CVE-2024-33876
📋 TL;DR
CVE-2024-33876 is a heap buffer overflow vulnerability in the HDF5 library's H5S__point_deserialize function. This allows attackers to potentially execute arbitrary code or cause denial of service by providing specially crafted HDF5 files. Anyone using HDF5 library versions through 1.14.3 to process untrusted HDF5 files is affected.
💻 Affected Systems
- HDF5 Library
📦 What is this software?
Hdf5 by Hdfgroup
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if the vulnerable process has high privileges.
Likely Case
Application crash (denial of service) or limited memory corruption leading to unstable behavior.
If Mitigated
Controlled crash with minimal impact if proper sandboxing and privilege separation are implemented.
🎯 Exploit Status
Exploitation requires crafting malicious HDF5 files that trigger the deserialization vulnerability. No public exploits are known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.14.4 and later
Vendor Advisory: https://www.hdfgroup.org/2024/05/new-hdf5-cve-issues-fixed-in-1-14-4/
Restart Required: Yes
Instructions:
1. Download HDF5 1.14.4 or later from https://www.hdfgroup.org/downloads/hdf5/. 2. Uninstall current HDF5 version. 3. Install the patched version. 4. Recompile any applications that link against HDF5. 5. Restart affected services.
🔧 Temporary Workarounds
Input Validation
allValidate all HDF5 files before processing to ensure they come from trusted sources.
Sandboxing
linuxRun HDF5 processing in isolated containers or sandboxes with minimal privileges.
docker run --read-only --cap-drop=ALL -v /trusted/data:/data:ro your_app
🧯 If You Can't Patch
- Implement strict file validation to only process HDF5 files from trusted sources
- Deploy application-level firewalls or WAFs to block malicious file uploads
🔍 How to Verify
Check if Vulnerable:
Check HDF5 library version: h5dump --version or check linked library version in applications.Check Version:
h5dump --version | grep -o 'HDF5 [0-9.]*'Verify Fix Applied:
Confirm version is 1.14.4 or later and test with known safe HDF5 files.📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults when processing HDF5 files
- Memory corruption errors in application logs
Network Indicators:
- Unexpected HDF5 file uploads to web services
- Large HDF5 file downloads from untrusted sources
SIEM Query:
source="application.log" AND ("segmentation fault" OR "buffer overflow") AND "HDF5"