CVE-2024-36435
📋 TL;DR
An unauthenticated stack buffer overflow vulnerability in Supermicro BMC firmware allows remote attackers to execute arbitrary code on affected Baseboard Management Controllers. This affects Supermicro X11, X12, H12, B12, X13, H13, B13 motherboards and CMM6 modules. Attackers can gain complete control of the BMC without authentication.
💻 Affected Systems
- Supermicro X11 motherboards
- Supermicro X12 motherboards
- Supermicro H12 motherboards
- Supermicro B12 motherboards
- Supermicro X13 motherboards
- Supermicro H13 motherboards
- Supermicro B13 motherboards
- Supermicro CMM6 modules
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of BMC allowing persistent access, firmware modification, credential theft, and lateral movement to connected servers.
Likely Case
Remote code execution leading to BMC takeover, server management compromise, and potential data center infiltration.
If Mitigated
Limited impact if BMCs are isolated, patched, and monitored with network segmentation.
🎯 Exploit Status
Unauthenticated exploitation with crafted data suggests relatively straightforward attack vectors.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://www.supermicro.com/zh_tw/support/security_BMC_IPMI_Jul_2024
Restart Required: Yes
Instructions:
1. Check Supermicro security advisory for specific firmware updates. 2. Download appropriate BMC firmware from Supermicro support portal. 3. Apply firmware update through BMC web interface or IPMI tool. 4. Reboot BMC after update completion.
🔧 Temporary Workarounds
Network Segmentation
linuxIsolate BMC management interfaces from untrusted networks
iptables -A INPUT -p tcp --dport 443 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Access Control Lists
allRestrict BMC access to authorized management IPs only
Configure firewall rules to allow only specific source IPs to BMC management ports (typically 443, 623)
🧯 If You Can't Patch
- Implement strict network segmentation to isolate BMC interfaces
- Deploy intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check BMC firmware version against Supermicro's patched versions in security advisoryCheck Version:
ipmitool mc info | grep 'Firmware Revision'Verify Fix Applied:
Verify BMC firmware version has been updated to patched version📡 Detection & Monitoring
Log Indicators:
- Unusual BMC authentication failures
- Multiple failed POST requests to BMC interface
- BMC process crashes or restarts
Network Indicators:
- Unusual traffic patterns to BMC management ports (443, 623)
- Large or malformed POST requests to BMC web interface
SIEM Query:
source="BMC_logs" AND ("POST" AND "buffer" OR "overflow") OR ("authentication failure" AND source_ip NOT IN allowed_management_ips)