A xrdp security update has been released for Debian GNU/Linux 10 to address a denial of service issue.

DSA 4737-1: xrdp security update

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Debian Security Advisory DSA-4737-1 security@debian.org
  https://www.debian.org/security/ Salvatore Bonaccorso
July 29, 2020   https://www.debian.org/security/faq
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Package : xrdp
CVE ID : CVE-2020-4044
Debian Bug : 964573

Ashley Newson discovered that the XRDP sessions manager was susceptible
to denial of service. A local attacker can further take advantage of
this flaw to impersonate the XRDP sessions manager and capture any user
credentials that are submitted to XRDP, approve or reject arbitrary
login credentials or to hijack existing sessions for xorgxrdp sessions.

For the stable distribution (buster), this problem has been fixed in
version 0.9.9-1+deb10u1.

We recommend that you upgrade your xrdp packages.

For the detailed security status of xrdp please refer to its security
tracker page at:
  https://security-tracker.debian.org/tracker/xrdp

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/