A Use After Free vulnerability exists in Artifex Software, Inc. MuPDF library 1.17.0-rc1 and earlier when a valid page was followed by a page with invalid pixmap dimensions, causing bander - a static - to point to previously freed memory instead of a newband_writer.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mupdf | Artifex | * | 1.16.1 (including) |
| Mupdf | Artifex | 1.17.0-rc1 (including) | 1.17.0-rc1 (including) |
| Mupdf | Ubuntu | bionic | * |
| Mupdf | Ubuntu | focal | * |
| Mupdf | Ubuntu | groovy | * |
| Mupdf | Ubuntu | trusty | * |
| Mupdf | Ubuntu | upstream | * |
| Mupdf | Ubuntu | xenial | * |