CVE-2021-25169
📋 TL;DR
A buffer overflow vulnerability in HPE Apollo 70 System BMC firmware allows local attackers to execute arbitrary code with elevated privileges. This affects systems running BMC firmware versions prior to 3.0.14.0. Attackers with local access to the BMC interface can potentially compromise the management controller.
💻 Affected Systems
- HPE Apollo 70 System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the BMC allowing persistent access, firmware modification, and potential lateral movement to connected systems.
Likely Case
Local privilege escalation leading to BMC control, management interface compromise, and potential denial of service.
If Mitigated
Limited impact due to network segmentation and restricted BMC access, with only authorized administrators able to exploit.
🎯 Exploit Status
Exploitation requires local access to the BMC interface. No public exploit code is known, but buffer overflow vulnerabilities in management controllers are frequently targeted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.14.0 or later
Vendor Advisory: https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf04080en_us
Restart Required: Yes
Instructions:
1. Download firmware version 3.0.14.0 or later from HPE Support. 2. Access BMC web interface or use HPE iLO tools. 3. Upload and apply firmware update. 4. Reboot the BMC controller.
🔧 Temporary Workarounds
Restrict BMC Network Access
allLimit network access to BMC interfaces to only authorized management networks and IPs.
Configure firewall rules to restrict access to BMC IP addresses on ports 80/443/623
Disable Unnecessary BMC Services
allDisable any BMC services not required for operations to reduce attack surface.
Use HPE iLO configuration tools to disable unnecessary web services
🧯 If You Can't Patch
- Isolate BMC management network from production networks
- Implement strict access controls and monitoring for BMC interfaces
🔍 How to Verify
Check if Vulnerable:
Check BMC firmware version via web interface or SSH: ssh admin@bmc-ip 'show /system1/fwversion'Check Version:
ssh admin@bmc-ip 'show /system1/fwversion' or check web interface System InformationVerify Fix Applied:
Verify firmware version is 3.0.14.0 or later using same command📡 Detection & Monitoring
Log Indicators:
- Unusual BMC authentication attempts
- Multiple failed service configuration attempts
- BMC process crashes or restarts
Network Indicators:
- Unusual traffic to BMC web services port
- Multiple connection attempts to websetservicecfg endpoint
SIEM Query:
source="bmc_logs" AND (event="websetservicecfg" OR event="buffer_overflow" OR event="process_crash")