CVE-2024-22097
📋 TL;DR
A double-free vulnerability in libbiosig's BrainVision header parsing allows arbitrary code execution when processing malicious .vdhr files. This affects systems using libbiosig for biomedical signal processing. Attackers can achieve remote code execution by tricking users or automated systems into opening crafted files.
💻 Affected Systems
- The Biosig Project libbiosig
📦 What is this software?
Fedora by Fedoraproject
Libbiosig by Libbiosig Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the libbiosig process, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Remote code execution on systems processing untrusted .vdhr files, particularly in healthcare/research environments using libbiosig for EEG/ECG data analysis.
If Mitigated
Denial of service or application crash if exploit fails, but memory corruption could still cause instability.
🎯 Exploit Status
Exploit requires victim to process a malicious .vdhr file. No authentication needed. Public PoC available in Talos advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after commit fixing CVE-2024-22097 (check upstream repository)
Vendor Advisory: https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRLGNQM33KAWVWP5RPMAPHWNP3IY5YW/
Restart Required: Yes
Instructions:
1. Update libbiosig to patched version from official repository. 2. Recompile any applications using libbiosig. 3. Restart services using the library.
🔧 Temporary Workarounds
File type restriction
allBlock processing of .vdhr files at application or system level
# Example: Use file extension filtering in web apps
# Configure MIME type restrictions for uploads
Sandbox execution
linuxRun libbiosig processes in isolated containers or sandboxes
docker run --read-only --security-opt no-new-privileges -v /safe/data:/data image
# Use bubblewrap or similar sandboxing tools
🧯 If You Can't Patch
- Implement strict input validation - reject malformed .vdhr files before parsing
- Deploy application allowlisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check libbiosig version: biosig-tools --version or examine library files. If version is 2.5.0 or master branch around ab0ee111, vulnerable.Check Version:
biosig-tools --version 2>/dev/null || strings /usr/lib*/libbiosig* 2>/dev/null | grep -i versionVerify Fix Applied:
Verify updated version doesn't match vulnerable versions. Test with known safe .vdhr files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Multiple free() calls on same memory address in application logs
- Application crashes when processing .vdhr files
- Unexpected child processes spawned from libbiosig applications
Network Indicators:
- Unexpected outbound connections from biomedical data processing systems
- File uploads of .vdhr files to web applications
SIEM Query:
process_name:"biosig" AND (event_type:crash OR process_spawned:unusual)🔗 References
- https://talosintelligence.com/vulnerability_reports/TALOS-2024-1917
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRLGNQM33KAWVWP5RPMAPHWNP3IY5YW/
- https://talosintelligence.com/vulnerability_reports/TALOS-2024-1917
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-1917
