CVE-2025-33252
📋 TL;DR
CVE-2025-33252 is a deserialization vulnerability in NVIDIA's NeMo Framework that allows remote attackers to execute arbitrary code. This affects organizations using NVIDIA NeMo for AI/ML development and deployment. Successful exploitation could compromise AI models, training data, and underlying infrastructure.
💻 Affected Systems
- NVIDIA NeMo Framework
📦 What is this software?
Nemo by Nvidia
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the NeMo environment, allowing data theft, model manipulation, and lateral movement to connected systems.
Likely Case
Remote code execution leading to data exfiltration, denial of service affecting AI workloads, and potential compromise of sensitive training data.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially resulting in service disruption but preventing full system compromise.
🎯 Exploit Status
Exploitation requires network access to the NeMo service but no authentication. Attack complexity is medium due to the need for specific deserialization payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.24.0 and later
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5762
Restart Required: Yes
Instructions:
1. Stop all NeMo services. 2. Update to NeMo version 1.24.0 or later using pip: 'pip install nemo-toolkit>=1.24.0'. 3. Restart NeMo services. 4. Verify the update with 'pip show nemo-toolkit'.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to NeMo services to trusted IPs only
iptables -A INPUT -p tcp --dport <nemo_port> -s <trusted_ip> -j ACCEPT
iptables -A INPUT -p tcp --dport <nemo_port> -j DROP
Service Isolation
linuxRun NeMo in isolated containers with minimal privileges
docker run --security-opt=no-new-privileges --cap-drop=ALL -u nobody nemo-container
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure to trusted sources only
- Deploy web application firewall (WAF) with deserialization attack detection rules
🔍 How to Verify
Check if Vulnerable:
Check NeMo version with: 'pip show nemo-toolkit | grep Version' and verify if version is below 1.24.0Check Version:
pip show nemo-toolkit | grep VersionVerify Fix Applied:
Confirm version is 1.24.0 or higher with: 'pip show nemo-toolkit | grep Version'📡 Detection & Monitoring
Log Indicators:
- Unusual process spawns from NeMo services
- Deserialization errors in NeMo logs
- Unexpected network connections from NeMo processes
Network Indicators:
- Unusual traffic patterns to/from NeMo service ports
- Suspicious payloads in network traffic to NeMo endpoints
SIEM Query:
source="nemo.log" AND ("deserialization" OR "unexpected process" OR "unauthorized access")