Heap Buffer Overflow Vulnerability in Assimp Package
Summary
OSV-2026-1041: Heap-buffer-overflow in Assimp::ObjExporter::indexMap. Affects assimp versions >= 16c50d7b53b5b6536599135004fb003c5e6f88b8. No fix is published. How to fix ↓
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Background
Assimp (Open Asset Import Library) is a powerful library designed for importing and exporting various 3D model formats. It provides a unified interface for developers to work with 3D assets, making it easier to integrate complex models into applications. However, like many libraries, Assimp is susceptible to vulnerabilities that can compromise the integrity and security of applications that rely on it.
Vulnerability Detail
The vulnerability identified is a heap-buffer-overflow occurring in the Assimp::ObjExporter::indexMap function. This issue arises when the function attempts to write beyond the allocated memory buffer, leading to potential crashes or exploitation. The vulnerability was reported through OSS-Fuzz, indicating a significant risk, particularly in scenarios where untrusted 3D model files are processed. The crash state reveals that the overflow can occur during the geometry file writing process, which could allow attackers to manipulate memory and execute arbitrary code.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a temporary workaround, avoid processing untrusted or potentially malicious 3D model files until the package is updated. Additionally, implement input validation to ensure that only safe and verified files are processed by the Assimp library.
Conclusion
The heap buffer overflow vulnerability in the Assimp package poses significant risks to applications that utilize this library for 3D model processing. It is crucial for developers to update to the latest patched version and implement workarounds to mitigate potential exploitation. Utilizing tools like Vulert can help monitor and alert for such vulnerabilities in real-time.
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FAQ
A heap buffer overflow occurs when a program writes more data to a buffer located on the heap than it can hold, which can lead to data corruption, crashes, or security vulnerabilities.
You can use Vulert, which monitors open-source vulnerabilities in your software. By uploading your manifest file, such as package-lock.json, you can check for vulnerabilities in real-time.
Exploiting this vulnerability can lead to application crashes, data corruption, or even remote code execution, allowing attackers to take control of the affected system.
Yes, it is important to check the official Assimp repository for the latest version that includes a patch for this vulnerability.
If an immediate update is not possible, implement strict input validation and avoid processing untrusted 3D model files until the vulnerability is resolved.
References
Related vulnerabilities
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