CVE-2025-8404
📋 TL;DR
This CVE describes a stack buffer overflow vulnerability in Supermicro BMC shared libraries that allows authenticated attackers to execute arbitrary code on the BMC firmware. It affects Supermicro servers with vulnerable BMC firmware versions. Attackers need BMC authentication credentials to exploit this vulnerability.
💻 Affected Systems
- Supermicro servers with BMC/IPMI functionality
⚠️ 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 firmware allowing persistent attacker foothold, firmware modification, and potential lateral movement to host operating system.
Likely Case
Attacker gains control of BMC to monitor/manipulate server hardware, potentially leading to data exfiltration or denial of service.
If Mitigated
Limited impact due to network segmentation and strong authentication controls preventing attacker access to BMC interfaces.
🎯 Exploit Status
Requires authentication and specific header crafting; no public exploit details available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Supermicro security advisory for specific patched versions
Vendor Advisory: https://www.supermicro.com/zh_tw/support/security_BMC_IPMI_Nov_2025
Restart Required: Yes
Instructions:
1. Identify affected Supermicro server models
2. Download updated BMC firmware from Supermicro support portal
3. Follow Supermicro's BMC firmware update procedure
4. Verify successful update and functionality
🔧 Temporary Workarounds
Network segmentation
allIsolate BMC management interfaces from general network access
Strong authentication enforcement
allImplement complex passwords and multi-factor authentication for BMC access
🧯 If You Can't Patch
- Segment BMC management network completely from production networks
- Implement strict access controls and monitoring for BMC interfaces
🔍 How to Verify
Check if Vulnerable:
Check BMC firmware version against Supermicro's advisory; vulnerable if running affected versionsCheck Version:
ipmitool mc info (Linux) or check via Supermicro IPMI web interfaceVerify Fix Applied:
Verify BMC firmware version matches patched version from Supermicro advisory📡 Detection & Monitoring
Log Indicators:
- Unusual BMC authentication attempts
- BMC firmware modification events
- Multiple failed BMC login attempts
Network Indicators:
- Unusual traffic to BMC IPMI ports (623/UDP, 443/TCP)
- Suspicious HTTP headers in BMC web interface requests
SIEM Query:
source="BMC" AND (event_type="authentication_failure" OR event_type="firmware_modification")