Heap Buffer Overflow Vulnerability in Assimp Package
Summary
OSV-2026-74: Heap-buffer-overflow in ___interceptor_strtol. Affects assimp versions >= d8a9074cd0857dafb6e18d48b7185438f4bb398f, < 21607dfb756a1119a9607bf19cc2de5fba3e2d5f. Fixed in 21607dfb756a1119a9607bf19cc2de5fba3e2d5f. 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 developers with a unified interface to work with different file types, making it easier to integrate 3D assets into applications. However, like many libraries, Assimp is susceptible to vulnerabilities that can compromise its functionality and security. The recent heap buffer overflow vulnerability highlights a critical issue within the library's parsing capabilities, particularly when handling certain file formats.
Vulnerability Detail
The vulnerability identified is a heap buffer overflow occurring in the ___interceptor_strtol function, which is part of the Assimp library. This issue arises during the parsing of OBJ files, specifically within the ObjFileParser class. The overflow can lead to unauthorized memory access, potentially allowing an attacker to execute arbitrary code or crash the application. The vulnerability was reported through OSS-Fuzz, indicating its severity and the need for immediate attention.
How To Fix
Minimum fixed version
21607dfb756a1119a9607bf19cc2de5fba3e2d5f
This is the first release that contains the fix.
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Workaround
As a temporary measure, users can avoid processing untrusted or malformed OBJ files until the library is updated. This can help mitigate the risk of exploitation while waiting for a permanent fix.
Conclusion
The heap buffer overflow vulnerability in the Assimp package poses a serious risk to applications that utilize this library for 3D model parsing. It is essential for developers to update to the patched version to mitigate potential security threats. Utilizing tools like Vulert can further enhance security by providing real-time monitoring of open-source vulnerabilities.
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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, leading to memory corruption and potential security vulnerabilities.
You can use Vulert, which monitors open-source vulnerabilities in your software. By simply uploading your manifest file like package-lock.json, you can receive real-time alerts. You can also check your application using the Vulert playground at Vulert Scanner.
If exploited, this vulnerability could allow an attacker to execute arbitrary code, crash the application, or compromise sensitive data, leading to severe security breaches.
Yes, using older versions of Assimp that are vulnerable to this issue poses a significant risk. It is crucial to update to the latest patched version to ensure security.
You can find detailed information about Assimp and its vulnerabilities on its official GitHub repository and through security advisories such as OSS-Fuzz.
References
Related vulnerabilities
Recent vulnerabilities recorded for assimp.
