There are several open-source tools available for cloud security audits. Here are some of the best ones:
OpenSCAP: OpenSCAP is a security compliance checking tool that can scan cloud infrastructure and systems for compliance with various security standards and policies.
Lynis: Lynis is an auditing tool that checks for security vulnerabilities in cloud infrastructure and systems, including servers, firewalls, and databases.
Osquery: Osquery is an endpoint monitoring and threat detection tool that can be used to monitor and audit cloud infrastructure and systems.
Cloud Custodian: Cloud Custodian is an open-source tool that provides policy automation for cloud infrastructure. It can be used to audit cloud resources, identify non-compliant resources, and automatically remediate security issues.
Scout Suite: Scout Suite is a security auditing tool for cloud infrastructure that can assess the security posture of cloud accounts, identify potential security vulnerabilities, and provide recommendations for remediation.
Security Monkey: Security Monkey is an open-source security monitoring and alerting tool that can be used to monitor cloud infrastructure for security issues, including misconfigurations and vulnerabilities.
InSpec: InSpec is an open-source compliance and security testing framework that can be used to audit cloud infrastructure and systems. It provides a human-readable language for specifying compliance requirements and can automate auditing processes.