In LibTIFF 4.0.9, there is a NULL pointer dereference in the TIFFWriteDirectorySec function in tif_dirwrite.c that will lead to a denial of service attack, as demonstrated by tiffset.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libtiff | Libtiff | 4.0.9 (including) | 4.0.9 (including) |
| Tiff | Ubuntu | bionic | * |
| Tiff | Ubuntu | cosmic | * |
| Tiff | Ubuntu | precise/esm | * |
| Tiff | Ubuntu | trusty | * |
| Tiff | Ubuntu | upstream | * |
| Tiff | Ubuntu | xenial | * |