CVE-2025-33205
📋 TL;DR
The NVIDIA NeMo framework contains a vulnerability where attackers can exploit a predefined variable to include functionality from untrusted sources, potentially leading to remote code execution. This affects systems running vulnerable versions of NVIDIA NeMo. Users of the NeMo framework for AI/ML workloads are at risk.
💻 Affected Systems
- NVIDIA NeMo Framework
📦 What is this software?
Nemo by Nvidia
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through remote code execution, allowing attackers to execute arbitrary commands, steal data, or deploy malware.
Likely Case
Limited code execution within the NeMo framework context, potentially compromising AI models, training data, or adjacent systems.
If Mitigated
No impact if proper input validation and security controls prevent exploitation of the predefined variable.
🎯 Exploit Status
Exploitation requires understanding of NeMo's predefined variable handling but doesn't require authentication based on CWE-829 description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NVIDIA advisory for specific patched versions
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5729
Restart Required: Yes
Instructions:
1. Review NVIDIA advisory CVE-2025-33205
2. Identify affected NeMo versions
3. Update to patched version per NVIDIA instructions
4. Restart NeMo services
5. Verify fix implementation
🔧 Temporary Workarounds
Disable vulnerable predefined variables
allRemove or restrict use of the vulnerable predefined variable in NeMo configurations
# Review NeMo configuration files for predefined variable usage
# Comment out or remove vulnerable variable definitions
Network segmentation
allIsolate NeMo systems from untrusted networks
# Configure firewall rules to restrict NeMo network access
# Implement network segmentation for AI/ML environments
🧯 If You Can't Patch
- Implement strict input validation for all NeMo variable inputs
- Monitor NeMo systems for unusual activity or code execution attempts
🔍 How to Verify
Check if Vulnerable:
Check NeMo version against NVIDIA advisory; examine configuration for vulnerable predefined variable usageCheck Version:
nemo --version or check NeMo package version in Python: import nemo; print(nemo.__version__)Verify Fix Applied:
Verify NeMo version is updated to patched version; test that predefined variable exploitation no longer works📡 Detection & Monitoring
Log Indicators:
- Unusual predefined variable modifications in NeMo logs
- Unexpected code execution attempts in NeMo processes
- Anomalous system command execution from NeMo context
Network Indicators:
- Unexpected outbound connections from NeMo systems
- Suspicious payloads targeting NeMo endpoints
SIEM Query:
source="nemo" AND (event="variable_injection" OR event="code_execution")