USN-8476-1: xrdp vulnerabilities

It was discovered that xrdp incorrectly handled bounds checking when
processing user domain information during the connection sequence. An
unauthenticated remote attacker could use this issue to cause xrdp to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2025-68670)

It was discovered that xrdp did not correctly enforce the maximum number of
login attempts configured by the MaxLoginRetry parameter. A remote attacker
could use this issue to perform an unlimited number of login attempts.
(CVE-2024-39917)

It was discovered that xrdp did not perform bounds checking when accessing
font glyphs. Since some of this data is controllable by the user, a remote
attacker could use this issue to cause xrdp to read out of bounds. This
issue only affected Ubuntu 24.04 LTS. (CVE-2023-42822)

It was discovered that xrdp did not properly handle session establishment
errors. A remote attacker could use this issue to bypass OS-level session
restrictions enforced by PAM, such as the maximum number of concurrent
sessions per user. This issue only affected Ubuntu 24.04 LTS.
(CVE-2023-40184)