This program provides integrity monitoring that checks the container’s file system to determine if they have been maliciously modified. If the program detects that files have been modified, updated, added, or compromised, it rolls back the deployment to the previous version.
Using hash functions for integrity monitoring is a common approach to ensure the security of containerized applications. Here’s how you can implement integrity monitoring using hash functions:
Calculate Hashes:
Before deploying a containerized application, calculate the hash value (checksum) of each file in the container’s file system using a secure hash function such as SHA-256. Store the hash values in a secure location, such as a trusted database or configuration file, along with metadata about each file (e.g., file path, permissions). Monitor Changes:
Periodically or continuously monitor the container’s file system for changes, additions, or deletions. Recalculate the hash values of the files in the container’s file system at regular intervals or whenever changes are detected. Compare Hashes:
Compare the recalculated hash values with the stored hash values to determine if any files have been modified or compromised. If the recalculated hash values do not match the stored hash values for any files, it indicates that the files have been tampered with. Rollback Deployment:
If unauthorized changes are detected, initiate a rollback process to revert the container’s file system to the previous known good state. Restore the files from a backup or the previous version of the container image to eliminate the malicious modifications. Alert and Notification:
Send alerts or notifications to system administrators, DevOps teams, or security personnel immediately upon detecting unauthorized changes. Include details about the nature of the changes, affected files, and timestamps to facilitate investigation and remediation. Logging and Auditing:
Log all integrity monitoring events, including hash value comparisons, file modifications, and rollback actions. Maintain audit trails of integrity monitoring activities for compliance and forensic purposes. Automate Remediation:
Automate the rollback and remediation process as much as possible to minimize manual intervention and response times. Implement scripts or workflows to automatically trigger rollback actions based on predefined criteria or thresholds. Continuous Improvement:
Regularly review and update the integrity monitoring process based on emerging threats, security best practices, and lessons learned from incident response activities. Conduct periodic security assessments and vulnerability scans to identify potential weaknesses in the integrity monitoring system. By implementing integrity monitoring using hash functions, you can enhance the security posture of containerized applications and mitigate the risks associated with unauthorized modifications or compromises to the file system
Project link: https://github.com/ScienceSoft-Inc/k8s-container-integrity-monitor