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A stack-based buffer overflow exists in mIRC version 6.34, where the application fails to properly handle overly long hostnames in PRIVMSG messages. This flaw allows remote attackers to overwrite stack memory and potentially execute arbitrary code when a specially crafted PRIVMSG message is processed.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (2 hidden).
This repository contains a single Metasploit module: 'mIRC PRIVMSG Handling Stack Buffer Overflow' (modules/exploits/windows/misc/mirc_privmsg_server.rb). The module exploits a stack buffer overflow vulnerability in mIRC IRC Client v6.34 and earlier (CVE-2008-4449). It works by running a malicious IRC server that, when connected to by a vulnerable mIRC client, sends a specially crafted PRIVMSG command to trigger the overflow and execute arbitrary code. The exploit is configurable for the listening port (default 6667) and server name, and supports custom Metasploit payloads up to 160 bytes, with several bad characters filtered. The main attack vector is network-based, requiring the victim to connect to the attacker's IRC server. The exploit targets Windows XP SP3 and is operational, providing code execution on the victim's system. The repository is structured as a single Ruby file compatible with the Metasploit framework.
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