Vulnerability Remediation - 4.3
Summary
Vulnerability remediation involves applying patches to fix identified vulnerabilities, using compensating controls when patches are delayed, and validating the remediation through rescanning, audits, and verification. Additionally, network segmentation, cyber-insurance, and reporting processes are key components to mitigate risks and ensure system security is maintained.
Notes:
Patching
- The process of resolving identified vulnerabilities in a system by applying updates or fixes to the affected software or hardware.
Insurance
- Cyber-insurance helps mitigate financial losses due to ransomware attacks, data breaches, or legal liabilities that arise from cybersecurity incidents.
Segmentation
- The practice of isolating parts of a network to limit access and contain damage in the event of a system compromise.
Compensating Controls
- Alternative security measures implemented when a patch is unavailable or delayed. These controls provide temporary protection until a proper fix is applied.
Exceptions and Exemptions
- Allowing the use of systems or applications where a patch may not be feasible, with additional safeguards put in place to mitigate the risks.
Validation of Remediation
- Rescanning: Conducting a follow-up scan after a patch has been applied to verify that the vulnerability has been resolved.
- Audit: Reviewing the patch deployment process to confirm that it was installed correctly and addressed the vulnerability.
- Verification: Manually or automatically confirming that the patch is functioning as expected and that the issue is no longer present.
Reporting
- The generation of reports, either automatically or manually, to document the status of system vulnerabilities, remediation efforts, and overall security posture.