CVE-2025-23353
📋 TL;DR
NVIDIA Megatron-LM's msdp preprocessing script contains a code injection vulnerability (CWE-94) that allows attackers to execute arbitrary code by providing malicious data. This affects all platforms running vulnerable versions of NVIDIA Megatron-LM. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- NVIDIA Megatron-LM
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root privileges, data exfiltration, and persistent backdoor installation
Likely Case
Unauthorized code execution within the application context, potentially leading to data tampering and privilege escalation
If Mitigated
Limited impact with proper input validation and sandboxing, potentially only denial of service
🎯 Exploit Status
Exploitation requires ability to provide malicious data to the preprocessing script; no public exploit code available at this time
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NVIDIA advisory for specific patched versions
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5698
Restart Required: No
Instructions:
1. Review NVIDIA advisory CVE-2025-23353. 2. Update NVIDIA Megatron-LM to the latest patched version. 3. Validate the fix by testing with sample inputs.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation and sanitization for all data passed to the msdp preprocessing script
Restrict Script Access
allLimit access to the msdp preprocessing script to trusted users and systems only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate systems running vulnerable versions
- Deploy application-level firewalls to monitor and block suspicious preprocessing script activity
🔍 How to Verify
Check if Vulnerable:
Check if your NVIDIA Megatron-LM version is affected by comparing against the vulnerable version range in the NVIDIA advisoryCheck Version:
Check NVIDIA Megatron-LM documentation for version checking specific to your installationVerify Fix Applied:
After updating, test the msdp preprocessing script with various inputs to ensure proper input validation is working📡 Detection & Monitoring
Log Indicators:
- Unusual process execution from msdp preprocessing script
- Unexpected system commands executed by the script
- Error messages related to script execution failures
Network Indicators:
- Unusual outbound connections from systems running Megatron-LM
- Data exfiltration patterns from affected systems
SIEM Query:
Process execution where parent_process contains 'msdp' AND (process contains 'cmd.exe' OR process contains 'bash' OR process contains 'powershell')