versions earlier than 4.40.10.00 are impacted by CVE-2021-21542.
Exploitation Mechanism
A remote authenticated attacker with high privileges can exploit these vulnerabilities by injecting malicious HTML or JavaScript code during certificate generation.
Mitigation and Prevention
Protecting systems from CVE-2021-21542 involves immediate actions and long-term security practices.
Immediate Steps to Take
Users should update their Dell EMC iDRAC9 devices to version 4.40.10.00 or later to mitigate the risk of exploitation. Implement network security measures to restrict unauthorized access.
Long-Term Security Practices
Ensure regular security updates and patches are applied to all network-connected devices. Educate users about potential phishing attacks and the importance of verifying website security.
Patching and Updates
Stay informed about security advisories from Dell and promptly apply patches to address identified vulnerabilities.