CVE-2023-25533
📋 TL;DR
This vulnerability in NVIDIA DGX H100 BMC's web UI allows improper input validation, potentially enabling attackers to execute arbitrary code, escalate privileges, or disclose sensitive information. It affects organizations using NVIDIA DGX H100 systems with vulnerable BMC firmware. The high CVSS score indicates significant security risk.
💻 Affected Systems
- NVIDIA DGX H100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary code with highest privileges, access sensitive data, and potentially pivot to other systems in the network.
Likely Case
Information disclosure and limited code execution leading to credential theft and further lateral movement within the infrastructure.
If Mitigated
Minimal impact if proper network segmentation and access controls prevent external access to BMC interfaces.
🎯 Exploit Status
The vulnerability description suggests unauthenticated exploitation is possible through the web UI
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NVIDIA advisory for specific patched firmware version
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5473
Restart Required: Yes
Instructions:
1. Access NVIDIA support portal
2. Download latest BMC firmware for DGX H100
3. Follow NVIDIA's firmware update procedures
4. Reboot the BMC after update completion
🔧 Temporary Workarounds
Restrict BMC Network Access
allLimit access to BMC web interface to trusted management networks only
Configure firewall rules to restrict access to BMC IP/ports
Disable Web UI if Not Needed
allDisable the web interface if alternative management methods are available
Consult NVIDIA documentation for disabling web UI
🧯 If You Can't Patch
- Implement strict network segmentation to isolate BMC interfaces from untrusted networks
- Enable multi-factor authentication and strong access controls for BMC access
🔍 How to Verify
Check if Vulnerable:
Check BMC firmware version against NVIDIA's advisory for vulnerable versionsCheck Version:
Check BMC web interface or use IPMI commands to query firmware versionVerify Fix Applied:
Verify BMC firmware version matches or exceeds the patched version listed in NVIDIA advisory📡 Detection & Monitoring
Log Indicators:
- Unusual web UI access patterns
- Multiple failed authentication attempts to BMC
- Unexpected process execution on BMC
Network Indicators:
- Unusual traffic to BMC web ports (typically 80/443)
- Suspicious HTTP requests to BMC interface
SIEM Query:
source="bmc_logs" AND (event="authentication_failure" OR event="web_ui_access")