CVE-2023-31037
📋 TL;DR
This vulnerability allows root users on NVIDIA Bluefield DPU BMC systems to inject and execute arbitrary code through ipmitool network calls. It affects NVIDIA Bluefield 2 and Bluefield 3 DPU BMC systems, potentially allowing attackers with root access to compromise the operating system.
💻 Affected Systems
- NVIDIA Bluefield 2 DPU BMC
- NVIDIA Bluefield 3 DPU BMC
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root-level code execution, allowing attackers to install persistent backdoors, exfiltrate sensitive data, or pivot to other systems in the network.
Likely Case
Privilege escalation from root to full system control, enabling attackers to modify system configurations, install malware, or disrupt DPU operations.
If Mitigated
Limited impact if proper network segmentation and access controls prevent root users from making malicious ipmitool calls.
🎯 Exploit Status
Exploitation requires root access to the BMC system. The vulnerability is in code injection through ipmitool network calls.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to NVIDIA advisory for specific patched versions
Vendor Advisory: https://nvidia.custhelp.com/app/answers/detail/a_id/5511
Restart Required: Yes
Instructions:
1. Check NVIDIA advisory for specific patched firmware versions. 2. Download updated BMC firmware from NVIDIA. 3. Apply firmware update following NVIDIA's documentation. 4. Reboot the DPU system.
🔧 Temporary Workarounds
Restrict ipmitool network access
allLimit network access to ipmitool services to prevent malicious calls
Configure firewall rules to restrict access to ipmitool ports (typically 623/UDP)
Monitor root user activity
linuxImplement enhanced monitoring of root user actions on BMC systems
Enable detailed audit logging for root user commands and network calls
🧯 If You Can't Patch
- Implement strict network segmentation to isolate BMC management interfaces
- Enforce least privilege access controls and monitor all root user activity on BMC systems
🔍 How to Verify
Check if Vulnerable:
Check BMC firmware version against NVIDIA's advisory. Systems with unpatched firmware versions are vulnerable.Check Version:
ipmitool mc info | grep 'Firmware Revision'Verify Fix Applied:
Verify BMC firmware has been updated to patched version specified in NVIDIA advisory📡 Detection & Monitoring
Log Indicators:
- Unusual ipmitool network calls from root users
- Suspicious command execution patterns in BMC logs
Network Indicators:
- Unexpected network traffic to ipmitool port 623/UDP from unauthorized sources
SIEM Query:
source="bmc_logs" AND (event="ipmitool" OR port=623) AND user="root" AND command="*injection*"