Ubuntu USN · USN-8476-1

xrdp vulnerabilities

Published: Thu, 25 Jun 2026 14:47

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

Summary

Several security issues were fixed in xrdp.

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 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)

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu bionic

xrdp→0.9.5-2ubuntu0.1~esm3apt_upgrade_esm
Fixed at 0.9.5-2ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp=0.9.5-2ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
xorgxrdp→0.9.5-2ubuntu0.1~esm3apt_upgrade_esm
Fixed at 0.9.5-2ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y xorgxrdp=0.9.5-2ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
xrdp→0.9.5-2ubuntu0.1~esm3apt_upgrade_esm
Fixed at 0.9.5-2ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp=0.9.5-2ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
xrdp-pulseaudio-installer→0.9.5-2ubuntu0.1~esm3apt_upgrade_esm
Fixed at 0.9.5-2ubuntu0.1~esm3 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp-pulseaudio-installer=0.9.5-2ubuntu0.1~esm3
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Ubuntu focal

xrdp→0.9.12-1ubuntu0.1+esm2apt_upgrade
Standard apt upgrade. Install 0.9.12-1ubuntu0.1+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
xrdp→0.9.12-1ubuntu0.1+esm2apt_upgrade
Standard apt upgrade. Install 0.9.12-1ubuntu0.1+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu jammy

xrdp→0.9.17-2ubuntu3+esm2apt_upgrade
Standard apt upgrade. Install 0.9.17-2ubuntu3+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
xrdp→0.9.17-2ubuntu3+esm2apt_upgrade
Standard apt upgrade. Install 0.9.17-2ubuntu3+esm2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

xrdp→0.9.24-4ubuntu0.1~esm1apt_upgrade_esm
Fixed at 0.9.24-4ubuntu0.1~esm1 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp=0.9.24-4ubuntu0.1~esm1
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.
xrdp→0.9.24-4ubuntu0.1~esm1apt_upgrade_esm
Fixed at 0.9.24-4ubuntu0.1~esm1 — ESM-only. Enable Ubuntu Pro (free for 5 personal machines) or treat as watch item.
```
sudo pro attach <token>
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp=0.9.24-4ubuntu0.1~esm1
```
Sign up at https://ubuntu.com/pro. Free for personal + small-team use.

Ubuntu questing

xrdp→0.10.1-3.1+deb13u1build0.25.10.1apt_upgrade
Standard apt upgrade. Install 0.10.1-3.1+deb13u1build0.25.10.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
xrdp→0.10.1-3.1+deb13u1build0.25.10.1apt_upgrade
Standard apt upgrade. Install 0.10.1-3.1+deb13u1build0.25.10.1 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y xrdp
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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