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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

Your e-commerce platform's Linux API servers are fully patched, yet a threat-intelligence alert says attackers are exploiting a previously undocumented buffer-overflow flaw in the open-source JSON parser the application uses. No CVE or vendor fix exists, and the business cannot afford downtime. To reduce exposure to this zero-day while keeping the service online, what is the BEST immediate action?

  • Disable HTTPS on the API endpoints so inline IDS can inspect all traffic for malicious content.

  • Schedule frequent antivirus signature updates on the hosts and wait for the official vendor patch.

  • Create and deploy custom blocking or input-validation rules on the web application firewall to virtually patch the vulnerability.

  • Lower the parser process priority and monitor for crashes to recover quickly if the exploit triggers.

ISC2 Systems Security Certified Practitioner (SSCP)
Systems and Application Security
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