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A buffer overflow vulnerability exists in the Microsoft W3Who ISAPI extension (w3who.dll), where a remote attacker can send a specially crafted long query string to trigger a buffer overflow. This may result in a denial of service or potentially allow the execution of arbitrary code in the context of the IIS process.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit exploit module targeting a stack buffer overflow vulnerability in the Microsoft IIS ISAPI extension w3who.dll (CVE-2004-1134). The exploit is weaponized and allows remote code execution on Windows 2000 and Windows XP (SP2) systems where the vulnerable DLL is accessible, typically at /scripts/w3who.dll. The module uses the Metasploit framework's HttpClient to send a specially crafted HTTP request with an overlong query string, triggering the overflow and executing a customizable payload (such as a reverse shell). The module includes automatic target detection based on server responses and supports multiple return addresses for different Windows versions. The only fingerprintable endpoint is the default ISAPI DLL path. The code is well-structured, leverages Metasploit's payload system, and is suitable for both proof-of-concept and operational exploitation.
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