| 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 bone transformation key parser within the Assimp::MDLImporter::ParseBoneTrafoKeys_3DGS_MDL7() function atMDLLoader.cpp:1691. The flaw is caused by missing buffer boundary validation when iterating over bone transformation data. The function relies on the untrusted `transmatrix_count` value read directly from the MDL7 file to control loop iterations, and increments the `pcBoneTransforms` pointer by a fixed structure size in each cycle without checking whether the pointer stays within the valid bounds of the allocated file buffer. A maliciously crafted or truncated MDL7 file can force the pointer beyond the valid frame data region, triggering an out-of-bounds 2-byte heap memory read. This vulnerability results in memory corruption and application crash, and remote attackers can exploit this issue via a specially crafted MDL model file to conduct denial-of-service (DoS) attacks. |
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| 来源 | ⚠️ https://github.com/assimp/assimp/issues/6633 |
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| 用户 | TYGLS (UID 94774) |
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| 提交 | 2026-06-29 14時49分 (3 月前) |
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| 管理 | 2026-08-16 20時12分 (2 months later) |
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| 状态 | 已接受 |
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| VulDB条目 | 391200 [Open Asset Import Library Assimp 17c12da 3DGS MDL7 Bone Transformation Key Parser MDLLoader.cpp ParseBoneTrafoKeys_3DGS_MDL7 transmatrix_count/pcBoneTransforms 内存损坏] |
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| 积分 | 20 |
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