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CVE-2025-34124 is a buffer overflow vulnerability in Heroes of Might and Magic III Complete 4.0.0.0, HD Mod 3.808 build 9, and Demo 1.0.0.0. The flaw is triggered by a malicious .h3m map file that abuses object sprite name parsing logic during in-game map loading. When the game processes a crafted object name from the map, it can write beyond the bounds of an internal buffer, leading to memory corruption. Successful exploitation may allow arbitrary code execution in the context of the user running the game.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module (modules/exploits/windows/fileformat/homm3_h3m.rb) that exploits a buffer overflow vulnerability (CVE-2025-34124) in Heroes of Might and Magic III (various Windows versions). The exploit works by generating a specially crafted .h3m map file. When a victim opens this file in the vulnerable game, a buffer overflow occurs during the loading of object sprite names, allowing for arbitrary code execution. The module supports multiple game versions, each with specific return addresses and anti-crash gadgets to ensure reliable exploitation. The payload is customizable via Metasploit and is embedded in the malicious map file. The attack vector is local, requiring the victim to open the crafted file. No network endpoints are involved; the main fingerprintable artifact is the .h3m file itself. The code is mature and operational, providing a working exploit with customizable payloads for penetration testing or demonstration purposes.
3 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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Cross-references every affected SKU, including bundled OEM variants.
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