Exploit Linux VIM Configuration Backdoor and Mitigation : Strategies to run scripts via a VIM backdoor and mitigation techniques

The Vim text editor, due to its significant scripting capabilities (Vimscript) and legitimate features like modeline and autocmd, presents a unique attack surface often overlooked by traditional security audits. This paper explores three (3) novel, remarkably obfuscated techniques for leveraging these features to achieve persistent code execution, effectively forming a "Vim backdoor." The strategies include Modelines & Recursive Source Injection (M-RSI), Time-Delayed Autocommands (T-DAC), and Encrypted/Encoded Payload through Register (EP-R). We for-malize the threat using a quantifiable likelihood model, Pme, and present a comparative analysis of the exploitation methods based on stealth and persistence. Lastly, we propose a multifaceted defense architecture that integrates static analysis, strict execution sandboxing using technologies such as seccomp, and policy-based restriction of core Vimscript functions to mitigate zero-click vulnerabilities efficiently.