CVE-2024-32619

What it actually does

Heap-based buffer overflow in H5T_copy_reopen allows corruption of the instruction pointer, enabling potential arbitrary code execution with the privileges of the affected process.

Why it matters to the business

Systems processing untrusted HDF5 files risk local code execution that could lead to data theft, tampering, or full host compromise; prevalence of the library in scientific and data-intensive workflows increases exposure surface.

How an attack unfolds

An attacker supplies a specially crafted HDF5 file or in-memory structure that triggers H5T_copy_reopen with oversized type information, overflowing the heap buffer and overwriting the instruction pointer to redirect execution to attacker-controlled code.

How to fix it

Upgrade hdfgroup/hdf5 to commit 88429b015e29c59de604b0f552001fb7cb7ed5d0 or later; rebuild and redeploy all dependent applications; verify the updated library is loaded at runtime.

How to confirm the fix worked

Confirm the running library reports a version containing commit 88429b015e29c59de604b0f552001fb7cb7ed5d0; re-execute any available regression tests covering type copying; monitor for absence of crashes on previously triggering inputs.

Typical attack path

1. Identify an application or workflow that opens attacker-controlled HDF5 files using the vulnerable library
2. Craft a malicious HDF5 dataset containing oversized type descriptors that reach H5T_copy_reopen
3. Trigger file or data processing to cause the heap overflow and instruction-pointer corruption
4. Achieve arbitrary code execution within the process context

How to detect it

Review process crash logs and core dumps for heap corruption near H5T_copy_reopen; inspect application logs for unexpected HDF5 type-handling failures; correlate with file-open events on untrusted HDF5 inputs.

What your security team should do

• Immediately inventory all deployments using hdfgroup/hdf5 and schedule upgrade to the fixed commit
• Apply compensating controls such as sandboxing or file-type validation until patches are deployed
• Add the fixed commit hash to dependency scanners and block builds against older revisions