Privilege Escalation via Hunt Compilation in Velociraptor

Executive Summary

This is a privilege escalation vulnerability in Velociraptor, a digital forensics tool. It allows an investigator-level user to set the internal 'compiled_collector_args' field via API calls, bypassing access controls. This lets them run arbitrary VQL statements with administrator privileges on the server.

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Detection Guidance

To detect this vulnerability, check Velociraptor server logs for unauthorized modifications to hunt objects or attempts to set the 'compiled_collector_args' field via API calls. Look for suspicious VQL execution attempts by investigator-level users. Ensure all users have the least privileges required and monitor for privilege escalation patterns.

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Impact Analysis

An attacker with investigator access could escalate to full admin rights, gaining control over the Velociraptor server. This could lead to unauthorized data access, manipulation, or system compromise, depending on the server's role in your environment.

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Compliance Impact

This vulnerability could lead to unauthorized access or modification of sensitive data, violating GDPR's data protection principles or HIPAA's security requirements. Compliance may be compromised if the tool is used for handling regulated data.

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Mitigation Strategies

Update Velociraptor to version 0.77.2 or later to address the improper privilege management flaw. Ensure only authorized users have investigator-level access and review hunt configurations for unauthorized modifications to internal fields like compiled_collector_args.

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