FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. In affected versions a malicious server might trigger out of bound writes in a connected client. Connections using GDI or SurfaceCommands to send graphics updates to the client might send `0` width/height or out of bound rectangles to trigger out of bound writes. With `0` width or heigth the memory allocation will be `0` but the missing bounds checks allow writing to the pointer at this (not allocated) region. This issue has been patched in FreeRDP 2.4.1.
https://security.gentoo.org/glsa/202210-24
https://lists.debian.org/debian-lts-announce/2023/11/msg00010.html
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7c9r-6r2q-93qg