CVE-2021-0101
📋 TL;DR
A buffer overflow vulnerability in the BMC firmware for Intel Server Board M10JNP2SB allows unauthenticated attackers with adjacent network access to potentially execute arbitrary code and escalate privileges. This affects servers running BMC firmware versions before 8100.01.08 and EFI BIOS before 7215. Attackers must be on the same local network segment as the vulnerable server.
💻 Affected Systems
- Intel Server Board M10JNP2SB
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the BMC with persistent access, allowing attackers to control server hardware, install malware, or disrupt operations even through host OS reinstalls.
Likely Case
Unauthenticated attackers gaining BMC administrative access to monitor/manage server hardware, potentially leading to host OS compromise or denial of service.
If Mitigated
Attackers blocked by network segmentation and access controls, limiting impact to isolated management network segments.
🎯 Exploit Status
Buffer overflow requires crafting specific network packets to the BMC interface. No public exploit code available as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: BMC firmware 8100.01.08 or later, EFI BIOS 7215 or later
Vendor Advisory: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00474.html
Restart Required: Yes
Instructions:
1. Download updated firmware from Intel support site. 2. Backup current BMC configuration. 3. Apply BMC firmware update via web interface or IPMI tool. 4. Apply EFI BIOS update via UEFI shell or F7 method. 5. Reboot server and verify versions.
🔧 Temporary Workarounds
Network Segmentation
allIsolate BMC management interfaces on dedicated VLAN with strict access controls
Access Control Lists
allImplement firewall rules to restrict BMC interface access to authorized management systems only
🧯 If You Can't Patch
- Segment BMC management network completely from production and user networks
- Implement strict IP-based access controls and monitor for unauthorized BMC access attempts
🔍 How to Verify
Check if Vulnerable:
Check BMC firmware version via IPMI: ipmitool mc info | grep 'Firmware Revision'Check Version:
ipmitool mc info | grep 'Firmware Revision' for BMC; dmidecode -t bios for BIOS versionVerify Fix Applied:
Verify BMC firmware is 8100.01.08 or higher and EFI BIOS is 7215 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual BMC authentication failures
- BMC configuration changes from unexpected sources
- Multiple failed BMC login attempts
Network Indicators:
- Unusual traffic to BMC IPMI ports (623 UDP/TCP)
- Network scans targeting port 623
- BMC protocol anomalies
SIEM Query:
source="BMC_logs" AND (event_type="authentication_failure" OR event_type="configuration_change")