CVE-2024-38279
📋 TL;DR
This vulnerability allows attackers to bypass authentication by modifying bootloader arguments, gaining access to the file system and password hashes. It affects industrial control systems using the vulnerable product. Physical or local access is typically required for exploitation.
💻 Affected Systems
- Specific product names not provided in CISA advisory
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with password hash extraction leading to credential theft and lateral movement within the network.
Likely Case
Local attacker gains unauthorized file system access and extracts password hashes for offline cracking.
If Mitigated
Limited impact with proper physical security controls and bootloader protection mechanisms in place.
🎯 Exploit Status
Requires physical access or local system access to modify bootloader arguments. Authentication bypass is achieved through custom boot arguments.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-165-19
Instructions:
Contact the product vendor for specific patching instructions. Monitor CISA ICS advisories for updates.
🔧 Temporary Workarounds
Physical Security Controls
allRestrict physical access to devices to prevent bootloader manipulation
Secure Boot Configuration
allConfigure bootloader to require authentication for argument modification
🧯 If You Can't Patch
- Implement strict physical access controls and surveillance for affected devices
- Monitor for unauthorized bootloader modifications and implement file integrity monitoring
🔍 How to Verify
Check if Vulnerable:
Check with vendor for specific vulnerability assessment tools or review bootloader configuration settingsCheck Version:
Vendor-specific command - consult product documentationVerify Fix Applied:
Verify with vendor that bootloader authentication cannot be bypassed with custom arguments📡 Detection & Monitoring
Log Indicators:
- Unauthorized bootloader modifications
- Unusual boot arguments
- Failed authentication attempts during boot
Network Indicators:
- Not applicable - local/physical attack vector
SIEM Query:
Search for bootloader modification events or unauthorized system access following boot sequence