Horizon Alert
Summary of the vulnerability and why it matters
A critical vulnerability exists in Flowise, a tool for building large language model interfaces, that could allow an authenticated attacker to execute arbitrary system commands with root privileges on the server. This is due to improper handling of JavaScript execution options, which can be exploited to bypass security settings and gain unauthorized access.
- Attackers can run system commands on the server.
- Critical vulnerability allows root-level system command execution.
- Confirm relevance and exposure of this LLM tool.
Attack Path
How an attacker could exploit the issue
An attacker with existing access to the Flowise application could exploit this vulnerability by creating a custom function that manipulates the JavaScript execution environment. This function, when processed by the server, could allow the attacker to import any built-in Node.js module, including `child_process`, thereby enabling the execution of arbitrary commands with root privileges on the server.
- Requires authenticated access.
- Triggers via custom function import.
- Allows arbitrary root command execution.
Live Threat
Current exploitation, exposure, and threat context
An authenticated attacker could execute arbitrary system commands with root privileges on the Flowise server. This is possible when a custom function imports a vulnerable component that allows the import of all built-in modules, enabling the execution of commands through the `child_process` module. The specific conditions for this to occur involve an authenticated attacker who can run custom functions within Flowise.
- System commands could be executed.
- Authenticated attacker with custom function access.
- Full server compromise and data exfiltration.
Operational Fix
Recommended remediation, mitigation, and detection steps
Flowise deployments, typically managed by application or platform teams, require immediate attention to identify all instances and assess their reachability and business criticality. Once accountable owners are confirmed, a risk-based remediation plan should be established, coordinating with vendor-management if necessary.
- Identify application owners and affected instances.
- Verify network exposure and system criticality.
- Plan remediation based on risk assessment.
