In FreeRDP after 1.0 and before 2.0.0, there is an out-of-bound read in in update_read_bitmap_data that allows client memory to be read to an image buffer. The result displayed on screen as colour.
https://usn.ubuntu.com/4382-1/
https://usn.ubuntu.com/4379-1/
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
https://lists.debian.org/debian-lts-announce/2020/08/msg00054.html
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-3x39-248q-f4q6
https://github.com/FreeRDP/FreeRDP/issues/6005
https://github.com/FreeRDP/FreeRDP/commit/f8890a645c221823ac133dbf991f8a65ae50d637