CVE-2024-32608: HDF5 Library RCE Vulnerability

CVE-2024-32608 Overview

CVE-2024-32608 is a memory corruption vulnerability affecting the HDF5 library through version 1.14.3. The vulnerability exists in the H5A__close function and can result in the corruption of the instruction pointer, potentially leading to denial of service or arbitrary code execution.

HDF5 (Hierarchical Data Format version 5) is a widely-used open source file format and library designed to store and organize large amounts of scientific data. It is commonly deployed in research institutions, scientific computing environments, and enterprise data analytics platforms, making this vulnerability particularly concerning for organizations handling sensitive research data.

Critical Impact

Memory corruption in H5A__close can corrupt the instruction pointer, enabling attackers to potentially achieve remote code execution or cause denial of service across systems processing malicious HDF5 files.

Affected Products

• HDF5 library versions through 1.14.3
• Applications and systems utilizing vulnerable HDF5 library versions
• Scientific computing and data analytics platforms incorporating HDF5

Discovery Timeline

• 2024-05-01 - HDF Group releases security advisory and patch in version 1.14.4
• 2024-10-09 - CVE-2024-32608 published to NVD
• 2025-03-25 - Last updated in NVD database

Technical Details for CVE-2024-32608

Vulnerability Analysis

This vulnerability is classified as CWE-787 (Out-of-Bounds Write), a memory corruption issue that occurs within the H5A__close function of the HDF5 library. The flaw allows for corruption of the instruction pointer during the attribute closing operation, which is a fundamental operation when managing HDF5 file attributes.

The vulnerability can be triggered when processing specially crafted HDF5 files, making it exploitable through file-based attack vectors. Since HDF5 files are commonly shared between systems and organizations for scientific data exchange, the attack surface extends to any application that processes untrusted HDF5 content.

The network-accessible attack vector indicates that applications serving or processing HDF5 files over network interfaces are at risk. No authentication is required to exploit this vulnerability, and no user interaction is needed, making it particularly dangerous for automated data processing pipelines.

Root Cause

The root cause of CVE-2024-32608 is improper memory handling within the H5A__close function. During the attribute closing process, memory operations are performed without adequate boundary checks, allowing memory to be written outside of allocated buffers. This out-of-bounds write condition can corrupt critical memory structures, including the instruction pointer.

When the instruction pointer is corrupted, the program's execution flow can be hijacked, potentially redirecting execution to attacker-controlled code. The lack of proper validation during memory operations in the attribute management code path is the fundamental issue enabling this vulnerability.

Attack Vector

The attack vector for CVE-2024-32608 involves crafting a malicious HDF5 file that triggers the memory corruption condition when processed by an application using a vulnerable version of the HDF5 library. The attack flow includes:

1. An attacker creates a specially crafted HDF5 file containing malformed attribute data
2. The victim application opens and processes the malicious HDF5 file
3. When the application attempts to close attributes via H5A__close, the memory corruption is triggered
4. The instruction pointer corruption occurs, enabling denial of service or potential code execution

The vulnerability mechanism centers on the attribute handling subsystem of HDF5. When H5A__close processes attribute metadata, insufficient bounds checking allows memory corruption. For detailed technical analysis and exploitation specifics, refer to the HDF Group security advisory.

Detection Methods for CVE-2024-32608

Indicators of Compromise

• Unexpected application crashes or segmentation faults when processing HDF5 files
• Anomalous memory access patterns detected by runtime protection tools
• Core dumps showing corruption in HDF5 library address space
• Unusual file access patterns involving HDF5 files from untrusted sources

Detection Strategies

• Monitor for crash reports or abnormal terminations in applications using HDF5 library functions
• Implement file integrity monitoring on HDF5 files in shared or network-accessible directories
• Deploy endpoint detection and response (EDR) solutions to identify memory corruption exploitation attempts
• Analyze network traffic for suspicious HDF5 file transfers from untrusted sources

Monitoring Recommendations

• Enable verbose logging in applications processing HDF5 files to capture attribute operation failures
• Configure system crash reporters to capture memory corruption events for forensic analysis
• Implement file upload scanning for malformed HDF5 content before processing
• Monitor system resource utilization for signs of exploitation attempts or denial of service

How to Mitigate CVE-2024-32608

Immediate Actions Required

• Upgrade the HDF5 library to version 1.14.4 or later immediately
• Audit systems and applications to identify all instances of vulnerable HDF5 library versions
• Restrict processing of HDF5 files from untrusted or unverified sources
• Implement network segmentation to isolate systems processing HDF5 data from critical infrastructure

Patch Information

The HDF Group has released HDF5 version 1.14.4 which addresses this vulnerability. Organizations should upgrade to this version or later to remediate CVE-2024-32608. The security fix is documented in the HDF Group CVE Issue Fixes announcement.

When planning the upgrade, consider that HDF5 may be embedded in various scientific computing applications, data analytics platforms, and custom software. A comprehensive inventory of all HDF5 deployments is essential for complete remediation.

Workarounds

• Implement strict input validation and sandboxing for HDF5 file processing operations
• Use application sandboxing technologies to limit the impact of potential exploitation
• Deploy memory protection mechanisms such as ASLR and DEP/NX to make exploitation more difficult
• Restrict network access to systems processing HDF5 files to reduce remote exploitation risk

# Check installed HDF5 version and upgrade on Debian/Ubuntu systems
dpkg -l | grep libhdf5
apt-get update && apt-get install --only-upgrade libhdf5-dev

# For systems using conda-managed HDF5
conda update hdf5

# Verify the installed version after upgrade
h5cc -showconfig | grep "HDF5 Version"