Full Report
CVE-2025-3248 is an unauthenticated remote code execution (RCE) vulnerability in Langflow, a popular Python-based framework for building AI applications. The flaw lies in the code validation endpoint, which fails to enforce authentication or sandboxing when parsing and executi...
Analysis Summary
# Vulnerability: Unauthenticated RCE in Langflow via Code Validation Endpoint
## CVE Details
- CVE ID: CVE-2025-3248
- CVSS Score: (Severity score not explicitly provided in context, implying high severity given RCE nature) (High)
- CWE: CWE-94 (Improper Control of Generation of Code ('Code Injection'))
## Affected Systems
- Products: Langflow (Python-based framework for building AI applications)
- Versions: Not specified, assumed all versions prior to patch.
- Configurations: Any deployment using the vulnerable code validation endpoint.
## Vulnerability Description
CVE-2025-3248 is an unauthenticated Remote Code Execution (RCE) vulnerability within Langflow. The flaw exists because the code validation endpoint fails to enforce proper authentication or environment sandboxing when processing user-supplied Python code. An attacker can trigger this by sending malicious POST requests containing embedded Python code. This code is subsequently parsed and executed using standard Python functions like `ast.parse()`, `compile()`, and `exec()`.
## Exploitation
- Status: Exploited in the wild (Used to deploy the Flodrix botnet)
- Complexity: Low (Implied by unauthenticated access and direct payload delivery via crafted requests)
- Attack Vector: Network
## Impact
- Confidentiality: High (Remote code execution allows for data exfiltration)
- Integrity: High (Full system compromise allows for unauthorized changes)
- Availability: High (Used to deploy DDoS malware; system can be taken offline)
## Remediation
### Patches
- [Patches are not explicitly detailed in the provided text, users must consult vendor advisories for the patched version.]
### Workarounds
- Restrict network access to the application's endpoints, particularly API endpoints handling code validation.
- Implement strict Web Application Firewall (WAF) rules to inspect POST payloads targeting the code validation route for suspicious Python execution keywords.
## Detection
- **Indicators of Compromise (IOCs):** Observed deployment included downloader scripts named `docker` and `deez`. Look for unusual outbound connections associated with the Flodrix botnet C2 channels (TCP/UDP).
- **Detection Methods and Tools:** Monitor application logs for unauthenticated POST requests accessing code validation or execution endpoints. Deploy endpoint detection and response (EDR) tools capable of detecting the execution of Python interpreters spawned by the web service process.
## References
- Vendor Advisory: hxxps://www.trendmicro.com/en-us/research/25/f/langflow-vulnerability-flodric-botnet.html