From blog.talosintelligence.com
Cisco Talos recently discovered several use-after-free vulnerabilities in Foxit Reader that could lead to arbitrary code execution.
The Foxit Reader is one of the most popular PDF document readers, which aims to have feature parity with Adobe’s Acrobat Reader. As a complete and feature-rich PDF reader, it supports JavaScript for interactive documents and dynamic forms. JavaScript support poses an additional attack surface.
Talos has identified four use-after-free vulnerabilities in Foxit Reader. The reader includes Javascript support to enable dynamic documents and multimedia content, which can be viewed interactively. A specially crafted PDF document can trigger the reuse of previously freed memory, which can lead to arbitrary code execution. An attacker needs to trick a user into opening a malicious file to trigger these vulnerabilities.