CVE-2024-33873
📋 TL;DR
CVE-2024-33873 is a heap-based buffer overflow vulnerability in the HDF5 library's H5D__scatter_mem function. This allows attackers to execute arbitrary code or cause denial of service by providing specially crafted HDF5 files. Any application using HDF5 library versions through 1.14.3 for reading or writing HDF5 files is potentially affected.
💻 Affected Systems
- HDF5 Library
- Any software using HDF5 library
📦 What is this software?
Hdf5 by Hdfgroup
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with the privileges of the application using HDF5, potentially leading to complete system compromise.
Likely Case
Application crash (denial of service) when processing malicious HDF5 files, potentially disrupting data processing workflows.
If Mitigated
Limited impact if applications run with minimal privileges and process only trusted HDF5 files.
🎯 Exploit Status
Exploitation requires crafting malicious HDF5 files that trigger the buffer overflow during scatter operations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HDF5 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 https://www.hdfgroup.org/downloads/hdf5/. 2. Compile and install following platform-specific build instructions. 3. Recompile any applications using HDF5 against the new library. 4. Restart affected applications and services.
🔧 Temporary Workarounds
Input validation for HDF5 files
allImplement strict validation of HDF5 files before processing, rejecting files from untrusted sources.
Sandbox HDF5 processing
linuxRun HDF5 processing in isolated containers or with reduced privileges to limit potential damage.
docker run --read-only --cap-drop=ALL -v /trusted/data:/data your_app
🧯 If You Can't Patch
- Restrict HDF5 file processing to trusted sources only
- Run applications with minimal privileges (non-root users, SELinux/AppArmor restrictions)
🔍 How to Verify
Check if Vulnerable:
Check HDF5 library version: h5dump --version or ldd on application binaries to check linked HDF5 library.Check Version:
h5dump --version 2>/dev/null | head -1Verify Fix Applied:
Verify HDF5 version is 1.14.4 or later: h5dump --version | grep -q '1\.14\.[4-9]\|1\.1[5-9]'📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults when processing HDF5 files
- Memory corruption errors in application logs
Network Indicators:
- Unusual HDF5 file uploads to web applications
- Large HDF5 file transfers to internal systems
SIEM Query:
source="application.logs" AND ("segmentation fault" OR "buffer overflow") AND "HDF5"