CVE-2021-22005 is a critical arbitrary file upload vulnerability in VMware vCenter Server's Analytics service. This vulnerability allows attackers with network access to port 443 on the vCenter Server to execute arbitrary code by uploading specially crafted files. With a CVSS score of 9.8, this vulnerability poses a severe risk to organizations relying on VMware products.
The risk to organizations includes unauthorized code execution, which can lead to data breaches, service interruptions, and significant operational disruptions. Given the nature of this vulnerability and its critical severity, organizations should prioritize patching immediately.
As of now, this vulnerability is known to be actively exploited, with a high probability of being used in targeted attacks. Organizations using affected versions of vCenter Server must take urgent action to remediate this vulnerability.
The urgency for defenders is underscored by the critical nature of this vulnerability, and organizations are advised to address it as part of their priority patch cycle.
Vulnerability Details
Officially, CVE-2021-22005 describes an arbitrary file upload vulnerability within the vCenter Server's Analytics service. The vulnerability has a CVSS score of 9.8, classified as critical. It affects VMware vCenter Server versions 6.5, 6.7, and 7.0, as well as VMware Cloud Foundation versions from 3.0 to 5.0. The published date for this vulnerability was September 23, 2021.
The Common Weakness Enumeration (CWE) classification for this vulnerability is CWE-22, indicating improper restriction of a file path.
Technical Analysis
The root cause of CVE-2021-22005 lies in the improper handling of file uploads in the vCenter Server's Analytics service. Attackers can exploit this vulnerability remotely, requiring no privileges or user interaction to execute malicious code.
The attack complexity is low, making it easier for attackers to exploit this vulnerability. The impacts on confidentiality, integrity, and availability are all rated as high, meaning that successful exploitation can result in severe consequences.
Risk & Impact Analysis
Real-world deployment of this vulnerability poses significant risk to organizations utilizing VMware vCenter Server. Given that attackers can execute arbitrary code, the potential blast radius is extensive. Organizations must be aware that the exploitation could lead to unauthorized access to sensitive data, disruption of services, and potential compliance violations.
Considering the CVSS score and the fact that this vulnerability is included in the Known Exploited Vulnerabilities (KEV) catalog, organizations are urged to take immediate action to mitigate this risk.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | Yes |
Affected Versions
The affected versions of VMware products include VMware vCenter Server versions 6.5, 6.7, and 7.0, as well as VMware Cloud Foundation versions from 3.0 to 5.0.
Mitigation & Remediation
Organizations should apply the latest patches provided by VMware to remediate this vulnerability. Detailed instructions can be found in the vendor advisory. If immediate patching is not feasible, implement additional network controls to restrict access to the vCenter Server and monitor for unusual activity.
For further information on security testing, organizations can utilize penetration testing to validate the effectiveness of their defenses.
Detection Guidance
Monitoring logs for anomalous file uploads and network traffic to and from the vCenter Server can help in early detection of potential exploitation attempts. Organizations should also look for behavioral anomalies that may indicate a breach.
AppSecure Threat Intelligence Insight
This vulnerability highlights the critical importance of secure file upload mechanisms in web applications. Organizations must ensure robust validation and sanitization of uploaded files to prevent similar vulnerabilities. The trend of increasing file upload vulnerabilities signifies a need for enhanced security practices.
For additional insights on vulnerability management, organizations can refer to our blog on vulnerability management programs and how to improve their security posture.
Additionally, organizations should consider implementing continuous security testing practices, as discussed in our guide on continuous security testing to ensure ongoing protection against emerging threats.
Finally, it is crucial for organizations to understand the impact of ransomware campaigns, as this vulnerability has known links to such activities. For insights into this area, our blog on ransomware statistics provides valuable information.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)