Description (CNA)
A heap out-of-bounds write exists in the Photo CD (PCD) decoder of GraphicsMagick. In DecodeImage() (coders/pcd.c), the Huffman delta loop advances its output pointer with q++ after every decoded delta and never checks it against the end of the heap-allocated luma/chroma plane buffers. The pointer is repositioned only when a sync marker introduces a new plane/row; between sync markers the run length is bounded solely by the input. A crafted PCD file that positions the pointer near the end of a plane and then supplies a long run of deltas with no intervening sync therefore walks the pointer past the end of the allocation and writes through it. Processing an untrusted PCD file — for example with gm convert or gm identify, or through any application linked against libGraphicsMagick — can corrupt heap memory beyond the buffers.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| GraphicsMagick Group / GraphicsMagick | affected 1.0.0 before 1.3.48 |
| Debian / graphicsmagick | affected 0 before 1.4+really1.3.48-1 |
| Fedora Project / GraphicsMagick | affected 0 before 1.3.48 |
CWE
CWE-787
References
- https://foss.heptapod.net/graphicsmagick/graphicsmagick/-/commit/937cdd9920bd96
- https://foss.heptapod.net/graphicsmagick/graphicsmagick/-/raw/GraphicsMagick-1_3_48/ChangeLog
ADP enrichment
No English description supplied.
No references supplied.