CVE-2025-64736
📋 TL;DR
An out-of-bounds read vulnerability in libbiosig's ABF file parser allows attackers to leak sensitive information by providing malicious .abf files. This affects systems using libbiosig 3.9.2 and the master branch commit 5462afb0 for processing ABF (Axon Binary Format) files, commonly used in electrophysiology research.
💻 Affected Systems
- The Biosig Project libbiosig
📦 What is this software?
Libbiosig by Libbiosig Project
⚠️ Risk & Real-World Impact
Worst Case
Memory disclosure could expose sensitive data including credentials, encryption keys, or proprietary research data from the application's memory space.
Likely Case
Information leak revealing portions of process memory, potentially exposing file contents or other data being processed by the application.
If Mitigated
Limited information disclosure with no direct code execution, but potential for data exposure.
🎯 Exploit Status
Exploitation requires crafting malicious ABF files; no authentication needed if application processes external files.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check upstream repository for fixes after commit 5462afb0
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2025-2323
Restart Required: Yes
Instructions:
1. Check current libbiosig version. 2. Update to patched version from official repository. 3. Restart applications using libbiosig. 4. Recompile if using library directly.
🔧 Temporary Workarounds
Restrict ABF file processing
allLimit processing of ABF files to trusted sources only
Input validation
allImplement file validation before passing to libbiosig parser
🧯 If You Can't Patch
- Isolate systems processing ABF files from sensitive networks
- Implement strict file upload controls and scanning for ABF files
🔍 How to Verify
Check if Vulnerable:
Check libbiosig version: biosig-tools --version or examine library version in applicationsCheck Version:
biosig-tools --version 2>/dev/null || find /usr -name '*biosig*' -type f | xargs strings 2>/dev/null | grep -i versionVerify Fix Applied:
Verify updated version no longer matches vulnerable versions; test with known safe ABF files📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing ABF files
- Memory access violation errors in application logs
Network Indicators:
- Unusual ABF file uploads to research systems
- Multiple failed file processing attempts
SIEM Query:
source="*application.log*" AND ("segmentation fault" OR "memory violation" OR "abf")