Ubuntu 25.10 xrdp Critical DoS Arbitrary Code Vuln USN-8476

Several security issues were fixed in xrdp. Software Description: - xrdp: an open source RDP server Details: 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 e... Read the Full Advisory

Several security issues were fixed in xrdp.

Software Description:

- xrdp: an open source RDP server

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.

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 e...

The problem can be corrected by updating your system to the following package versions: Ubuntu 25.10 xrdp 0.10.1-3.1+deb13u1build0.25.10.1 Ubuntu 24.04 LTS xrdp 0.9.24-4ubuntu0.1~esm1 Available with Ubuntu Pro Ubuntu 22.04 LTS xrdp 0.9.17-2ubuntu3+esm2 Available with Ubuntu Pro Ubuntu 20.04 LTS xrdp 0.9.12-1ubuntu0.1+esm2 Available with Ubuntu Pro Ubuntu 18.04 LTS xorgxrdp 0.9.5-2ubuntu0.1~esm3 Available with Ubuntu Pro xrdp 0.9.5-2ubuntu0.1~esm3 Available with Ubuntu Pro xrdp-pulseaudio-installer 0.9.5-2ubuntu0.1~esm3 Available with Ubuntu Pro After a standard system update you need to restart xrdp to make all the necessary changes.

CVE-2023-40184, CVE-2023-42822, CVE-2024-39917, CVE-2025-68670

Ubuntu Security Notice USN-8476-1

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