CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCVE-2023-40184
Medium (6.5) in neutrinolabs xrdp. EPSS 0.9% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
- CWE
- CWE-755
- Published
- Modified
- Record from
- the NVD, synced
Affected
- neutrinolabs:xrdp
References
- https://github.com/neutrinolabs/xrdp/blame/9bbb2ec68f390504c32f2062847aa3d821a0089a/sesman/sesexec/session.c#L571C5-L571C19
- https://github.com/neutrinolabs/xrdp/commit/a111a0fdfe2421ef600e40708b5f0168594cfb23
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOT237TIHTHPX5YNIWLVNINOEYC7WMG2/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5IXMQODV3OIJ7DRQBUQV7PUKNT7SH36/