| 标题 | Assimp commit 17c12da Heap-based Buffer Overflow |
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| 描述 | A heap-buffer-overflow vulnerability exists in Assimp's 3DGS MDL7 model parser within the Assimp::MDLImporter::ReadFaces_3DGS_MDL7() function at MDLLoader.cpp:1066. The flaw stems from missing buffer boundary validation when accessing vertex data via the `_AI_MDL7_ACCESS_VERT` macro. The macro calculates vertex memory addresses using user-controlled index offsets and fixed internal offsets without verifying that the resulting address lies within the bounds of the allocated file buffer. A maliciously crafted MDL7 file with invalid vertex count or truncated metadata can trigger out-of-bounds memory access, allowing the parser to read 4 bytes of heap memory beyond the valid buffer region. This vulnerability causes memory corruption and application crashes, and remote attackers can exploit this issue via a specially crafted MDL file to induce a denial-of-service (DoS) condition. |
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| 来源 | ⚠️ https://github.com/assimp/assimp/issues/6630 |
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| 用户 | TYGLS (UID 94774) |
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| 提交 | 2026-06-29 14時45分 (3 月前) |
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| 管理 | 2026-08-16 09時50分 (2 months later) |
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| 状态 | 已接受 |
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| VulDB条目 | 391145 [Open Asset Import Library Assimp 17c12da 3DGS MDL7 Model Parser LWOLoader.h ReadFaces_3DGS_MDL7 内存损坏] |
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| 积分 | 20 |
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