xrdp: xrdp is an open source remote desktop protocol (RDP) server
CVE-2023-40184 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2023-40184, released August 30, 2023. It is not reported as exploited. Patch Radar priority: Routine.
xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| xorgxrdp · Ubuntu 18.04.6 LTS (bionic) | 0.9.5-2ubuntu0.1~esm2 | xorgxrdp 0.9.5-2ubuntu0.1~esm2 | Sep 27, 2023 |
| xrdp · Debian 11.6 (bullseye) | 0.9.21.1-1~deb11u2 | DLA-4166-1 | May 16, 2025 |
| xrdp · Debian 12.15 (bookworm) | 0.9.21.1-1+deb12u1 | DEBIAN-CVE-2023-40184 | Aug 30, 2023 |
| xrdp · Debian 13.5 (trixie) | 0.9.24-2 | DEBIAN-CVE-2023-40184 | Aug 30, 2023 |
| xrdp · Debian 14 | 0.9.24-2 | DEBIAN-CVE-2023-40184 | Aug 30, 2023 |
| xrdp · Ubuntu 18.04.6 LTS (bionic) | 0.9.5-2ubuntu0.1~esm2 | xrdp 0.9.5-2ubuntu0.1~esm2 | Sep 27, 2023 |
| xrdp · Ubuntu 20.04 LTS (focal) | 0.9.12-1ubuntu0.1+esm1 | xrdp 0.9.12-1ubuntu0.1+esm1 | Sep 27, 2023 |
| xrdp · Ubuntu 22.04.1 LTS (jammy) | 0.9.17-2ubuntu2+esm1 | xrdp 0.9.17-2ubuntu2+esm1 | Sep 27, 2023 |
| xrdp · Ubuntu 24.04.5 LTS (noble) | 0.9.24-4ubuntu0.1~esm1 | xrdp 0.9.24-4ubuntu0.1~esm1 | Jan 27, 2026 |
| xrdp-pulseaudio-installer · Ubuntu 18.04.6 LTS (bionic) | 0.9.5-2ubuntu0.1~esm2 | xrdp-pulseaudio-installer 0.9.5-2ubuntu0.1~esm2 | Sep 27, 2023 |
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