Combat Vulnerability

D.

The correct answer in this scenario is D. Install a vendor-supplied patch.

Explanation: Vulnerabilities are weaknesses or flaws in software that can be exploited by attackers to gain unauthorized access to systems, steal data, or cause other types of damage. When vulnerabilities are discovered, software vendors often release patches or updates that fix the vulnerabilities.

In this scenario, the workstations on the network are running operating system versions that are vulnerable to a specific attack. The corrective action to combat this vulnerability is to install a vendor-supplied patch that addresses the vulnerability. This patch will fix the vulnerability and prevent attackers from exploiting it.

Option A, installing an antivirus definition patch, may help protect against known malware or viruses, but it is not likely to address the underlying vulnerability that is being exploited.

Option B, educating the workstation users, is always a good security practice, but it is not a corrective action that directly addresses the vulnerability.

Option C, leveraging server isolation, may help protect the server from attacks, but it is not a corrective action that directly addresses the vulnerability on the workstations.

Option E, installing an intrusion detection system, may help detect attacks that exploit the vulnerability, but it is not a corrective action that directly addresses the vulnerability.

In conclusion, the best course of action in this scenario is to install the vendor-supplied patch to fix the vulnerability and prevent attackers from exploiting it.