CVE-2025-2756
Published: 25 March 2025
Summary
CVE-2025-2756 is a medium-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Assimp Assimp. Its CVSS base score is 5.3 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Client Execution (T1203); ranked at the 30.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Deeper analysis
CVE-2025-2756 is a heap-based buffer overflow vulnerability in the Open Asset Import Library (Assimp) version 5.4.3. It affects the Assimp::AC3DImporter::ConvertObjectSection function within the file code/AssetLib/AC/ACLoader.cpp, specifically in the AC3D File Handler component. The issue arises from manipulation of the 'tmp' argument, as classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-122 (Heap-based Buffer Overflow). The vulnerability received a CVSS v3.1 base score of 6.3 (AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L) and was published on 2025-03-25.
The vulnerability can be exploited remotely by an unauthenticated attacker with no privileges, requiring user interaction such as opening a maliciously crafted AC3D file. Successful exploitation leads to limited impacts on confidentiality, integrity, and availability, potentially allowing arbitrary code execution or denial of service via the buffer overflow.
Advisories and discussions are available in referenced sources, including GitHub issues #6018 and #6018#issue-2877375815, as well as VulDB entries at ctiid.300861, id.300861, and submit.517790. The exploit has been publicly disclosed and may be used.
Notable context includes the public disclosure of the exploit, enabling potential widespread use against applications relying on Assimp for 3D asset parsing.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-8077
Vulnerability details
A vulnerability classified as critical has been found in Open Asset Import Library Assimp 5.4.3. This affects the function Assimp::AC3DImporter::ConvertObjectSection of the file code/AssetLib/AC/ACLoader.cpp of the component AC3D File Handler. The manipulation of the argument tmp leads to heap-based buffer…
more
overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap-based buffer overflow in Assimp AC3D file parser enables remote code execution via malicious file processed by vulnerable applications, facilitating Exploitation for Client Execution.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly remediates the heap-based buffer overflow by requiring timely patching or upgrading of the vulnerable Assimp library version 5.4.3.
Implements memory protections such as ASLR, DEP/NX, and stack canaries that prevent or hinder exploitation of the heap buffer overflow in Assimp's AC3D importer.
Requires validation of AC3D file inputs to restrict malformed data that triggers the buffer overflow in Assimp::AC3DImporter::ConvertObjectSection.