Use tools to track file descriptor usage and set limits at the OS level to prevent a single process from crashing your entire server.
The vulnerability wasn't actually in the RAR format, but in how certain environments handled networking protocols. Specifically: 22883.rar
While modern versions of Node.js (14.16.0+, 12.21.0+, and 10.24.0+) have long since patched this, 22883.rar remains a common sight in: Use tools to track file descriptor usage and
The 22883.rar file is frequently used in security research and proof-of-concept (PoC) demonstrations to illustrate how a crafted RAR archive can interact with vulnerable systems. While the RAR format itself is a standard proprietary compression tool, this specific identifier points back to a massive Node.js security update in 2021. The Core Vulnerability: CVE-2021-22883 22883.rar