CVE-2024-42835
📋 TL;DR
CVE-2024-42835 is a critical remote code execution vulnerability in langflow v1.0.12 that allows attackers to execute arbitrary Python code via the PythonCodeTool component. This affects all users running the vulnerable version of langflow, potentially compromising entire systems.
💻 Affected Systems
- langflow
📦 What is this software?
Langflow by Langflow
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover: attacker gains full control of the server, can steal data, deploy ransomware, pivot to other systems, and maintain persistent access.
Likely Case
Data exfiltration and lateral movement: attacker exploits the vulnerability to access sensitive data, install backdoors, and move through the network.
If Mitigated
Limited impact due to network segmentation and strict access controls, potentially only affecting the langflow instance itself.
🎯 Exploit Status
The GitHub issue shows exploitation details. RCE via PythonCodeTool suggests straightforward exploitation for attackers with basic Python knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.0.13 or later
Vendor Advisory: https://github.com/langflow-ai/langflow/issues/2908
Restart Required: Yes
Instructions:
1. Backup your langflow configuration and data. 2. Update langflow using pip: 'pip install --upgrade langflow'. 3. Restart the langflow service. 4. Verify the version is v1.0.13 or higher.
🔧 Temporary Workarounds
Disable PythonCodeTool
allRemove or disable the vulnerable PythonCodeTool component if not required.
Modify langflow configuration to disable PythonCodeTool functionality
Network Isolation
allRestrict network access to langflow instances.
Configure firewall rules to limit access to trusted IPs only
🧯 If You Can't Patch
- Immediately isolate affected systems from production networks
- Implement strict network segmentation and monitor all traffic to/from langflow instances
🔍 How to Verify
Check if Vulnerable:
Check langflow version: if running v1.0.12, the system is vulnerable.Check Version:
python -c "import langflow; print(langflow.__version__)"Verify Fix Applied:
Verify langflow version is v1.0.13 or higher and test that PythonCodeTool functionality is properly secured.📡 Detection & Monitoring
Log Indicators:
- Unusual Python execution patterns in langflow logs
- Suspicious code execution via PythonCodeTool
Network Indicators:
- Unexpected outbound connections from langflow server
- Traffic to known malicious IPs
SIEM Query:
source="langflow" AND (event="code_execution" OR event="python_tool")