3DO Company Heroes of Might and Magic III h3m Map File stack-based overflow

Summaryinfo

A vulnerability has been found in 3DO Company Heroes of Might and Magic III Complete 4.0.0.0/Demo 1.0.0.0/HD Mod 3.808 build 9 and classified as critical. This affects an unknown part of the component h3m Map File Handler. Performing a manipulation results in stack-based overflow. This vulnerability is known as CVE-2025-34124. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in 3DO Company Heroes of Might and Magic III Complete 4.0.0.0/Demo 1.0.0.0/HD Mod 3.808 build 9. It has been classified as critical. This affects an unknown part of the component h3m Map File Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A buffer overflow vulnerability exists in Heroes of Might and Magic III Complete 4.0.0.0, HD Mod 3.808 build 9, and Demo 1.0.0.0 via malicious .h3m map files that exploit object sprite name parsing logic. The vulnerability occurs during in-game map loading when a crafted object name causes a buffer overflow, potentially allowing arbitrary code execution. Exploitation requires the victim to open a malicious map file within the game.

The weakness was published by Pierre Lindblad and John Aakerblo. The advisory is shared at raw.githubusercontent.com. This vulnerability is uniquely identified as CVE-2025-34124 since 04/15/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (37716) and EUVD (EUVD-2025-21747). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• 3DO Company

Name

• Heroes of Might and Magic III

Version

• Complete 4.0.0.0
• Demo 1.0.0.0
• HD Mod 3.808 build 9

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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