CVE-2020-3994 : Exploit Details and Defense Strategies
Learn about CVE-2020-3994 affecting VMware vCenter Server versions 6.7 before 6.7u3 and 6.6 before 6.5u3k. Find mitigation steps and long-term security practices to prevent session hijacking.
VMware vCenter Server (6.7 before 6.7u3, 6.6 before 6.5u3k) contains a session hijack vulnerability in the vCenter Server Appliance Management Interface update function due to a lack of certificate validation. A malicious actor with network positioning between vCenter Server and an update repository may be able to perform a session hijack when the vCenter Server Appliance Management Interface is used to download vCenter updates.
Understanding CVE-2020-3994
This CVE involves a session hijack vulnerability in VMware vCenter Server.
What is CVE-2020-3994?
CVE-2020-3994 is a vulnerability in VMware vCenter Server that allows a malicious actor to hijack sessions during the update process.
The Impact of CVE-2020-3994
The vulnerability could be exploited by an attacker positioned between the vCenter Server and an update repository to hijack sessions and potentially gain unauthorized access.
Technical Details of CVE-2020-3994
This section provides technical details of the vulnerability.
Vulnerability Description
- Type: Session hijack vulnerability
- Target: VMware vCenter Server
- Versions Affected: 6.7 before 6.7u3, 6.6 before 6.5u3k
- Cause: Lack of certificate validation in the update function
Affected Systems and Versions
- Product: vCenter Server
- Versions: vCenter Server (6.7 before 6.7u3, 6.6 before 6.5u3k)
Exploitation Mechanism
The vulnerability is exploited by a malicious actor with network positioning between vCenter Server and an update repository.
Mitigation and Prevention
Protect your systems from CVE-2020-3994 with the following steps:
Immediate Steps to Take
- Apply security patches provided by VMware promptly.
- Monitor network traffic for any suspicious activity.
- Restrict access to the vCenter Server Appliance Management Interface.
Long-Term Security Practices
- Implement network segmentation to limit exposure to potential attackers.
- Regularly update and maintain SSL certificates for secure communication.
- Conduct security training for staff to recognize and report suspicious activities.
Patching and Updates
- Stay informed about security advisories from VMware.
- Regularly update VMware vCenter Server to the latest secure versions.