CVE-2021-21992 : Vulnerability Insights and Analysis
Discover the impact of CVE-2021-21992, a denial-of-service vulnerability in VMware vCenter Server and Cloud Foundation due to improper XML parsing. Learn about affected versions and the necessary mitigation steps.
A denial-of-service vulnerability has been identified in VMware vCenter Server and VMware Cloud Foundation. This CVE allows a malicious actor to create a denial-of-service condition on the vCenter Server host by exploiting improper XML entity parsing.
Understanding CVE-2021-21992
This section delves into the details of CVE-2021-21992.
What is CVE-2021-21992?
The vulnerability in VMware vCenter Server and VMware Cloud Foundation enables a non-administrative user to trigger a denial-of-service attack by leveraging improper XML entity parsing.
The Impact of CVE-2021-21992
The exploitation of this vulnerability may result in a denial-of-service condition on the vCenter Server host, affecting system availability and performance.
Technical Details of CVE-2021-21992
This section provides technical insights into CVE-2021-21992.
Vulnerability Description
The vulnerability arises from improper XML entity parsing in VMware vCenter Server and VMware Cloud Foundation, allowing unauthorized users to disrupt server operations.
Affected Systems and Versions
VMware vCenter Server versions 7.x before 7.0 U2c, 6.7 before 6.7 U3o, and 6.5 before 6.5 U3q, along with VMware Cloud Foundation versions 4.x before 4.3 and 3.x before 3.10.2.2 are impacted by this vulnerability.
Exploitation Mechanism
Malicious actors with non-administrative user access to the vCenter Server vSphere Client or vSphere Web Client can exploit this vulnerability to launch a denial-of-service attack.
Mitigation and Prevention
In this section, learn how to mitigate the risks associated with CVE-2021-21992.
Immediate Steps to Take
Ensure access controls are in place to restrict unauthorized access to vulnerable systems and apply necessary security patches promptly.
Long-Term Security Practices
Implement regular security updates, conduct security training for personnel, and monitor system logs for any suspicious activities to enhance overall cybersecurity.
Patching and Updates
Stay informed about security advisories provided by VMware, and install the latest patches and updates to protect your systems from potential threats.