CVE-2024-33874
📋 TL;DR
CVE-2024-33874 is a critical heap buffer overflow vulnerability in the HDF5 library's H5O__mtime_new_encode function. This allows attackers to execute arbitrary code or cause denial of service by exploiting malformed HDF5 files. Any application using HDF5 libraries for scientific data processing is affected.
💻 Affected Systems
- HDF5 Library
- Applications using HDF5 (e.g., scientific software, data analysis tools)
📦 What is this software?
Hdf5 by Hdfgroup
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with full system compromise, data corruption, or complete system crash.
Likely Case
Application crashes leading to denial of service and potential data loss in scientific workflows.
If Mitigated
Limited impact with proper sandboxing and input validation, but still potential for service disruption.
🎯 Exploit Status
Exploitation requires processing a malicious HDF5 file, which could be delivered via email, downloads, or uploads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.14.4
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 from the HDF Group website. 2. Uninstall the vulnerable version. 3. Install version 1.14.4. 4. Restart any applications using HDF5.
🔧 Temporary Workarounds
Input Validation
allValidate and sanitize HDF5 files before processing, especially from untrusted sources.
Sandboxing
linuxRun HDF5 processing in isolated containers or sandboxes to limit potential damage.
docker run --rm -v /path/to/files:/data hdf5-processing-tool
🧯 If You Can't Patch
- Restrict HDF5 file processing to trusted sources only.
- Implement network segmentation to isolate systems using HDF5 from critical infrastructure.
🔍 How to Verify
Check if Vulnerable:
Check HDF5 library version: h5dump --version or ldd on binaries linking to libhdf5.Check Version:
h5dump --version 2>&1 | grep -i versionVerify Fix Applied:
Confirm version is 1.14.4 or later using h5dump --version.📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults
- Unexpected memory access errors in logs
Network Indicators:
- Unusual file uploads of HDF5 files to web services
- Downloads of HDF5 files from untrusted sources
SIEM Query:
source="application.log" AND ("segmentation fault" OR "buffer overflow") AND process="*hdf5*"