CVE-2025-6120: assimp Buffer Overflow — Exploit

Description

A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future.

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CVSS v3.1 Score

5.3

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-119 Buffer Overflow

CWE-122 CWE-122

Affected Products

Vendor	Product	Versions
assimp	assimp	< 5.4.3

References

Exploits

https://github.com/assimp/assimp/issues/6220 https://github.com/user-attachments/files/20605340/read_meshes_reproduce.tar.gz

Other References

https://github.com/assimp/assimp/issues/6220#issuecomment-2945018579 https://vuldb.com/?ctiid.312589 https://vuldb.com/?id.312589 https://vuldb.com/?submit.591235

Frequently Asked Questions

What is CVE-2025-6120? +

A vulnerability classified as critical was found in Open Asset Import Library Assimp up to 5.4.3. Affected by this vulnerability is the function read_meshes in the library assimp/code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The project decided to collect all Fuzzer bugs in a main-issue to address them in the future. It has a CVSS v3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2025-6120? +

CVE-2025-6120 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-6120? +

CVE-2025-6120 affects products from assimp, specifically: assimp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6120? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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