CVE-2016-10506

What it actually does

Remote attackers can trigger a division-by-zero error in the OpenJPEG library's pi.c functions (opj_pi_next_cprl, opj_pi_next_pcrl, opj_pi_next_rpcl) by supplying specially crafted JPEG2000 (J2K) files, resulting in an application crash.

Why it matters to the business

Applications relying on OpenJPEG for image processing may experience unexpected crashes when handling malicious image files, leading to service interruptions and potential data loss in workflows dependent on image decoding.

How an attack unfolds

An attacker crafts a malformed J2K file that causes division by zero in the progression order iteration functions and delivers it to a vulnerable application that processes the file using OpenJPEG.

How to fix it

Upgrade uclouvain/openjpeg to commit d27ccf01c68a31ad62b33d2dc1ba2bb1eeaafe7b or later, and ensure Bitnami WordPress Multisite is updated to version 3.7.33 or newer which includes the fix.

How to confirm the fix worked

Verify the installed OpenJPEG version is 2.2.0 or later, and test image processing with known malformed J2K samples in a controlled environment.

Typical attack path

1. Craft a malicious J2K file exploiting the division-by-zero conditions
2. Deliver the file to the target application via network or file upload
3. Trigger processing of the file in OpenJPEG
4. Cause application crash and denial of service

How to detect it

Look for application crash logs indicating division by zero or faults in OpenJPEG pi.c functions when processing J2K files.

What your security team should do

• Prioritize updating OpenJPEG in all affected systems to the listed fixed versions
• Review and restrict processing of untrusted J2K files until patched
• Monitor for application crashes related to image decoding