CVE-2025-2309
📋 TL;DR
A critical heap-based buffer overflow vulnerability in HDF5 library's type conversion logic allows attackers with local access to potentially execute arbitrary code or crash applications. This affects systems using HDF5 1.14.6 for scientific data processing. The vulnerability requires local access but has a public proof-of-concept exploit.
💻 Affected Systems
- HDF5 library
📦 What is this software?
Hdf5 by Hdfgroup
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to full system compromise, arbitrary code execution, or data corruption in HDF5 files.
Likely Case
Application crashes, denial of service, or limited data corruption affecting HDF5 file integrity.
If Mitigated
Contained impact with proper sandboxing and privilege separation limiting damage to the affected process.
🎯 Exploit Status
Exploit requires local access and ability to trigger the vulnerable function via malicious HDF5 file processing. Public proof-of-concept demonstrates crash/DoS.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not yet released
Vendor Advisory: Not available yet
Restart Required: Yes
Instructions:
1. Monitor HDF Group security advisories. 2. Apply official patch when released. 3. Recompile/redeploy applications using HDF5. 4. Restart affected services.
🔧 Temporary Workarounds
Restrict HDF5 file processing
allLimit processing of untrusted HDF5 files to isolated environments
Application sandboxing
linuxRun HDF5-using applications with reduced privileges and resource limits
# Linux example using systemd
[Service]
CapabilityBoundingSet=CAP_NET_BIND_SERVICE
NoNewPrivileges=yes
ProtectSystem=strict
ReadWritePaths=/var/lib/yourapp/data
🧯 If You Can't Patch
- Isolate systems using HDF5 from untrusted users and networks
- Implement strict file validation and sanitization for HDF5 inputs
🔍 How to Verify
Check if Vulnerable:
Check HDF5 library version: h5dump --version or check linked library version in applicationsCheck Version:
h5dump --version 2>/dev/null | head -1 || echo "HDF5 not found in PATH"Verify Fix Applied:
Verify updated HDF5 version after patch installation and test with known malicious HDF5 files📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults in HDF5 functions
- Unexpected process termination when processing HDF5 files
- Memory corruption errors in system logs
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Process termination with exit code 139 (SIGSEGV) AND process name contains hdf5-related terms