| Title | Assimp commit 17c12da Buffer Overflow |
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| Description | A global-buffer-overflow vulnerability exists in Assimp's Half-Life 1 MDL loader within the `HL1MDLLoader::read_sequence_infos()` function at `HL1MDLLoader.cpp:1120`. The flaw is caused by insufficient input length validation when parsing bone names from a malformed MDL file. The parser reads an extremely long bone name into a fixed-size `aiString` buffer without boundary checks, fully populating the internal buffer. During the `aiString` copy operation, a 1023-byte `memcpy` triggers an out-of-bounds read accessing memory in the global data section, leading to an immediate program crash. Remote attackers can exploit this vulnerability via a crafted MDL file to cause a denial-of-service (DoS) condition. |
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| Source | ⚠️ https://github.com/assimp/assimp/issues/6619 |
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| User | TYGLS (UID 94774) |
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| Submission | 05/07/2026 05:07 (3 months ago) |
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| Moderation | 05/31/2026 10:11 (24 days later) |
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| Status | Accepted |
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| VulDB entry | 367512 [Assimp up to 6.0.4 Half-Life 1 MDL Loader HL1MDLLoader.cpp read_sequence_infos aiString out-of-bounds] |
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| Points | 20 |
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