CVE-2024-29166

What it actually does

Buffer overflow in H5O__linfo_decode corrupts the instruction pointer, enabling denial of service or potential arbitrary code execution.

Why it matters to the business

Applications relying on the affected postgresql packages on Alpine may experience service disruption or full system compromise when handling untrusted data files; although not listed in KEV and with stable low EPSS, the widespread use of postgresql increases exposure for dependent workloads.

How an attack unfolds

An attacker crafts a malicious HDF5 file that triggers the buffer overflow during decoding in H5O__linfo_decode, allowing control of the instruction pointer to execute arbitrary code or crash the process; no named threat actors are associated with this issue.

How to fix it

Upgrade postgresql on Alpine v3.13 to version 13.11-r0 which resolves the embedded HDF5 buffer overflow.

How to confirm the fix worked

Confirm postgresql package version is 13.11-r0 or newer via package manager and test HDF5 file processing under controlled conditions to verify stability.

Typical attack path

1. Craft a malformed HDF5 file to trigger the buffer overflow in H5O__linfo_decode
2. Deliver the file to a vulnerable application that processes HDF5 data
3. Induce the target to decode the file
4. Overwrite the instruction pointer to achieve code execution or denial of service

How to detect it

Examine application and system logs for crashes or segmentation faults during HDF5 file processing and watch for unexpected process behavior or privilege escalation attempts following file ingestion.

What your security team should do

• Apply the postgresql 13.11-r0 update immediately across Alpine environments
• Inventory applications that depend on HDF5 or postgresql for data handling
• Implement input validation and sandboxing for untrusted data files until patches are deployed