CVE-2024-56827

What it actually does

A heap buffer overflow is triggered in the opj_decompress utility under specific command-line options, potentially causing the application to crash or exhibit undefined behavior.

Why it matters to the business

Organizations relying on OpenJPEG for image decompression may experience application instability or crashes when using the opj_decompress tool with certain options, disrupting image processing operations.

How an attack unfolds

An attacker with local access crafts input or options for opj_decompress that triggers the heap buffer overflow, leading to a crash or potential code execution depending on memory layout.

How to fix it

Upgrade uclouvain/openjpeg to commit e492644fbded4c820ca55b5e50e598d346e850e8 or later. For affected Chromium on Ubuntu 14.04, update to version 58.0.3029.81-0ubuntu0.14.04.1172 or equivalent.

How to confirm the fix worked

Verify the installed version of OpenJPEG matches or exceeds the fixed commit. Test opj_decompress with previously triggering options to confirm no crash.

Typical attack path

1. Identify vulnerable OpenJPEG installation
2. Craft malicious command line options for opj_decompress
3. Execute the utility to trigger overflow
4. Observe crash or undefined behavior

How to detect it

Examine logs for crashes in opj_decompress or OpenJPEG processes. Look for unusual command line arguments in process execution logs.

What your security team should do

• Prioritize updating OpenJPEG in all environments using the opj_decompress utility
• Review usage of opj_decompress in scripts and applications
• Monitor for application crashes related to image processing