| Name | CVE-2023-40184 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1051061 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| xrdp (PTS) | buster | 0.9.9-1+deb10u1 | vulnerable |
| buster (security) | 0.9.9-1+deb10u3 | vulnerable |
| bullseye (security), bullseye | 0.9.21.1-1~deb11u1 | vulnerable |
| bookworm | 0.9.21.1-1 | vulnerable |
| sid, trixie | 0.9.24-5 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| xrdp | source | experimental | 0.9.24-1 | | | |
| xrdp | source | (unstable) | 0.9.24-2 | | | 1051061 |
Notes
[bookworm] - xrdp <no-dsa> (Minor issue)
[bullseye] - xrdp <no-dsa> (Minor issue)
[buster] - xrdp <no-dsa> (Minor issue)
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
https://github.com/neutrinolabs/xrdp/commit/25a1fab5b6c5ef2a8bb109232b765cb8b332ce5e