CVE-2014-9029

What it actually does

Off-by-one errors in the jpc_dec_cp_setfromcox and jpc_dec_cp_setfromrgn functions within JasPer's jpc/jpc_dec.c cause heap-based buffer overflows when decoding crafted JP2 files, enabling remote arbitrary code execution.

Why it matters to the business

Systems processing untrusted JP2 images risk full compromise allowing attackers to run malicious code, steal data, or pivot within networks; urgency is low due to the vulnerability's age and lack of active exploitation campaigns.

How an attack unfolds

An attacker creates a specially crafted JP2 file that triggers the off-by-one errors during decoding, then delivers the file via web page, email attachment, or other means; when the victim opens it using vulnerable software relying on JasPer, the overflow occurs and arbitrary code executes.

How to fix it

Update affected packages to fixed versions such as flashplugin-nonfree 11.2.202.554ubuntu0.14.04.1 on Ubuntu 14.04 LTS; generally upgrade JasPer beyond 1.900.1 and rebuild dependent applications.

How to confirm the fix worked

Confirm installed package versions match or exceed the listed fixes, scan for vulnerable JasPer library versions in binaries, and test JP2 handling with benign files after patching.

Typical attack path

1. Create malicious JP2 file exploiting off-by-one errors in jpc_dec functions
2. Deliver file to target via web, email, or shared storage
3. Victim application processes the file using vulnerable JasPer library
4. Heap buffer overflow is triggered during decoding
5. Arbitrary code execution is achieved

How to detect it

Review application and system logs for crashes or unusual behavior in processes handling JP2 files, monitor for unexpected code execution following image processing, and search historical access logs for suspicious JP2 file deliveries.

What your security team should do

• Apply listed package updates to all affected systems without delay
• Restrict or disable processing of untrusted JP2 files where possible
• Inventory and replace any remaining legacy JasPer dependencies