Open Asset Import Library Assimp 5.4.3 AC3D File ACLoader.cpp ConvertObjectSection tmp heap-based overflow

Summaryinfo

A vulnerability, which was classified as critical, has been found in Open Asset Import Library Assimp 5.4.3. Affected by this vulnerability is the function Assimp::AC3DImporter::ConvertObjectSection of the file code/AssetLib/AC/ACLoader.cpp of the component AC3D File Handler. Performing a manipulation of the argument tmp results in heap-based overflow. This vulnerability is identified as CVE-2025-2756. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

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 with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-2756. The exploitability is told to be easy. 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 and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 301260 (Amazon Linux 2 : qt5-qt3d, --advisory ALAS2-2026-3187 (ALAS-2026-3187)), which helps to determine the existence of the flaw in a target environment.

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 vulnerability database at Tenable (301260). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Software Library

Vendor

• Open Asset Import Library

Name

• Assimp

Version

• 5.4.3

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Submitinfo

Accepted

• Submit #517790: Open Asset Import Library Assimp >=5.4.3 Heap-based Buffer Overflow (by d3ng03)

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

Discussion