| 제목 | Open Asset Import Library Assimp 6.0.2 / master commit 0581ed5 Heap-based Buffer Overflow |
|---|
| 설명 | The crash occurs in Q3DImporter::InternReadFile() while allocating texture data:
unsigned int mul = tex->mWidth * tex->mHeight;
aiTexel *begin = tex->pcData = new aiTexel[mul];
aiTexel *const end = &begin[mul - 1] + 1;
for (; begin != end; ++begin) {
begin->r = stream.GetI1();
begin->g = stream.GetI1();
begin->b = stream.GetI1();
begin->a = 0xff;
}
When the file provides extremely large mWidth and mHeight, their product overflows the unsigned int range, causing mul to wrap around to a small number (observed as 0 during GDB debugging). Immediately afterward, the code calculates end = &begin[mul - 1] + 1, which underflows mul - 1 and creates an invalid pointer far beyond the allocated buffer. The subsequent loop then writes out of bounds, triggering a heap-buffer-overflow. Proper bounds checking and using 64-bit arithmetic before multiplication would prevent this vulnerability. |
|---|
| 원천 | ⚠️ https://github.com/assimp/assimp/issues/6358 |
|---|
| 사용자 | sand (UID 90194) |
|---|
| 제출 | 2025. 09. 19. AM 10:10 (7 개월 ago) |
|---|
| 모더레이션 | 2025. 10. 04. AM 08:08 (15 days later) |
|---|
| 상태 | 수락 |
|---|
| VulDB 항목 | 327011 [Open Asset Import Library Assimp 6.0.2 Q3DLoader.cpp InternReadFile 메모리 손상] |
|---|
| 포인트들 | 20 |
|---|