CVE-2014-9093

What it actually does

Invalid write operation during RTF file parsing in LibreOffice allows memory corruption that can lead to application crash or arbitrary code execution.

Why it matters to the business

Users opening crafted RTF documents risk system crashes that interrupt productivity and potential compromise of affected workstations, especially in environments still running versions prior to 4.3.5.

How an attack unfolds

An attacker creates a specially malformed RTF file and delivers it through email or a download link; when the recipient opens the file in a vulnerable LibreOffice version the parser performs an invalid memory write that may crash the application or allow code execution.

How to fix it

Upgrade LibreOffice to version 4.3.5 or newer on all affected systems; apply vendor updates for Fedora, Ubuntu, and Debian packages as they become available.

How to confirm the fix worked

Verify installed LibreOffice version is 4.3.5 or later; attempt to open known-good RTF files and confirm no crashes occur; review package manager output for successful upgrade.

Typical attack path

1. Craft a malicious RTF file containing malformed control structures
2. Distribute the file via email attachment or web download
3. Victim opens the document using an affected LibreOffice release
4. Parser triggers invalid write leading to crash or code execution

How to detect it

Search application and system logs for LibreOffice crashes or segmentation faults immediately following RTF file access; review recent file-open events for suspicious RTF documents.

What your security team should do

• Prioritize patching LibreOffice installations to 4.3.5+ across the environment
• Configure application allow-listing or sandboxing for document viewers
• Educate users to avoid opening RTF files from untrusted sources
• Monitor for new package updates in Fedora, Ubuntu, and Debian repositories