CVE-2024-33877
📋 TL;DR
CVE-2024-33877 is a heap-based buffer overflow vulnerability in the HDF5 library's H5T__conv_struct_opt function. This allows attackers to execute arbitrary code or cause denial of service by providing specially crafted 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 leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Application crashes causing denial of service, potentially corrupting scientific datasets.
If Mitigated
Limited impact with proper sandboxing and input validation, possibly just crashes.
🎯 Exploit Status
Exploitation requires crafting malicious HDF5 files and convincing users/processes to open them.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: HDF5 Library 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+ from hdfgroup.org. 2. Uninstall old HDF5 version. 3. Install new version following platform-specific instructions. 4. Recompile applications against new library. 5. Restart affected services.
🔧 Temporary Workarounds
Input Validation/Sandboxing
allRestrict HDF5 file processing to trusted sources and run in isolated environments.
Library Hardening
linuxCompile HDF5 with stack protection and ASLR enabled.
CFLAGS="-fstack-protector-strong -D_FORTIFY_SOURCE=2" ./configure
make
make install
🧯 If You Can't Patch
- Isolate HDF5 processing to dedicated virtual machines or containers with minimal privileges.
- Implement strict file upload controls and scan all incoming HDF5 files before processing.
🔍 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 "HDF5"Verify Fix Applied:
Confirm version is 1.14.4+ and test with known safe HDF5 files.📡 Detection & Monitoring
Log Indicators:
- Application crashes with segmentation faults in H5Tconv.c
- Unexpected process termination when handling HDF5 files
Network Indicators:
- Unusual inbound transfers of HDF5 files to vulnerable systems
SIEM Query:
process_name:"h5dump" OR library_loaded:"libhdf5" AND event_type:"crash"