VMware ESXi, Workstation, and Fusion contain an integer-overflow vulnerability in the VMXNET3 virtual network adapter. This vulnerability allows a malicious actor with local administrative privileges on a virtual machine with the VMXNET3 virtual network adapter to execute code on the host system. It is crucial to note that non-VMXNET3 virtual adapters are not affected by this issue. With a CVSS score of 9.3, this vulnerability is classified as critical.
The implications of this vulnerability are significant, as attackers may leverage this flaw to gain unauthorized access to the host system, potentially leading to a full compromise. Organizations must understand the urgency of addressing this vulnerability, given its high severity and potential impact on their infrastructure.
Currently, there are no known exploits or public proof-of-concept code available. However, the critical nature of this vulnerability means that organizations should prioritize patching immediately to mitigate risks associated with exploitation.
Effective remediation is essential. Organizations utilizing affected VMware products must ensure they are prepared to implement necessary updates as soon as they are made available.
Vulnerability Details
The integer-overflow vulnerability in the VMXNET3 virtual network adapter could lead to execution of arbitrary code on the host system. This vulnerability falls under CWE-787. The CVSS score of 9.3 indicates a critical severity level, emphasizing the need for immediate attention.
Technical Analysis
This vulnerability arises from an integer overflow condition, where the system fails to properly handle large integer values, leading to unexpected behavior. The attack vector is local, meaning that an attacker must have local administrative privileges on the virtual machine to exploit this vulnerability. The complexity of the attack is low, requiring no user interaction.
The impact on confidentiality, integrity, and availability is high, as successful exploitation could lead to unauthorized access and control over the host system.
Risk & Impact Analysis
Risk to organizations includes the potential for unauthorized access and control over critical systems. The blast radius of this vulnerability is significant, as it could affect the integrity and confidentiality of sensitive data hosted on the affected systems. Organizations should assess their exposure and prioritize remediation efforts, especially considering the high CVSS score and the associated risks.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected by this vulnerability. Organizations should remain vigilant and monitor for any updates from VMware regarding patches for this critical issue.
Mitigation & Remediation
Organizations should prioritize patching immediately to address this vulnerability. Ensure that updates from VMware are applied as soon as they are available. Additionally, consider implementing network controls to limit access to the VMXNET3 virtual network adapter and monitor for any unusual behavior that may indicate an attempt to exploit this vulnerability. For further guidance on security testing, organizations can refer to penetration testing services.
Detection Guidance
Organizations should monitor logs for any suspicious activity related to the VMXNET3 virtual network adapter. Behavioral anomalies and unauthorized access attempts should be logged and investigated. Additionally, network signatures that indicate attempts to exploit this vulnerability should be established to enhance detection capabilities.
AppSecure Threat Intelligence Insight
This vulnerability represents a concerning trend in the increasing complexity of attacks targeting virtualization platforms. Security teams must remain vigilant and proactive in addressing such vulnerabilities to protect critical infrastructure. Organizations should consider enhancing their security posture through comprehensive penetration testing methodologies and regular security assessments. For additional insights into vulnerability management, the vulnerability management program design is crucial for maintaining an effective security posture. Organizations can also benefit from understanding the latest trends in vulnerability exposure severity to stay ahead of potential threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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