CVE-2023-35989

What it actually does

An integer overflow in LXT2 zlib block allocation allows a crafted file to trigger memory corruption and arbitrary code execution.

Why it matters to the business

Attackers can gain full control of systems used to view waveform files, enabling data theft or further network compromise when users open malicious files.

How an attack unfolds

An attacker crafts a malicious .lxt2 file that triggers the integer overflow during zlib block handling. The victim opens the file in the affected application, causing the overflow to corrupt memory and execute attacker-controlled code.

How to fix it

Apply the latest application version addressing the issue when released; otherwise restrict opening of untrusted .lxt2 files and consider sandboxed execution environments.

How to confirm the fix worked

Test by opening known-good versus crafted .lxt2 files in an isolated environment and verify process behavior or memory state; confirm application version and patch level.

Typical attack path

1. Craft .lxt2 file exploiting integer overflow in zlib allocation
2. Deliver file via email, download, or shared storage
3. Victim opens file in vulnerable application
4. Overflow leads to memory corruption and code execution

How to detect it

Review logs for unexpected process launches or crashes immediately after .lxt2 file access; inspect recent file-open events for suspicious .lxt2 files.

What your security team should do

• Block or sandbox opening of .lxt2 files from untrusted sources
• Monitor vendor releases for fixed versions and deploy promptly
• Educate users on risks of opening waveform files from unknown origins