A systems administrator is analyzing a vulnerability scan report for a production web server. The report lists the following vulnerabilities found on the system. Based on the Common Vulnerability Scoring System (CVSS), which vulnerability should be prioritized for immediate remediation?
An information disclosure vulnerability in the SSH service with a CVSS score of 5.3.
A denial-of-service vulnerability in the kernel's TCP/IP stack with a CVSS score of 7.5.
A cross-site scripting (XSS) vulnerability in the web server's administration interface with a CVSS score of 7.2.
A remote code execution vulnerability in a web application framework with a CVSS score of 9.8.
The Common Vulnerability Scoring System (CVSS) is a standardized framework used to rate the severity of software vulnerabilities. It assigns a numerical score from 0.0 to 10.0, where a higher score indicates a more severe vulnerability. When prioritizing remediation efforts, administrators should address the vulnerability with the highest CVSS score first. In this scenario, the remote code execution (RCE) vulnerability has a CVSS score of 9.8, which falls into the "Critical" severity range (9.0-10.0). This type of vulnerability poses the most significant threat and must be addressed immediately. The other vulnerabilities have lower scores, indicating they are of 'High' (7.0-8.9) or 'Medium' (4.0-6.9) severity, and should be handled after any critical issues are resolved.
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