CVE-2024-29157

What it actually does

Heap buffer overflow in H5HG_read allows out-of-bounds write that corrupts the instruction pointer, enabling denial of service or arbitrary code execution.

Why it matters to the business

Applications that process untrusted HDF5 files can crash or be fully compromised, disrupting scientific data workflows and risking data theft or system takeover.

How an attack unfolds

An attacker supplies a specially crafted HDF5 file to any process that calls H5HG_read; the malformed global heap triggers the overflow, corrupting the instruction pointer and allowing shellcode execution or a crash.

How to fix it

Upgrade HDF5 to the latest patched release that resolves the H5HG_read overflow; rebuild and redeploy any dependent applications; apply compensating controls such as file-type sandboxing until patches are applied.

How to confirm the fix worked

Confirm the installed HDF5 version is newer than 1.14.3; run regression tests with known trigger files; monitor for crashes or unexpected instruction-pointer corruption in HDF5 processing paths.

Typical attack path

1. Attacker crafts malicious HDF5 file with oversized global heap data
2. Victim application or library opens the file and invokes H5HG_read
3. Heap overflow occurs, overwriting the instruction pointer
4. Attacker gains control of execution flow for code execution or denial of service

How to detect it

Review application logs for segmentation faults or heap-related crashes during HDF5 file ingestion; correlate with file-upload or processing timestamps; inspect core dumps for instruction-pointer corruption patterns in H5HG_read.

What your security team should do

• Immediately inventory all systems using HDF5 <= 1.14.3
• Prioritize patching of internet-facing or multi-tenant data-processing services
• Implement file-type restrictions and sandboxing for untrusted HDF5 input
• Add runtime monitoring for abnormal heap behavior in HDF5 consumers