CVE-2021-21540 : What You Need to Know
Discover details about CVE-2021-21540 impacting Dell EMC iDRAC9 versions before 4.40.00.00. Learn about the vulnerability, its impact, and mitigation steps.
Dell EMC iDRAC9 versions prior to 4.40.00.00 are affected by a stack-based overflow vulnerability that could allow a remote authenticated attacker to overwrite configuration information by injecting a large payload. This CVE was published on April 14, 2021, with a CVSS base score of 5.9.
Understanding CVE-2021-21540
This section aims to provide a detailed analysis of the CVE-2021-21540 vulnerability.
What is CVE-2021-21540?
CVE-2021-21540 is a stack-based overflow vulnerability found in Dell EMC iDRAC9 versions prior to 4.40.00.00, which can be exploited by a remote authenticated attacker to manipulate configuration data by injecting a large payload.
The Impact of CVE-2021-21540
With a CVSS base score of 5.9, this vulnerability poses a medium-severity risk. An attacker could potentially compromise the integrity of affected systems by leveraging this vulnerability.
Technical Details of CVE-2021-21540
Explore the technical specifics related to CVE-2021-21540 below.
Vulnerability Description
The vulnerability stems from a stack-based overflow in iDRAC9 versions prior to 4.40.00.00. Attackers with remote authentication could abuse this flaw to overwrite configuration information.
Affected Systems and Versions
The vulnerability impacts Dell's Integrated Dell Remote Access Controller (iDRAC) versions below 4.40.00.00 where the configuration data could be at risk of alteration.
Exploitation Mechanism
A remote authenticated attacker can exploit CVE-2021-21540 by injecting an excessively large payload to overwrite critical configuration data.
Mitigation and Prevention
Learn how to mitigate and prevent the risks associated with CVE-2021-21540.
Immediate Steps to Take
Admins should promptly update affected iDRAC versions to 4.40.00.00 or above to eliminate the vulnerability. Additionally, monitor system logs for any suspicious activities.
Long-Term Security Practices
Incorporate regular security audits and penetration testing into your cybersecurity practices to detect and mitigate vulnerabilities before they can be exploited.
Patching and Updates
Stay informed about security updates from Dell and apply patches promptly to safeguard your systems against known vulnerabilities.