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In ZNC before 1.9.1, remote code execution can occur in the modtcl module via a crafted IRC KICK message/event.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a HexChat plugin (modtcl-xp.py) designed to exploit CVE-2024-39844, a remote code execution vulnerability in the ZNC IRC bouncer's modtcl module (versions prior to 1.9.1). The exploit is implemented as a Python script that registers a custom '/exploit' command in HexChat. When invoked, it sends a specially crafted IRC KICK command to a specified user, injecting a Tcl 'exec' command that is executed on the ZNC server if it is running the vulnerable modtcl module. The repository consists of a README.md describing the exploit and the main exploit script. The attack vector is network-based, requiring IRC access to the vulnerable ZNC instance. No hardcoded IPs, domains, or URLs are present; the exploit targets any reachable ZNC server with the vulnerable configuration.
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