CVE-2023-38896
📋 TL;DR
This vulnerability in LangChain allows remote attackers to execute arbitrary code through the from_math_prompt and from_colored_object_prompt functions. It affects LangChain versions 0.0.194 and earlier. Any application using these vulnerable functions is at risk of complete system compromise.
💻 Affected Systems
- LangChain
📦 What is this software?
Langchain by Langchain
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with remote code execution, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Remote code execution leading to application compromise, data theft, and potential privilege escalation.
If Mitigated
Limited impact with proper input validation and sandboxing, potentially preventing code execution.
🎯 Exploit Status
Exploitation details are publicly available in GitHub issues and security research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.0.195 and later
Vendor Advisory: https://github.com/hwchase17/langchain/pull/6003
Restart Required: No
Instructions:
1. Update LangChain: pip install --upgrade langchain>=0.0.195
2. Verify no vulnerable functions are called with untrusted input
3. Test application functionality after update
🔧 Temporary Workarounds
Disable vulnerable functions
allRemove or disable calls to from_math_prompt and from_colored_object_prompt functions
# Review code for these function calls and remove/disable them
Input validation and sanitization
allImplement strict input validation for any prompt inputs
# Add input validation before passing data to LangChain functions
🧯 If You Can't Patch
- Implement network segmentation to isolate LangChain applications
- Deploy application-level firewalls with strict input validation rules
🔍 How to Verify
Check if Vulnerable:
Check LangChain version: pip show langchain | grep Version
If version <= 0.0.194 and using vulnerable functions, system is vulnerable.Check Version:
pip show langchain | grep VersionVerify Fix Applied:
Verify version >= 0.0.195: pip show langchain | grep Version
Test that vulnerable functions now properly sanitize input.📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from LangChain context
- Error logs showing code execution failures in prompt functions
- Unexpected network connections from LangChain processes
Network Indicators:
- Outbound connections from LangChain to unexpected destinations
- Command and control traffic patterns
SIEM Query:
source="application.logs" AND ("from_math_prompt" OR "from_colored_object_prompt") AND ("exec" OR "system" OR "subprocess")🔗 References
- https://github.com/hwchase17/langchain/issues/5872
- https://github.com/hwchase17/langchain/pull/6003
- https://twitter.com/llm_sec/status/1668711587287375876
- https://github.com/hwchase17/langchain/issues/5872
- https://github.com/hwchase17/langchain/pull/6003
- https://twitter.com/llm_sec/status/1668711587287375876
