CVE-2020-4044

The xrdp-sesman service before version 0.9.13.1 can be crashed by
connecting over port 3350 and supplying a malicious payload. Once the
xrdp-sesman process is dead, an unprivileged attacker on the server could
then proceed to start their own imposter sesman service listening on port
3350. This will allow them to capture any user credentials that are
submitted to XRDP and approve or reject arbitrary login credentials. For
xorgxrdp sessions in particular, this allows an unauthorized user to hijack
an existing session. This is a buffer overflow attack, so there may be a
risk of arbitrary code execution as well.