VMware NSX Manager Remote Code Execution Scanner

VMware NSX Manager is an integral component of VMware Cloud Foundation, widely used in data centers for network virtualization and security. It facilitates the management of network services, enabling streamlined operations and enhanced security within cloud environments. Companies globally deploy VMware NSX Manager to optimize their IT infrastructure, leveraging its capabilities for efficient network management and improved resource utilization. Organizations that prioritize cloud transformation and agile IT infrastructure often incorporate VMware NSX Manager within their technology stack. Security teams and network administrators specifically rely on NSX Manager to maintain robust security and manage complex network architectures seamlessly. This product represents a critical asset for businesses aiming to elevate their digital resilience and operational agility in a cloud-first world.

Remote Code Execution (RCE) is a critical vulnerability allowing attackers to remotely execute arbitrary code on a vulnerable system. This vulnerability arises when user input is improperly sanitized or validated, enabling malicious actors to inject and execute commands within the system's operating environment. In the context of VMware NSX Manager, this vulnerability leverages the XStream library to manipulate serialized input data, facilitating unauthorized code execution. RCE vulnerabilities are particularly dangerous as they provide attackers with extensive control over the compromised system, potentially leading to data breaches or further exploitation of network assets. The exploitation of RCE vulnerabilities typically does not require authentication, making it easier for attackers to gain access. Proactive detection and remediation are essential to mitigate the risks associated with such vulnerabilities.

The technical details of the Remote Code Execution vulnerability in VMware NSX Manager involve an unauthenticated endpoint susceptible to malicious input. This endpoint utilizes the XStream open-source library for input serialization, a process that, when insecurely implemented, becomes a target for code injection attacks. Attackers can manipulate serialized data to execute commands with root privileges, exploiting the vulnerability to inject payloads that compromise system integrity. The vulnerability stems from inadequate input handling and insufficient authentication checks, exposing NSX Manager to unauthorized access. The manipulation of serialized data can lead to command execution within the affected appliance's operating context, posing significant security risks. Addressing these issues requires enhancing input validation, securing serialization processes, and implementing stringent access controls to prevent exploitation.

The exploitation of a Remote Code Execution vulnerability in VMware NSX Manager can lead to severe consequences, including unauthorized access to sensitive data, system manipulation, and further network compromise. An attacker gaining control through this vulnerability can potentially execute arbitrary commands, install malicious software, or modify system configurations, leading to data corruption or exfiltration. The integrity and availability of the network services managed by NSX Manager can be severely impacted, disrupting business operations. Additionally, compromised systems may become launchpads for further attacks within the network, amplifying the threat's reach and severity. It is imperative to swiftly remediate such vulnerabilities to safeguard against potential data breaches and ensure the continuity of business-critical operations.

REFERENCES

• https://www.vmware.com/security/advisories/VMSA-2022-0027.html
• https://kb.vmware.com/s/article/89809
• https://srcincite.io/blog/2022/10/25/eat-what-you-kill-pre-authenticated-rce-in-vmware-nsx-manager.html
• https://attackerkb.com/topics/ngprN6bu76/cve-2021-39144
• https://github.com/rapid7/metasploit-framework/pull/17222