Missing Authorization Check in Velociraptor VQL Plugins

Executive Summary

This vulnerability is a missing authorization check in Velociraptor's upload_azure, upload_sftp, and upload_smb VQL plugins. An authenticated user with the analyst role can bypass the NETWORK ACL permission boundary to initiate unauthorized outbound network connections from the Velociraptor server.

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Detection Guidance

Check Velociraptor server logs for unauthorized outbound connections initiated by analyst-role users. Review VQL plugin usage for upload_azure, upload_sftp, and upload_smb functions. Monitor network traffic for unexpected connections from the Velociraptor server to external endpoints.

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Impact Analysis

An attacker with analyst access could perform internal network reconnaissance like port scanning or exfiltrate data to external endpoints by exploiting this flaw to create unauthorized network connections.

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Compliance Impact

This vulnerability allows unauthorized outbound network connections and potential data exfiltration, which could violate data protection requirements under GDPR (e.g., unauthorized data transfers) and HIPAA (e.g., unauthorized access to protected health information). The lack of authorization checks undermines access control policies required by these standards.

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Mitigation Strategies

Upgrade Velociraptor to version 0.77.2 or later to apply the authorization checks. Ensure all users with analyst role have the NETWORK permission explicitly granted. Review and restrict NETWORK ACL permissions to prevent unauthorized outbound connections.

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