| Title | Assimp commit 17c12da Heap-based Buffer Overflow |
|---|
| Description | A heap-based buffer over-read vulnerability exists in Assimp's Half-Life 1 MDL loader within the `HL1MDLLoader::extract_anim_value` function at `HL1MDLLoader.cpp:1332`. The flaw is caused by missing validation for the `num.total` field. When parsing a malicious MDL file where `num.total` is set to zero, the while loop condition becomes permanently true, resulting in an infinite loop. Inside the loop, the data pointer is continuously incremented without any boundary checks, eventually reading beyond the limits of the allocated heap buffer. This out-of-bounds memory access triggers an immediate program crash. Remote attackers can exploit this vulnerability to cause a denial-of-service (DoS) condition. |
|---|
| Source | ⚠️ https://github.com/assimp/assimp/issues/6616 |
|---|
| User | TYGLS (UID 94774) |
|---|
| Submission | 05/07/2026 04:54 (3 months ago) |
|---|
| Moderation | 05/31/2026 10:11 (24 days later) |
|---|
| Status | Accepted |
|---|
| VulDB entry | 367510 [Assimp up to 6.0.4 Half-Life 1 MDL Loader HL1MDLLoader.cpp extract_anim_value num.total heap-based overflow] |
|---|
| Points | 20 |
|---|